Abstract

This study aims to describe the use of prescribed and non-prescribed medications and associated factors among adolescents living in rural, quilombolas and non-quilombolas communities in the interior of Bahia, Brazil. This is a population-based survey with 390 adolescents between 10 and 19 years old in 2015. Prevalence and odds ratio for use of prescribed and non-prescribed medication, and multiple analysis was conducted by Multinomial Logistic Regression. Among the interviewees, 13.6% used only prescribed medications and 14.4% only used non-prescribed medications. Quilombolas demonstrated a greater diversity of pharmaceutical specialties used. The low prevalence of medication use in both groups of adolescents suggests less access to these products. Despite this, it was observed the irrational use of medication, mainly as self-medication. Quilombola adolescents, although they belong to the same area of coverage of other communities, presented different associated factors when compared to the non-quilombola group: the presence of toothache in the last 6 months and have had a regular source of care increased the use of prescribed medications.

Key words:
Drug utilization; Adolescent; Rural areas; Pharmacoepidemiology

Background

The medications are an important strategic source of health action, used to treat, cure or prevent numerous clinical conditions. Furthermore, they can be an important factor in the construction and modification of social dynamics, representing an invaluable technology that directly interferes with public health spending¹1 Rozenfeld S. Avaliação do uso dos medicamentos como estratégia para a reorientação da política de insumos em saúde. Cad Saude Publica 1989; 5(4):388-402..

Despite the benefit of treating many medical conditions, medications can also carry the risk of unwanted effects when used irrationally²2 FDA. Information for Consumers (Drugs) - Think It Through: Managing the Benefits and Risks of Medicines [Internet]. Center for Drug Evaluation and Research. Center for Drug Evaluation and Research; 2018 [cited 2018 out 21]. Available from: https://www.fda.gov/drugs/resourcesforyou/consumers/ucm143558.htm
https://www.fda.gov/drugs/resourcesforyo... . When non-prescribed by health professionals, their use is characterized as self-medication³3 World Health Organization (WHO). WHO Guidelines for the regulatory assessment of medicinal products for use in self-medication. WHO Drug Inf 2000; 14(1):18-26..

There are several factors that can influence the prescribed or non-prescribed medication use: morbidities, the social context, lifestyle, and social and demographic factors⁴4 Arrais PSD, Fernandes MEP, Pizzol TSD, Ramos LR, Mengue SS, Luiza VL, Tavares NUL, Farias MR, Oliveira MA, Bertoldi AD. Prevalence of self-medication in Brazil and associated factors. Rev Saude Publica 2016; 50.

5 Dal Pizzol TS, Pons ES, Hugo FN, Bozzetti MC, Sousa MLR, Hilgert JB. Uso de medicamentos entre idosos residentes em áreas urbanas e rurais de município no Sul do Brasil: um estudo de base populacional. Cad Saude Publica 2012; 28(1):104-114.

6 Medeiros DS, Moura CS, Guimarães MDC, Acurcio FA. Utilização de medicamentos pela população quilombola: inquérito no Sudoeste da Bahia. Rev Saude Publica 2013; 47(5):905-913.^-77 Aziz MM, Calvo MC, Schneider IJC, Xavier AJ, d'Orsi E. Prevalência e fatores associados ao acesso a medicamentos pela população idosa em uma capital do sul do Brasil: um estudo de base populacional. Cad Saude Publica 2011; 27(10):1939-1950.. In addition, medication use can be observed in all age groups, including those considered healthier, such as adolescents⁸8 Da Silva MVS, Trindade JBC, Oliveira CC, Mota GS, Carnielli L, Silva MFJ, Andrade MA. Consumo de medicamentos por estudantes adolescentes de escola de ensino fundamental do município de Vitória. Rev Ciencias Farm Basica e Apl 2009; 30(1):99-104.

9 Silva IM, Catrib AMF, Matos VC, Gondim APS. Automedicação na adolescência: um desafio para a educação em saúde. Cien Saude Colet 2011; 16(supl. 1):1651-1660.^-1010 Silva CH, Giugliani ERJ. Consumo de medicamentos em adolescentes escolares: uma preocupação. J Pediatr (Rio J) 2004; 80(4):326-332..

Adolescence is a phase characterized by the development of individual cognitive judgment and aggregation of values that can be carried into adulthood¹¹11 Shehnaz SI, Sreedharan J, Khan N, Issa KJ, Arifulla M. Factors associated with self-medication among expatriate high school students: a cross-sectional survey in United Arab Emirates. Epidemiol Biostat Public Heal 2013;10(4).. These values may be associated with the characteristics in which these individuals are inserted¹²12 Brasil. Ministério da Saúde (MS). Secretaria de Atenção em Saúde, Departamento de Ações Programáticas Estratégicas. Diretrizes Nacionais para a Atenção Integral à Saúde de Adolescentes e Jovens na Promoção, Proteção e Recuperação da Saúde [Internet]. Brasília: MS; 2010 [acessado 2018 out 21]. Disponível em: http://bvsms.saude.gov.br/bvs/publicacoes/diretrizes_nacionais_atencao_saude_adolescentes_jovens_promocao_saude.pdf. Therefore, in rural regions there are less offer of services, including physical, social and mental well-being, which can have an effect on the health of these adolescents¹³13 Lankila T, Näyhä S, Rautio A, Rusanen J, Taanila A, Koiranen M. Is geographical distance a barrier in the use of public primary health services among rural and urban young adults? Experience from Northern Finland. Public Health 2016; 131:82-91.

14 Costa AGM, Luna IT, Silva AA, Mesquita JS, Pinheiro PNC, Veira NFC. Percepção de saúde de adolescentes de comunidade rural: entre o ideal e o real. Rev Eletrônica Enferm [Internet]. 2013 [acessado 2021 out 5];15(4):870-877. Disponível em: https://revistas.ufg.br/fen/article/view/19710
https://revistas.ufg.br/fen/article/view...

15 Patterson BJ, Kaboli PJ, Tubbs T, Alexander B, Lund BC. Rural access to clinical pharmacy services. J Am Pharm Assoc 2014; 54(5):518-525.^-1616 Uchoa AC, Souza EL, Spinelli AFS, Medeiros RG, Peixoto DCS, Silva RAR, Rocha NSP. Avaliação da satisfação do usuário do Programa de Saúde da Família na zona rural de dois pequenos municípios do Rio Grande do Norte. Physis 2011; 21(3):1061-1076..

Brazilian rural areas remains precarious when compared to the urban areas. Several vulnerability are present, which determine the health situation of the populations, such as lack of basic sanitation, irregular water supply, less access to health and education services, unemployment and food insecurity¹⁷17 Brasil. Ministério da Saúde (MS). Secretaria de Gestão Estratégica e Participativa. Política Nacional de Saúde Integral das Populações do Campo e da Floresta [Internet]. 1ª ed. Brasília: MS; 2013 [acessado 2018 out 21]. 48 p. Disponível em: http://www.saude.gov.br/bvs.

Among rural populations, we highlight a considerably vulnerable community: the quilombola. These populations formed unique communities, constituted initially as a space of black resistance to the slave system, growing as a social movement of political and cultural resistance against oppression and racial discrimination¹⁸18 Arruti JMPA. Mocambo: antropologia e histo´ria do processo de formac¸a~o quilombola [Internet]. vol. 10. Florianópolis: EDUSC; 2006. 368 p. [acessado 2018 out 21]. Disponível em: https://www.anpocs.com/index.php/publicacoes-sp-2056165036/livros/291-mocambo-antropologia-e-historia-do-processo-de-formacao-quilombola^,1919 Calheiros FP, Stadtler HHC. Identidade étnica e poder: os quilombos nas políticas públicas brasileiras. Rev Katálysis 2010; 13(1):133-119..

As residents of quilombola communities, the adolescents are exposed to various access barriers and limitations to health services, which may influence the profile of prescribed and non-prescribed medication use²⁰20 Guerrero AFH, Silva DO, Toledo LM, Guerrero JCH, Teixeira P. Mortalidade infantil em remanescentes de quilombos do Munícipio de Santarém - Pará, Brasil. Saude Soc 2007; 16(2):103-110.^,2121 Freitas DA, Caballero AD, Marques AS, Hernández CIV, Antunes SLNO. Saúde e comunidades quilombolas: uma revisão da literatura TT - Health and quilombolas communities. Rev CEFAC 2011; 13(5):937-943..

Considering the vulnerability of this population and the lack of studies, this study aimed to describe the use of prescribed and non-prescribed medication and associated factors among rural quilombola and non-quilombola adolescents in the countryside of Bahia, Brazil.

Methods

This study is part of the project “ADOLESCER: Rural Adolescent Health and its conditioning factors”, carried out in rural communities in the municipality of Vitoria da Conquista, Bahia. It was a population-based cross-sectional household survey²²22 Sousa BC, Medeiros DS, Curvelo MHS, Silva EKP, Teixeira CSS, Bezerra V, Souzas R, Leite AJM. Hábitos alimentares de adolescentes quilombolas e não quilombolas da zona rural do semiárido baiano. Cien Saude Colet 2019; 24(2):419-430..

The research project was approved by the Ethics Committee of the Universidade Federal da Bahia - Campus Anísio Teixeira. Adolescents aged 18 years or older signed the Informed Consent Form. All adolescents under 18 years of age signed the Informed Assent Form and their legal guardians signed the Informed Consent Form, agreeing to participate in the study. The presence of severe mental disorders with cognitive impairment was used as an exclusion criterion.

The sample universe was estimated in 811 adolescents, obtained through the registration of families living in the areas covered by the Family Health Teams. The adolescents were divided into two strata: quilombolas (N=350), formed by residents of quilombola communities recognized by Palmares Cultural Foundation, and non-quilombolas (N=461).

The sample size calculation considered a precision of 5%, confidence level of 95%, and design effect of 1.0, resulting in 210 interviews for non-quilombola adolescents and 184 for quilombolas. An addition of 15% was made to mitigate possible losses. However, considering that there would be only one adolescent interviewed per household in quilombola families and that the number of households would be exceeded, we added 7.1% to the losses in this group.

The data collection instrument was developed from national surveys²³23 Penna G. Pesquisa Nacional de Saúde do Escolar (PeNSE). Cien Saude Coletiva 2010; 15(Supl. 2):3006.^,2424 Brasil. Ministério da Saúde (MS). Instituto Brasileiro de Geografia e Estatística (IBGE). Pesquisa Nacional de Saúde 2013. Brasília: MS/IBGE; 2014.. A pilot study was conducted in a rural community not participating in the main study to evaluate the data collection instruments and the feasibility of the research.

The collection was conducted from January to May 2015, with previously trained interviewers. The interviews were performed with portable computers (HP Pocket Rx5710). The Questionnaire Development System software (QDS^TM; NOVA Research Company), version 2.6.1, was used for scheduling and data storage. For quality assurance, re-interviews were conducted in 5% of the sample within 7 days of the initial interview.

The dependent variable of this study, medication use, was obtained through the following question, “In the past 15 days have you used any medication?”. This was verified by the presentation of packages or prescriptions. For the affirmative answers, the name, pharmaceutical form, and dose of each pharmaceutical specialty were collected. The specialties were classified according to the Anatomical Therapeutic Chemical Classification System (ATC)²⁵25 World Health Organization (WHO). Anatomical Therapeutic Chemical (ATC)/DDD Index 2020. WHO Collaborating Centre for Drugs Statistics Methodology. 2020. at all levels: anatomical, therapeutic and chemical. Each specialty was subdivided into its active principles with the help of Anvisa’s bulary²⁶26 Saúde MDA. Bulário eletrônico. [Internet]. [acessado 2018 dez 2]. Disponível em: http://www.anvisa.gov.br/datavisa/fila_bula/index.asp
http://www.anvisa.gov.br/datavisa/fila_b... . To understand if the medication was prescribed or non-prescribed, a second question was asked, “Was this medication prescribed by a health care professional (doctor, nurse, or dentist)?”.

The independent variables were selected from the questionnaire after a literature review we adjusted and organized in a hierarchical model divided into three blocks according to proximity to the dependent variable: sociodemographic factors and household characteristics (sex, skin color, schooling, current job, economic level, household walls), lifestyle ( one-dose alcohol experimentation, tobacco experimentation), family and social context (number of household residents, family composition, family supervision, number of close friends) and, finally, the variables indicating health status and service use (self-assessment of health, toothache in the last 6 months, leaving activities due to illness, seeking care in the last 15 days, medical visits in the last 12 months, hospitalization in the 12 months, regular source of care, use of natural medications) (Figure 1).

The simple frequencies of prescribed and non-prescribed medication use were estimated for each stratum separately, quilombolas and non-quilombolas. The group that used both prescribed and non-prescribed medications was excluded from the analysis of factors associated with use. The medication was also used as the unit of analysis for the description of the pharmaceutical specialties by means of the frequency distribution.

To estimate the association between medication use with the independent variables, the Odds Ratio (OR) was performed, for each stratum individually (quilombola and non-quilombola). The OR was estimated by multinomial logistic regression. Multiple analysis was considered to minimize the confounding effect. All variables that in the bivariate analysis showed Pearson’s chi-square or Fisher’s p value <0.20 were included in the initial model. Model fitting was performed using the hierarchical bakward method, and Akaike’s criterion (AIC) was applied for adequacy.

For the adjustment of the multiple hierarchical model, for both non-quilombola and quilombola strata, the independent variables corresponding to the conceptual model were used according to the level of proximity with the dependent variable (Figure 1). For model 1, the variables of the distal block, sociodemographic factors and household characteristics were used for the adjustment; for the adjustment of model 2, the variables of the intermediate block plus the distal block, lifestyle, family and social context, sociodemographic factors and household characteristics were used; for the adjustment of model 3, the variables of the proximal model were used, plus the variables of the intermediate and distal block, health conditions and use of services, lifestyle, family and social context, sociodemographic factors and household characteristics. For the other tests and for the permanence of the variables in the final model, a significance level of p value <0.05 was considered. Stata software, version 15.0 (Stata Corporation, College Station, USA) was used for the analyses.

Results

Of the 390 rural adolescents, four reported the use of natural, herbal or homeopathic medicines, which we excluded from the analysis. Three individuals reported using both prescribed and non-prescribed medications, and were also excluded from the analysis. The final sample was composed of 383 adolescents, 56.9% (218) of which were non-quilombolas and 43.1% (165) quilombolas. Of this total, 72.0% (276) did not use medications, 13.6% (52) used only prescribed medications, and 14.4% (55) used only non-prescribed medications. Considering the strata of non-quilombola and quilombola adolescents, we observed 75.2% (164) and 67.9% (112) of non-use, 11.5% (25) and 16.3% (27) use of prescribed medications, and 13.3% (29) and 15.8% (26) use of non-prescribed medication, respectively.

Of the 143 medications used, the most frequent prescribed pharmacological specialties in the non-quilombola adolescent stratum were 43.7% nervous system medications, with 30.8% analgesics, and 23.1% anti-infective for systemic use, with 20.5% antibacterials. Among the non-prescription medications, nervous system medications stood out (63.6%), with 63.6% of analgesics (Table 1).

For the quilombolas, the following medications were prominent among those prescribed: medications for the nervous system (21.4%), with 14.3% of antiepileptic medications; digestive system and metabolism (21.4%), with 11.9% of medications for gastrointestinal disorders; musculoskeletal system (19.0%), with 19.0% of anti-inflammatory and antirheumatic medications; respiratory system (16.8%), and anti-infectious agents for systemic use (11.9%), with 11.9% of antibacterial drugs. Among the non-prescribed medications, 72.4% acted on the nervous system, being all analgesics, and 17.2% for the Musculo-skeletal system, with 13.8% anti-inflammatory and antirheumatic medications (Table 1).

The use of medications by non-quilombola adolescents showed a significant association with one-dose alcohol experimentation, leaving activities due to illness, and seeking care in the past 15 days (Table 2).

For the quilombola adolescent stratum, medication use was significantly different according to economic level, one-dose alcohol experimentation, and the variables of health status and service utilization (self-assessment of health, toothache in the past 6 months, leaving activities due to illness, seeking care in the past 15 days, medical visits in the past 12 months, and have had regular source of care) (Table 2).

After adjusted analysis, the following factors were shown to increase the use of prescribed medication by non-quilombola adolescents: leaving activities due to illness (OR 4.36; 95%CI 1.47-12.91) and seeking care in the last 15 days (OR 3.63; 95%CI 1.34-9.81). Non-prescribed use was positively associated with economic levels B and C (OR 2.57; 95%CI 1.11-5.99) and higher schooling (OR 1.27; 95%CI 1.10-1.47) (Table 3).

Among adolescents from quilombola communities, the use of prescribed medications was associated with economic levels B and C (OR 2.71; 95%CI 1.08-6.78), the occurrence of toothache in the last 6 months (OR 3.25; 95%CI 1.16-9.12), leaving activities due to illness (OR 6.41; 95%CI 1.49-27.64) and have had a regular source of care (OR 4.28; 95%CI 1.13-16.35). Associations with the use of non-prescribed medications were identified with increasing schooling (OR 1.42; 95%CI 1.18-1.72). The variable medical visits in the last 12 months, despite not being statistically significant, proved important to explain the use behavior in this population (Table 3).

Discussion

This study found a low prevalence of medication use among rural adolescents when compared to other studies conducted with adolescents⁴4 Arrais PSD, Fernandes MEP, Pizzol TSD, Ramos LR, Mengue SS, Luiza VL, Tavares NUL, Farias MR, Oliveira MA, Bertoldi AD. Prevalence of self-medication in Brazil and associated factors. Rev Saude Publica 2016; 50.^,88 Da Silva MVS, Trindade JBC, Oliveira CC, Mota GS, Carnielli L, Silva MFJ, Andrade MA. Consumo de medicamentos por estudantes adolescentes de escola de ensino fundamental do município de Vitória. Rev Ciencias Farm Basica e Apl 2009; 30(1):99-104.^,2727 Hales CM, Kit BK, Gu Q, Ogden CL. Trends in prescription medication use among children and adolescents-United States, 1999-2014. J Am Med Assoc 2018; 319(19):2009-2020.

28 Silva CH, Giugliani ERJ. Consumption of medicines among adolescent students: a concern. J Pediatr 2004; 80.^-2929 Bergmann GG, Bertoldi AD, Mielke GI, Camargo AL, Matijasevich A, Hallal PC. Atividade física, tempo de tela e utilização de medicamentos em adolescentes: coorte de nascimentos de Pelotas, Rio Grande do Sul, Brasil, 1993. Cad Saude Publica 2016; 32(4):1-12.. We observed a greater diversity of pharmaceutical specialties used by the quilombolas and different associated factors, which reveals the specificity of this community.

The prevalence of prescribed (13.6%) and non-prescribed (14.4%) medication use for both non-quilombola and quilombola adolescents was lower compared to other studies also conducted with adolescents⁴4 Arrais PSD, Fernandes MEP, Pizzol TSD, Ramos LR, Mengue SS, Luiza VL, Tavares NUL, Farias MR, Oliveira MA, Bertoldi AD. Prevalence of self-medication in Brazil and associated factors. Rev Saude Publica 2016; 50.^,88 Da Silva MVS, Trindade JBC, Oliveira CC, Mota GS, Carnielli L, Silva MFJ, Andrade MA. Consumo de medicamentos por estudantes adolescentes de escola de ensino fundamental do município de Vitória. Rev Ciencias Farm Basica e Apl 2009; 30(1):99-104.^,2727 Hales CM, Kit BK, Gu Q, Ogden CL. Trends in prescription medication use among children and adolescents-United States, 1999-2014. J Am Med Assoc 2018; 319(19):2009-2020.

28 Silva CH, Giugliani ERJ. Consumption of medicines among adolescent students: a concern. J Pediatr 2004; 80.^-2929 Bergmann GG, Bertoldi AD, Mielke GI, Camargo AL, Matijasevich A, Hallal PC. Atividade física, tempo de tela e utilização de medicamentos em adolescentes: coorte de nascimentos de Pelotas, Rio Grande do Sul, Brasil, 1993. Cad Saude Publica 2016; 32(4):1-12.. Hales et al²⁷27 Hales CM, Kit BK, Gu Q, Ogden CL. Trends in prescription medication use among children and adolescents-United States, 1999-2014. J Am Med Assoc 2018; 319(19):2009-2020. demonstrated that the prescribed medication use among adolescents between 12 and 19 years old in the United States from 1999 to 2014 was 25.9%. In Brazil, Pelotas, RS, Bergmann et al.²⁹29 Bergmann GG, Bertoldi AD, Mielke GI, Camargo AL, Matijasevich A, Hallal PC. Atividade física, tempo de tela e utilização de medicamentos em adolescentes: coorte de nascimentos de Pelotas, Rio Grande do Sul, Brasil, 1993. Cad Saude Publica 2016; 32(4):1-12. identified that adolescents aged 11 to 18 years in 1993 exhibited 36.7% of such use. Silva et al.¹⁰10 Silva CH, Giugliani ERJ. Consumo de medicamentos em adolescentes escolares: uma preocupação. J Pediatr (Rio J) 2004; 80(4):326-332., in Porto Alegre, RS, Brazil, showed a prevalence of 49.5% in adolescent students. In Vitoria, ES, 42.3% of school adolescents used medication, and of this total, 46.7% were prescribed⁸8 Da Silva MVS, Trindade JBC, Oliveira CC, Mota GS, Carnielli L, Silva MFJ, Andrade MA. Consumo de medicamentos por estudantes adolescentes de escola de ensino fundamental do município de Vitória. Rev Ciencias Farm Basica e Apl 2009; 30(1):99-104..

Arrais⁴4 Arrais PSD, Fernandes MEP, Pizzol TSD, Ramos LR, Mengue SS, Luiza VL, Tavares NUL, Farias MR, Oliveira MA, Bertoldi AD. Prevalence of self-medication in Brazil and associated factors. Rev Saude Publica 2016; 50., in a study based on data from the National Survey on Access, Use and Promotion of Rational Use of Medicines in Brazil (PNAUM), showed that the prevalence of self-medication in the 15 days prior to the interview in Brazil was 19.6% for adolescents. However, other studies on self-medication in Brazil have shown even higher prevalences⁸8 Da Silva MVS, Trindade JBC, Oliveira CC, Mota GS, Carnielli L, Silva MFJ, Andrade MA. Consumo de medicamentos por estudantes adolescentes de escola de ensino fundamental do município de Vitória. Rev Ciencias Farm Basica e Apl 2009; 30(1):99-104.^,3030 Carvalho R, Julia A, Godoy A, Halpern R. Automedicação e comportamento entre adolescentes em uma cidade do Rio Grande do Sul. [acessado 2018 jun 24]. Disponível em: http://pepsic.bvsalud.org/pdf/aletheia/n41/n41a11.pdf
http://pepsic.bvsalud.org/pdf/aletheia/n...

31 Pardo IMCG, Jozala DR, Carioca AL, Nascimento SRD, Santucci VCR. Automedicação: prática frequente na adolescência? Estudo em uma amostra de estudantes do ensino médio de sorocaba. Rev Fac Ciências Médicas Sorocaba 2013; 15(2):11-15.

32 Loyola Filho AI, Uchoa E, Guerra HL, Firmo JOA, Lima-Costa MF. Prevalência e fatores associados à automedicação: resultados do projeto Bambuí. Rev Saude Publica 2002; 36(1):55-62.

33 Gualano MR, Bert F, Passi S, Stillo M, Galis V, Manzoli L, Siliquini R. Use of self-medication among adolescents: a systematic review and meta-analysis. Eur J Public Health 2015; 25(3):444-450.^-3434 Pfaffenbach G, Tourinho F, Bucaretchi F. Self-Medication Among Children and Adolescents. Curr Drug Saf 2010; 5(4):324-328.. Pfaffenbachet et al.³⁴34 Pfaffenbach G, Tourinho F, Bucaretchi F. Self-Medication Among Children and Adolescents. Curr Drug Saf 2010; 5(4):324-328., reported that between 1988 and 2009, the prevalence of self-medication in studies with adolescents in Brazil ranged from 21.1% to 56.6%. In another study with adolescent students in Sorocaba, SP, 96.2% self-medicated³¹31 Pardo IMCG, Jozala DR, Carioca AL, Nascimento SRD, Santucci VCR. Automedicação: prática frequente na adolescência? Estudo em uma amostra de estudantes do ensino médio de sorocaba. Rev Fac Ciências Médicas Sorocaba 2013; 15(2):11-15.. In Vitoria, ES, among the adolescents who used medications, 53.3% used non-prescribed ones⁸8 Da Silva MVS, Trindade JBC, Oliveira CC, Mota GS, Carnielli L, Silva MFJ, Andrade MA. Consumo de medicamentos por estudantes adolescentes de escola de ensino fundamental do município de Vitória. Rev Ciencias Farm Basica e Apl 2009; 30(1):99-104..

The existence of barriers that hinder the access to medications by the population of rural adolescents must be considered, which can be justified by the geographical location of the communities, in areas with more difficult access to health services. The greater distances to health services or pharmacies, poor conditions of the public roads that make transportation more difficult, or insufficient/inadequate transportation, the greater financial cost and time expenditure that these individuals face, may expose them to fewer outpatient visits, as well as less acquisition⁵5 Dal Pizzol TS, Pons ES, Hugo FN, Bozzetti MC, Sousa MLR, Hilgert JB. Uso de medicamentos entre idosos residentes em áreas urbanas e rurais de município no Sul do Brasil: um estudo de base populacional. Cad Saude Publica 2012; 28(1):104-114.^,66 Medeiros DS, Moura CS, Guimarães MDC, Acurcio FA. Utilização de medicamentos pela população quilombola: inquérito no Sudoeste da Bahia. Rev Saude Publica 2013; 47(5):905-913.^,1515 Patterson BJ, Kaboli PJ, Tubbs T, Alexander B, Lund BC. Rural access to clinical pharmacy services. J Am Pharm Assoc 2014; 54(5):518-525..

Furthermore, when it comes to investigating the use of medications by a certain population, one must take into consideration the comorbidities they refer to.⁵5 Dal Pizzol TS, Pons ES, Hugo FN, Bozzetti MC, Sousa MLR, Hilgert JB. Uso de medicamentos entre idosos residentes em áreas urbanas e rurais de município no Sul do Brasil: um estudo de base populacional. Cad Saude Publica 2012; 28(1):104-114. It is also possible that our sample was composed of healthier adolescents than the studies cited, if we consider that adolescents from the rural area of Vitoria da Conquista, BA, reported healthier eating habits and healthier behaviors²²22 Sousa BC, Medeiros DS, Curvelo MHS, Silva EKP, Teixeira CSS, Bezerra V, Souzas R, Leite AJM. Hábitos alimentares de adolescentes quilombolas e não quilombolas da zona rural do semiárido baiano. Cien Saude Colet 2019; 24(2):419-430., reduced tobacco consumption³⁵35 Silva RMA, Bezerra V, Medeiros DS. Experimentação de tabaco e fatores associados entre adolescentes da zona rural de vitória da conquista, BA, Brasil. Cien Saude Colet 2019; 24(2):431-441. and, therefore, have consumed less medication. However, since the illness profile of the population studied was not evaluated, it was not possible to establish this relationship.

The prevalence of use of prescribed and non-prescribed medications was similar among quilombola and non-quilombola adolescents. However, the quilombolas showed a greater diversity of pharmaceutical specialties consumed by prescription, such as: nervous system, digestive system and metabolism, musculoskeletal, and respiratory, in addition to anti-infective medications for systemic use. The anti-anemic preparations and anthelmintics are also highlighted, which were only evidenced in this group.

Linked to the reality of rural communities, which are, in general of low economic status and precarious sanitary conditions, the quilombola communities present peculiar characteristics of vulnerability and exclusion that were shaped by the historical, socioeconomic, and cultural context in which they are inserted¹⁸18 Arruti JMPA. Mocambo: antropologia e histo´ria do processo de formac¸a~o quilombola [Internet]. vol. 10. Florianópolis: EDUSC; 2006. 368 p. [acessado 2018 out 21]. Disponível em: https://www.anpocs.com/index.php/publicacoes-sp-2056165036/livros/291-mocambo-antropologia-e-historia-do-processo-de-formacao-quilombola^,2121 Freitas DA, Caballero AD, Marques AS, Hernández CIV, Antunes SLNO. Saúde e comunidades quilombolas: uma revisão da literatura TT - Health and quilombolas communities. Rev CEFAC 2011; 13(5):937-943..

Silva et al.³⁶36 Silva EKP, Medeiros DS, Martins PC, Sousa LA, Lima GP, Rêg MAS. Insegurança alimentar em comunidades rurais no Nordeste brasileiro: faz diferença ser quilombola? Cad Saude Publica 2017; 33:14., based on the same rural community of adolescents, revealed that 52.1% of the population had food insecure, being significantly more present in the quilombola population (64.9%) in relation to the non-quilombola population (42.0%). Other differences were also found, such as worse conditions of water supply, piped water, and treated water in the quilombola population compared to the non-quilombola population. Thus, these results may show the influence of these factors on the higher risk of illness and self-perception of health²²22 Sousa BC, Medeiros DS, Curvelo MHS, Silva EKP, Teixeira CSS, Bezerra V, Souzas R, Leite AJM. Hábitos alimentares de adolescentes quilombolas e não quilombolas da zona rural do semiárido baiano. Cien Saude Colet 2019; 24(2):419-430., which has an impact on the medication’s use³⁷37 Marques AS, Freitas DA, Leão CDA, Oliveira SKM, Pereira MM, Caldeira AP. Atenção Primária e saúde materno-infantil: a percepção de cuidadores em uma comunidade rural quilombola. Cien Saude Colet 2014; 19(2):365-371..

Among the pharmaceutical specialties, comparable to other studies, medications from the analgesic class were the most used²⁸28 Silva CH, Giugliani ERJ. Consumption of medicines among adolescent students: a concern. J Pediatr 2004; 80.^,3131 Pardo IMCG, Jozala DR, Carioca AL, Nascimento SRD, Santucci VCR. Automedicação: prática frequente na adolescência? Estudo em uma amostra de estudantes do ensino médio de sorocaba. Rev Fac Ciências Médicas Sorocaba 2013; 15(2):11-15.^,3838 Tourinho FSV, Bucaretchi F, Stephan C, Cordeiro R. Farmácias domiciliares e sua relação com a automedicação em crianças e adolescentes. J Pediatr 2008; 84(5):416-422., mainly among the non-prescribed ones. This fact is explained both by the free access to these medications and the higher incidence of mild or acute diseases present in this age group³¹31 Pardo IMCG, Jozala DR, Carioca AL, Nascimento SRD, Santucci VCR. Automedicação: prática frequente na adolescência? Estudo em uma amostra de estudantes do ensino médio de sorocaba. Rev Fac Ciências Médicas Sorocaba 2013; 15(2):11-15..

Access to medications is facilitated both by the presence of home inventory and by the permissiveness of buying over-the-counter medications¹⁹19 Calheiros FP, Stadtler HHC. Identidade étnica e poder: os quilombos nas políticas públicas brasileiras. Rev Katálysis 2010; 13(1):133-119., which favors self-medication²⁰20 Guerrero AFH, Silva DO, Toledo LM, Guerrero JCH, Teixeira P. Mortalidade infantil em remanescentes de quilombos do Munícipio de Santarém - Pará, Brasil. Saude Soc 2007; 16(2):103-110.. Among adolescents, the use of non-prescribed medications has a great family influence in the decision making and choice of the medication to be used, which may reflect in the reproduction of this posture when these individuals reach autonomy⁴4 Arrais PSD, Fernandes MEP, Pizzol TSD, Ramos LR, Mengue SS, Luiza VL, Tavares NUL, Farias MR, Oliveira MA, Bertoldi AD. Prevalence of self-medication in Brazil and associated factors. Rev Saude Publica 2016; 50.. This behavior can be evaluated as an opportunity for the individual to take responsibility to take care of his own health in situations of minor illnesses, and to encourage self-care ²³23 Penna G. Pesquisa Nacional de Saúde do Escolar (PeNSE). Cien Saude Coletiva 2010; 15(Supl. 2):3006.. But it can also be seen as a health risk due to its irrational use, as well as an indication of the difficulty of access to health services²³23 Penna G. Pesquisa Nacional de Saúde do Escolar (PeNSE). Cien Saude Coletiva 2010; 15(Supl. 2):3006., and the limited access of adolescents to services.

The consumption of systemic antibacterials used without medical prescription, in both groups, is noteworthy for going against the restrictions set forth in the Collegiate Directorate Resolution (RDC), No. 20 of 2011, which provides for the control of antimicrobials³⁹39 Brasil. Agência Nacional de Vigilância Sanitária (Anvisa). Resolução RDC 20, de 5 de maio de 2011. Dispõe sobre o controle de medicamentos à base de substâncias classificadas como antimicrobianos, de uso sob prescrição, isoladas ou em associação. [Internet]. Diário Oficial da União 2011.. This points to the importance of the presence of the pharmacist in these areas of difficult access to health services to avoid the irrational use of medications.

The pharmacist can be inserted in Primary Care, through the Family Health Support Center (NASF), with the objective of ensuring that the population has access to quality pharmacotherapy, to the provision of pharmaceutical services, and to contribute to the rational use of medications, as established in Ordinance No. 154, January 24, 2008, of the Ministry of Health⁴⁰40 Brasil. Ministério da Saúde (MS). Portaria no 154, de 24 de janeiro de 2008. Cria os Núcleos de Apoio à Saúde da Família - NASF. [Internet]. 2008. [acessado 2018 dez 18]. Disponível em: http://bvsms.saude.gov.br/bvs/saudelegis/gm/2008/prt0154_24_01_2008.html
http://bvsms.saude.gov.br/bvs/saudelegis... . However, for the effective exercise of this professional, it is necessary that he establishes a bond of trust with the community. This requires more time with the community, which would make it possible to identify the demands of each location, and to apply effective interventions.

It is also a warning sign the appearance of medications from the class of sex hormones and genital system modulators as self-medication for adolescents in both groups. Considering that these drugs are prescribed in the routine of local health units, this result may reflect in the fragility of insertion of the adolescent in sexual health policies, which besides not preventing sexually transmitted infections (STI), their irrational use may not guarantee contraception.

Sousa et al.⁴¹41 Sousa BC, Santos RS, Santana KC, Souzas R, Leite ÁJM, Medeiros DS. Comportamento sexual e fatores associados em adolescentes da zona rural. Rev Saude Publica 2018; 52:39., identified that for the same rural adolescents, 38.6% of the non-quilombolas and 59.9% of the quilombolas did not receive any guidance on pregnancy, 36.3% of the non-quilombolas and 53.9% of the quilombolas did not receive any guidance on AIDS or other STIs, and 60.4% started their sexual lives at the age of 15 or younger, which could increase the risk of unwanted pregnancy and sexually transmitted infections, especially among quilombolas.

Economic levels B and C increased the chance of use of prescribed medication by 1.71 times among the quilombola adolescents. This variable also positively influenced self-medication among non-quilombola adolescents. Boing et al⁴²42 Boing AC, Bertoldi AD, Peres KG. Desigualdades socioeconômicas nos gastos e comprometimento da renda com medicamentos no Sul do Brasil. Rev Saude Publica 2011; 45(5):897-905. argue that, for individuals with higher income, the consumption of medications tends to be higher due to the financial ease of obtaining them. Another aspect to be highlighted is the location of the Family Health Units (FHU), which, for the most part, are located in non-quilombola communities, enabling their acquisition, when prescribed, by the public health system. Therefore, for those adolescents who live in communities at a great distance from the FHU, the financial dependence for the acquisition of medications is greater.

The association between higher schooling and greater chance of medication use was observed only for non-prescribed medications, both for quilombola and non-quilombola adolescents. This finding is often among adult individuals, in which the increase in schooling allows for a better understanding of the therapeutics used⁷7 Aziz MM, Calvo MC, Schneider IJC, Xavier AJ, d'Orsi E. Prevalência e fatores associados ao acesso a medicamentos pela população idosa em uma capital do sul do Brasil: um estudo de base populacional. Cad Saude Publica 2011; 27(10):1939-1950.^,4343 Franco CM, Costa N, Silveira MR, Acurcio FA, Junior AAG, Guibu IA, Costa KS, Karnikowski MGO, Soeiro OM, Leite SN, Costa EA, Nascimento RCRM, Araújo VE, Álvares J. Utilização de medicamento pelos usuários da atenção primária do Sistema Único de Saúde. Rev Saude Publica 2017; 1-11.. Among adolescents, a possible explanation for this positive association is that the increase in schooling coincides with the increase in age and the gain in autonomy, which can influence the adolescent’s attitude in taking responsibility for their own health¹¹11 Shehnaz SI, Sreedharan J, Khan N, Issa KJ, Arifulla M. Factors associated with self-medication among expatriate high school students: a cross-sectional survey in United Arab Emirates. Epidemiol Biostat Public Heal 2013;10(4).^,3131 Pardo IMCG, Jozala DR, Carioca AL, Nascimento SRD, Santucci VCR. Automedicação: prática frequente na adolescência? Estudo em uma amostra de estudantes do ensino médio de sorocaba. Rev Fac Ciências Médicas Sorocaba 2013; 15(2):11-15., especially concerning self-medication behavior.

The seeking for the same health service increased the use of prescribed medications by 3.28 times among quilombola adolescents, which reinforces the importance of the relationship of trust that individuals develop with the FHU team and the formation of a bond. It is only through this connection between the individual and the unit’s professionals that comprehensive care of adolescent health becomes possible⁴⁴44 Schimith MD, Lima MADS. Acolhimento e vínculo em uma equipe do Programa Saúde da Família. Cad Saude Publica 2004; 20(6):1487-1494..

This study also identified that leaving activities due to illness increased the chance of prescribed medication use among non-quilombola adolescents by 3.36 times, and among quilombolas, by 5.41 times. Individuals in poorer health conditions tend to seek more services and medication remains one of the most used therapeutic strategies. When it comes to adolescents, the low burden of morbidity leads to the use of medications based on curative actions, associated with the influence of the caregiver, while those with more serious medical conditions tend to seek medical assistance, which consequently leads to the consumption of prescribed medications⁶6 Medeiros DS, Moura CS, Guimarães MDC, Acurcio FA. Utilização de medicamentos pela população quilombola: inquérito no Sudoeste da Bahia. Rev Saude Publica 2013; 47(5):905-913..

Another important indicator of poorer health status among quilombola adolescents was the occurrence of toothache in the past 6 months, increasing the chance of prescribed medication use by 2.25 times. This association may reveal the difficulty of access to dental services and continued oral health education. Silva⁴⁵45 Silva EKP, Santos PR, Chequer TPR, Melo CMA, Santana KC, Amorim MM, Medeiros DS. Saúde bucal de adolescentes rurais quilombolas e não quilombolas : um estudo dos hábitos de higiene e fatores associados Oral health of quilombola and non-quilombola rural adolescents : a study of hygiene habits and associated factors. Cien Saude Colet 2018; 23:2963-2978., in a study on oral hygiene habits with this same population, showed that dental pain, besides being related to the conditions of location of oral health services, transportation difficulties, and prioritization of some population groups, is also related to the inequities and social vulnerability present in this population.

Furthermore, among the quilombolas, despite the absence of statistical significance, having had a medical visit in the last 12 months proved to be a protective factor for self-medication, revealing that the effective access to health services can minimize this behavior.

This study has some limitations. The age group studied ranges from younger to older adolescents, and the degree of autonomy varies. Thus, in cases where the choice of the medication to be used came from a family member, for example, the adolescent may not have been aware of the use and some degree of memory bias may have emerged. One strategy to minimize this possible bias was to use the 15-day recall period. Furthermore, considering that younger adolescents may not be responsible for their treatment, the existence of some other information bias cannot be ruled out.

Another limitation was the failure to obtain clinical information about the diseases for which the adolescents used the medications, which would have contributed to the analysis and understanding of the results. In addition, the low number of observations in some of the analyses may have reduced the sample power, limiting the detection capacity of the statistical tests used. However, this fact does not compromise the found associations.

Conclusion

The low prevalence of medication use observed in both non-quilombola and quilombola adolescents suggests less access to these products. Economic levels B and C, higher schooling, leaving activities due to illness and seeking care in the last 15 days were associated with the use of prescribed and non-prescribed medications in both groups. Although quilombola adolescents belong to the same rural area as the other communities, they presented different predictors: the presence of toothache in the last 6 months and have had a regular source of care increased the use of prescribed drugs in this group.

Acknowledgments

To all the communities in which the project was carried out, the local health team and the researchers of this project. This study was funded in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.

References

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