Pharmacoepidemiological survey of middle-age and elderly patients in three communities of Cascavel, PR - Brazil: Progressive verification of their therapeutic knowledge

O objetivo da pesquisa foi identificar variáveis relacionadas ao conhecimento da terapêutica nos períodos pré e pós-intervenção e características sócio-demográficas de 80 pacientes de meia idade e idosos (45 anos ou mais) em três comunidades paroquiais de Cascavel-PR. Desenvolveu-se um inquérito farmacoepidemiológico, seguido de estudo prospectivo no período de novembro de 2003 a dezembro de 2004, e os dados foram coletados em formulário semi-estruturado. Houve predominância para o sexo feminino (82,5%), idade média de 67,3 anos, escolaridade de menos de oito anos de estudo (75,0%), maioria casado (57,5%), morando apenas o casal (63,7%), renda de 1 a 3 salários (80%), número médio de medicamentos prescritos na fase pré (4,3) e na pós-intervenção (3,5). A classe de fármacos mais prescrita foi para o sistema cardiovascular (48,2%). As variáveis, leitura da bula e freqüência, conhecimento sobre o medicamento, esquecimento da dose prescrita, satisfação com o medicamento e importância das informações, embora apresentassem diferenças na freqüência relativa do período pré-intervenção para o pós-intervenção, não sustentaram diferença estatisticamente significativa. Apesar desse resultado, é preciso considerar que a diferença quanto ao grau de evolução dos resultados apresentam relevância clinica, pendendo favoravelmente a relação benefício/risco.Variables on therapeutic knowledge in pre- and post-intervention periods and the social and demographic characteristics of 80 middle-aged and elderly (45 years or more) patients in three parish communities in Cascavel, PR - Brazil are provided. A pharmacoepidemiological survey was developed; a prospective study between November 2003 and December 2004 was undertaken; data were collected in a semi-structured form. Females (82.5%) were predominant; average age 67.3 years old; schooling less than 8 years; most of them married (57.5%); only the couple inhabits the house (63.7%); income 1 to 3 salaries (80%); mean numbers of prescribed medicines pre- and post-intervention were 4.3 and 3.5, respectively. Medicine for the cardiovascular system (48.2%) was the most described (48.2%). Variables - reading information on drug and its frequency, knowledge on the medicine used and importance of information - were statistically non-significant, although difference in relative frequency from the pre- to the post-intervention period existed. Nevertheless, difference with regard to degree of progress in results shows clinical relevance with a favorable trend towards the benefit/risk ratio

Frequency of potential interactions between drugs in medical prescriptions in a city in southern Brazil

CONTEXT AND OBJECTIVE: Drug interactions form part of current clinical practice and they affect between 3 and 5% of polypharmacy patients. The aim of this study was to identify the frequency of potential drug-drug interactions in prescriptions for adult and elderly patients. TYPE OF STUDY AND SETTING: Cross-sectional pharmacoepidemiological survey in the Parque Verde housing project, municipality of Cascavel, Paraná, Brazil, between December 2006 and February 2007. METHODS: Stratified cluster sampling, proportional to the total number of homes in the housing project, was used. The sample consisted of 95 homes and 96 male or female patients aged 19 or over, with medical prescriptions for at least two pharmaceutical drugs. Interactions were identified using DrugDigest, Medscape and Micromedex softwares. RESULTS: Most of the patients were female (69.8%), married (59.4%) and in the age group of 60 years or over (56.3%), with an income less than or equal to three minimum monthly salaries (81.3%) and less than eight years of schooling (69.8%); 90.6% of the patients were living with another person. The total number of pharmaceutical drugs was 406 (average of 4.2 medications per patient). The drugs most prescribed were antihypertensives (47.5%). The frequency of drug interactions was 66.6%. Among the 154 potential drug interactions, 4.6% were classified as major, 65.6% as moderate and 20.1% as minor. CONCLUSION: The high frequency of drug prescriptions with a potential for differentiated interactions indicates a situation that has so far been little explored, albeit a reality in household surveys