Assessing the prevalence and effect of adverse drug reactions among patients receiving first line anti-tubercular medicines in the Tamale Teaching Hospital, Ghana.

Introduction: tuberculosis (TB) remains a global major health problem, especially in developing countries. Although treatment regimen for TB has been highly effective, treatment-related adverse effects account for significant morbidity leading to reduced effectiveness of therapy and high default rate. This study evaluated the nature and occurrence of Adverse Drug Reactions (ADRs) in patients receiving first line antitubercular therapy (ATT) in Tamale Teaching Hospital (TTH) and its effects on adherence.

Methods: the study was a cross-sectional study for a period of six months. A total of 66 participants who were on first line antituberculotic therapy consented for the study. Data was collected using a questionnaire and analysed using SPSS version 22.0.

Results: about 77% (n=51) of the participants had experienced ADRs. Gastrointestinal symptoms were the most commonly reported symptoms of ADR (80%, n=41). Regarding adherence, over half (51.0%, n=26) said the occurrence of the Adverse Drug Reaction had affected the manner in which they take their medications. Of these, 84.6% (n=22) of the participants indicated that they skipped/missed their medications and 15.4% stopped the medication entirely. About 39.2% (n=20) reported ADRs to a healthcare practitioner and 60.8% did not. All the reported cases were managed by a health practitioner using another medication.

Conclusion: the study showed that ADRs are common among patients receiving first line ATT. Gastrointestinal tract (GIT) related ADRs were the most common. Adherence to first line antitubercular therapy is poor as a result of adverse drugs reaction.