ABSTRACT BACKGROUND: Favipiravir is generally used in treating coronavirus disease 2019 (COVID-19) pneumonia in Turkey. OBJECTIVE: To determine the side effects of favipiravir and whether it is a good treatment option. DESIGN AND SETTING: Retrospective study conducted in Atatürk Chest Diseases and Chest Surgery Training and Research Hospital, Ankara, Turkey. METHODS: 357 patients who completed favipiravir treatment at the recommended dose were included. 37 patients with drug side effects and 320 patients without drug side effects were examined in two groups. RESULTS: Side effects were observed in 37 (10.36%) out of 357 patients using favipiravir. The most common side effect was liver dysfunction, in 26 (7.28%) of the patients. The following other side effects were also observed: diarrhea (1.4%), nausea (0.84%), abdominal pain (0.28%) and thrombocytopenia (0.28%). One patient (0.28%) presented both increased transaminases and nausea. CONCLUSION: In this study, it was determined that favipiravir may constitute an alternative for treating COVID-19 pneumonia given that its side effects are generally well tolerated and not serious.

SUMMARY OBJECTIVE: Failure to achieve high levels of medication adherence in obstructive lung diseases is a major cause of uncontrolled disease. The purpose of this study is to reveal clinicians’ opinions on the level of patient adherence and the change in adherence during the COVID-19 pandemic. METHODS: A questionnaire containing multiple-choice questions about treatment adherence in patients with obstructive lung diseases was voluntarily applied to doctors working in a tertiary hospital for chest diseases. RESULTS: Eighty-one doctors (mean age, 37.2 years [standard deviation, 9.7 years]; 57 (70.4%) women) answered the questionnaires. Almost all clinicians participating in the study reported that they always or frequently asked patients if they adhered to treatment. Most clinicians think that in 20–50% of patients with asthma and less than 20% of patients with chronic obstructive pulmonary disease, a decrease in medication adherence appears in the first year of treatment. Most clinicians think the main reason for patients with obstructive lung diseases not adhering is patients’ reluctance to be treated regularly. Regarding the impact of the COVID-19 pandemic on patients’ drug adherence, 43.2% of clinicians observed that adherence increased after the start of the pandemic. CONCLUSIONS: Adherence to medication is not at the desired levels in patients with obstructive lung diseases. However, when faced with a serious health threat, such as the COVID-19 pandemic, patients realize the severity of their illness and begin using their treatments more regularly.