Self-reported COVID-19 prevalence among isotretinoin users vs. non-users: a cross-sectional survey

Aim: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a global pandemic, and effective drug treatments for COVID-19 remain unavailable. Isotretinoin (ISO), a retinoic acid derivative commonly used for severe acne, is a potent down-regulator of ACE2 receptors, which play a key role in the pathophysiology of COVID-19. This study aims to investigate the effect of ISO treatment on COVID-19 infection in patients with acne vulgaris. Materials and Methods: Between January 2021 and April 2021, 520 ISO users with acne vulgaris and 400 controls were included in the study. Data were collected using an electronic questionnaire distributed via social media, e-mail and mobile phones. Results: Among ISO users, 66 (12.7%) had COVID-19 compared to 89 (22.3%) in the control group, indicating a significantly lower infection rate in the ISO group (p