PDE5A and COVID-19: The risk of COVID-19 diagnosis did not differ between alpha-1 blocker and 5ARI/PDE5 users in any of the data sources, with PS-matched calibrated HR of 0.99 (95% CI 0.71–1.36) in SIDIAP, 1.03 (0.83–1.28) in VA, 1.04 (0.90–1.21) in OpenClaims, 0.75 (0.51–1.11) in Optum DOD, and 1.79 (0.46–6.92) in Optum EHR.