A previously unreported side effect—serosanguineous bullae—was found in one patient receiving minoxidil. The eruption disappeared with cessation of the drug and reappeared on rechallenge. The question arises whether continuation of minoxidil treatment could have led to vasculitis.
(Arch Intern Med 138:1856-1857, 1978)
Rosenthal T, Teicher A, Swartz J, Boichis H. Minoxidil-Induced Bullous Eruption. Arch Intern Med. 1978;138(12):1856-1857. doi:10.1001/archinte.1978.03630370064027