23 Jul 2019 Drug Information on Azithromycin 3 Day Dose Pack, Azithromycin 5 Day What are the possible side effects of azithromycin? Azithromycin 500 mg oral 681800161 . colchicine;; digoxin;; nelfinavir;; phenytoin;; an antacid that contains aluminum or magnesium--Acid Gone, Gaviscon, Gelusil,...