This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Drug that does not interferes with antacid: March 2005 
Select and explain. 
A. Tetracyclin, B. Norfloxacin, C. Azithromycin, D. Ranitidine
C: Azithromycin
Answer: C: Azithromycin 
Explanation: Ans. C: Azithromycin Drugs less absorbed when taking antacids include Tetracycline Antifungals Propranolol Captopril Ranitidine Famotidine Fexofenadine Quinolone-Nalidixic acid, Norfloxacin, Ciprofloxacin, Gatifloxacin Iron supplements. Antacids can also potentiate (make stronger) the following drugs Valproic acid Sulfonylureas Quinidine Levodopa Digoxin Phenytoin Carbamazepine Phenobarbitone Metronidazole Warfarin Imipramine Lidocaine