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
[{'content': 'Antacid interfere with absorption of all of the following except: \nSelect and explain. \nA. Ketoconazole, B. Azithromycin, C. Oxytetracycline, D. Ofloxacin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ketoconazole dissolves at low pH: gastric acid is needed for its absorption.Therefore antacid interfere with its absorption.\nTetracyclines have chelating property- form insoluble and unabsorbable complexes with calcium and other metals. Milk, iron preparations, nonsystemic antacids and sucralfate reduce their absorption.\xa0 Administration of these substances and tetracyclines should be staggered, if they cannot be avoided altogether.\nAzithromycin: The improved pharmacokinetic properties are acid-stability, rapid oral absorption (from empty stomach), larger tissue distribution and intracellular penetration.\nReference: Essentials of Medical Pharmacology Eighth Edition KD\xa0TRIPATHI\xa0page no 21,786,763,804', 'role': 'assistant'}]