Drug General Information (ID: DDIYDWC1K5)
Drug Name			Azithromycin		Drug Info		Magnesium hydroxide		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Macrolides				Antacids/Laxatives
Structure

Mechanism of Azithromycin-Magnesium hydroxide Interaction (Severity Level: Moderate)
Complex formation Click to Show/Hide Mechanism Graph
Drug Name		Azithromycin				Magnesium hydroxide
Mechanism		Binds to polyvalent cations				Polyvalent cations
Key Mechanism Factor 1
		Factor Name		Chelation
		Factor Description		Chelation is a direct drug interaction that usually involves the formation of dimers or trimers, resulting in larger complexes and poorer absorption.
Mechanism Description		Decreased absorption of Magnesium hydroxide due to formation of complexes caused by Azithromycin

Recommended Action
Management		Azithromycin should be administered at least 1 hour before or 2 hours after antacids.

References
1	Product Information. Zithromax (azithromycin). Pfizer US Pharmaceuticals, New York, NY.