Drug General Information (ID: DDIQFA9CBJ)
Drug Name			Oxytetracycline		Drug Info		Zinc sulfate		Drug Info
Drug Type		Small molecule				Small molecule
Therapeutic Class		Antibiotics				Minerals And Electrolytes
Structure

Mechanism of Oxytetracycline-Zinc sulfate Interaction (Severity Level: Moderate)
Complex formation Click to Show/Hide Mechanism Graph
Drug Name		Oxytetracycline				Zinc sulfate
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 Zinc sulfate due to formation of complexes caused by Oxytetracycline

Recommended Action
Management		Patients receiving an oral tetracycline in combination with zinc-containing products should be advised to separate the times of administration by at least three to four hours. Doxycycline may be an appropriate alternative, since its absorption may not be significantly affected by zinc coadministration.

References
1	Gothoni G, Neuvonen PJ, Mattila M, Hackman R "Iron-tetracycline interaction: effect of time interval between the drugs." Acta Med Scand 191 (1972): 409-11. [PMID: 5031537]
2	Neuvonen PJ "Interactions with the absorption of tetracyclines." Drugs 11 (1976): 45-54. [PMID: 946598]
3	Penttila O, Hurme H, Neuvonen PJ "Effect of zinc sulphate on the absorption of tetracycline and doxycycline in man." Eur J Clin Pharmacol 9 (1975): 131-4. [PMID: 786686]
4	Product Information. Nuzyra (omadacycline). Paratek Pharmaceuticals, Inc., Boston, MA.
5	Product Information. Seysara (sarecycline). Allergan Inc, Irvine, CA.