Vitamin C Drug Interactions

A number of medicines may interact with vitamin C. Drug interactions may occur if vitamin C is taken together with protease inhibitors, estrogens, warfarin, and aluminum products. These vitamin C interactions can increase your risk of developing side effects or reduce the effectiveness of the medications, so be sure to talk to your healthcare provider before using any other drugs with the vitamin.

Vitamin C Supplements

An Introduction to Vitamin C Drug Interactions

Vitamin C can potentially interact with a few different medicines. Some of the medicines that may lead to vitamin C drug interactions include:

Aluminum products (including many antacids), such as Mylanta^®
Chemotherapy
Estrogens, including hormone replacement therapy (HRT) and hormonal contraceptives (such as birth control pills)
Protease inhibitors, such as:

Warfarin (Coumadin^®, Jantoven^®).

Vitamin C Interactions Explained

The following sections explain in detail the potentially negative interactions that can occur when vitamin C is combined with any of the drugs listed above.

(Vitamin C Drug Interactions Continued: Page 2)