1 interaction was found for the drugs you selected.
VERAPAMIL in Calan
may interact with CIMETIDINE in Tagamet HB
Cimetidine may block the breakdown of verapamil by the liver. As a result, blood levels of verapamil may become elevated and this could increase the risk for side effects. Potential side effects include dizziness, headache, swelling in the feet and hands, a decrease in blood pressure, and a slow heart beat. Based on the limited amount of information that is now available, this potential interaction does not appear to cause any harmful effects. There are currently no recommendations for change when verapamil and cimetidine are used together. However, to avoid potential problems, make sure your doctor is aware that you are taking these drugs at the same time. You may want to ask your healthcare provider about this potential interaction if you think you are having problems.
This interaction is poorly documented and is considered minor in severity.