Tagamet Side Effects: An Introduction
As with any medicine, there are possible side effects with
Tagamet® (
cimetidine); however, not everyone who takes this drug will experience side effects. In fact, most people tolerate Tagamet well. When people do develop Tagamet side effects, in most cases they are minor, meaning they require no treatment or are easily treated by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with Tagamet. Your healthcare provider can discuss a more complete list of Tagamet side effects with you.)
Common Tagamet Side Effects
Tagamet has been studied thoroughly in clinical trials in which a group of people taking the drug have side effects documented and compared to another group not taking the medicine.
This way, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.
In these studies, the most common side effects of Tagamet included:
- Breast enlargement in men (gynecomastia) -- in up to 4 percent of people (see Cimetidine and Gynecomastia)
- Headaches -- up to 3.5 percent
- Diarrhea -- up to 1 percent
- Dizziness -- up to 1 percent
- Drowsiness -- up to 1 percent.