Tricylic antidepressants should not be taken with the gastric acid inhibitor cimetidine (Tagamet), since this increases the blood levels of the tricyclic compound.
These include oral contraceptives that contain estrogen, the antiarrhythmia drug mexiletine (Mexitil), and the ulcer drug cimetidine (Tagamet).
For more severe cases of infant acid reflux, pediatricians often prescribe H2-blockers, such as Zantac, Pepcid, or Tagamet.
Common H2 blockers are nizatidine (Axid), ranitidine (Zantac), famotidine (Pepcid), and cimetidine (Tagamet).
The same applies to H2-receptor antagonists, another class of gastric acid inhibitors (Zantac, Tagamet etc).
Cimetidine (Tagamet) increases the effects of diazepam, clonazepam, and clorazepate.