Do not take this medication with any of the following:
-Cisapride
-Dofetilide
-Pimozide
This medication may also interact with the following:
-Caffeine
-Carbamazepine
-Carmustine
-Delavirdine
-Estrogen or progestin hormones
-Itraconazole
-Ketoconazole
-Medications for irregular heartbeat
-Phenytoin
-Theophylline
-Warfarin

They need to know if you have any of these conditions:
-Blood in your stools (black or tarry stools) or if you have blood in your vomit
-Kidney disease
-Liver disease
-Pain or trouble trying to swallow food
-An unusual or allergic reaction to cimetidine, other medications, foods, dyes, or preservatives
-Pregnant or trying to get pregnant
-Breast-feeding

Tell your care team if your pain does not start to get better or gets worse. You may need to take this medication for several days before your symptoms get better. Finish the full course of tablets prescribed even if you feel better.
Do not take with aspirin, ibuprofen, or other antiinflammatory medications unless directed to do so by your care team. These can make your condition worse.
Do not smoke cigarettes or drink alcohol. These increase irritation in your stomach and can increase the time it will take for your ulcer to heal.
If you get black, tarry stools or vomit up what looks like coffee grounds, call your care team right away. You may have a bleeding ulcer.
This medication may cause a decrease in vitamin B12. Make sure that you get enough vitamin B12 while you are taking this medication. Discuss the foods you eat and the vitamins you take with your care team.

Keep out of the reach of children.
Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from light. Keep container tightly closed. Throw away any unused medication after the expiration date.