What should I watch for while using this medicine?
Tell your doctor or health care professional if your pain does not start to get better or gets worse. You may need to take this medicine for several days before your symptoms get better. Finish the full course of tablets prescribed by your doctor or health care professional even if you feel better.
Do not take with aspirin, ibuprofen, or other antiinflammatory medicines unless directed to do so by your health care professional. 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 doctor or health care professional right away. You may have a bleeding ulcer.
If you need to take an antacid you should take it at least 1 hour before or 1 hour after cimetidine. This medicine will not work as well if taken at the same time as an antacid.
What side effects may I notice from receiving this medicine?
Side effects that you should report to your doctor or health care professional as soon as possible: