Cimetidine is a medication that reduces the amount of acid in your stomach. It treats conditions that cause too much stomach acid like heartburn, stomach ulcers and reflux disease. The brand name of this medication is Tagamet HB®. It comes as an oral solution that you can take by mouth.
CIMETIDINE (sye MET i deen) treats heartburn, stomach ulcers, reflux disease, or other conditions that cause too much stomach acid. It works by reducing the amount of acid in the stomach.
This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.
COMMON BRAND NAME(S): Tagamet HB
They need to know if you have any of these conditions:
Take this medication by mouth. Follow the directions on the prescription label. Shake well before using. Use a specially marked spoon or container to measure your medication. Ask your pharmacist if you do not have one. Household spoons are not accurate. If you only take this medication once a day, take it at bedtime. Take your doses at regular intervals. Do not take your medication more often than directed.
Talk to your pediatrician regarding the use of this medication in children. Special care may be needed.
Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.
NOTE: This medicine is only for you. Do not share this medicine with others.
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
Do not take this medication with any of the following:
This medication may also interact with the following:
This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your 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 medication for several days before your symptoms get better. Finish the full course of medication prescribed by your doctor or health care professional even if you feel better.
Do not take aspirin, ibuprofen, or other antiinflammatory medications 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.
This medication may cause a decrease in vitamin B12. You should 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 health care professional.
Side effects that you should report to your care team as soon as possible:
Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
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.
NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.
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Note: Introduction and Additional Common Questions written and medically approved by Cleveland Clinic professionals.