The recommended adult dose of cimetidine depends on the condition being treated.
When treating duodenal or gastric ulcers, the dose ranges from 800 mg to 1,200 mg daily, in divided doses. It is usually taken for 4 to 6 weeks, to ensure that the ulcer has healed.
To prevent recurrent ulcers, the dose ranges from 400 mg to 600 mg. If prevention is needed, this dose should be continued for 6 to 12 months.
The recommended dose of cimetidine to treat ulcers caused by anti-inflammatory medications is 800 mg daily, either as 400 mg taken twice a day or 800 mg taken at bedtime. If the anti-inflammatory is not stopped, the cimetidine may be continued as 400 mg at bedtime.
To treat gastroesophageal reflux disease (GERD), the recommended dose is 1,200 mg daily in divided doses.
To reduce the amount of stomach acid produced in conditions that cause over secretion, the dose should be started at 300 mg taken 4 times a day, but may be increased to control symptoms to a maximum of 2,400 mg daily.
Many things can affect the dose of a medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.
Cimetidine can be taken with or without food.
It is important to take this medication exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.
Store Pms Cimetidine at room temperature, protect it from light and moisture, and keep it out of the reach of children.
Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.