In garden-variety heartburn, stomach acid moves up into the esophagus and causes irritation. This information does not contain any assurances that this product is safe, effective, or appropriate for you. Only your doctor can determine if it is safe for you to continue taking Tagamet. Dosing The dosage your healthcare provider recommends will vary depending on number of factors, including: Your age The medical condition being treated Other medical conditions you may have Other medications you may be taking. Dilute Tagamet cimetidine hydrochloride Injection, 300 mg, in Sodium Chloride Injection. This wo kann ich kaufen tagamet is supported by recent clinical trials see Clinical Trials-Active Duodenal Ulcer. If you are using nonprescription cimetidine for self-treatment of acid indigestion or heartburn, take tablet by mouth with glass of water as needed.