Tagamet (cimetidine) is a medication used for treatment of an ulcer in the first part of the small intestine. It can also be used to treat gastroesophageal reflux disease (GERD) and conditions where the stomach produces too much acid. It works by decreasing the amount of acid made in the stomach. The Mayo Clinic reports that it may take several days before you feel relief from stomach pain. This medication is to be taken for the full length of the prescription, even if you start to feel better.
Common Side Effects
Common side effects of Tagamet include diarrhea, headaches, dizziness or mental confusion. Tagamet can also cause drowsiness and breast enlargement.
Serious Side Effects
Rare instances of irregular heart beat and low blood pressure have been reported following an administration of Tagamet. Some people report developing psychosis, mood changes or hallucinations. RxList.com reports this effect usually happens in seriously ill patients, and the symptoms recede within three to four days of discontinuing the drug. Other serious side effects reported have been confusion, excitement and nervousness. If you experience any of these side effects, call your doctor immediately.
Contraindications
The Mayo Clinic notes that women who are breast-feeding and take Tagamet may see unwanted side effects in their baby, such as increased excitement and decreased amounts of stomach acid. Taking another medication or stopping the medication while breast-feeding may be necessary. Follow your doctor's instructions. The Mayo Clinic also notes that your doctor should be informed if you have kidney disease, liver disease, phenylketonuria (PKU), prophyria, a weakened immune system, or if you are undergoing treatment for depression or taking blood thinners. Cigarette smoking tends to decrease this drug's effectiveness, and drinking alcohol while taking this medication can lead to increased alcohol levels in the blood.
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