Side Effects
Drug information provided by: Merative, Micromedex®
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor as soon as possible if any of the following side effects occur:
Rare
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Abdominal pain
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back, leg, or stomach pain
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bleeding or crusting sores on lips
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blistering, burning, redness, scaling, or tenderness of skin
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blisters on palms of hands and soles of feet
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changes in vision or blurred vision
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confusion
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coughing or difficulty in swallowing
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dark-colored urine
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dizziness
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fainting
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fast, pounding, or irregular heartbeat
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fever and/or chills
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flu-like symptoms
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general feeling of discomfort or illness
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hives
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inflammation of blood vessels
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joint pain
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light-colored stools
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mood or mental changes, including anxiety, agitation, confusion, hallucinations (seeing, hearing, or feeling things that are not there), mental depression, nervousness, or severe mental illness
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muscle cramps or aches
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nausea, vomiting, or loss of appetite
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pain
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peeling or sloughing of skin
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red or irritated eyes
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shortness of breath
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skin rash or itching
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slow heartbeat
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sore throat
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sores, ulcers, or white spots on lips, in mouth, or on genitals
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sudden difficult breathing
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swelling of face, lips, mouth, tongue, or eyelids
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swelling of hands or feet
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swollen or painful glands
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tightness in chest
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troubled breathing
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unusual bleeding or bruising
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unusual tiredness or weakness
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unusually slow or irregular breathing
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wheezing
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yellow eyes or skin
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Less common or rare
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Constipation
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decrease in sexual desire
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decreased sexual ability (especially in patients with Zollinger-Ellison disease who have received high doses of cimetidine for at least 1 year)
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diarrhea
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difficult urination
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dizziness
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drowsiness
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dryness of mouth or skin
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headache
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increased or decreased urination
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increased sweating
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loss of hair
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ringing or buzzing in ears
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runny nose
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swelling of breasts or breast soreness in females and males
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trouble in sleeping
Not all of the side effects listed above have been reported for each of these medicines, but they have been reported for at least one of them. All of the H2-blockers are similar, so any of the above side effects may occur with any of these medicines.
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
Portions of this document last updated: Aug. 01, 2024
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