Zantac OTC Side Effects
What should I watch for?
Tell your doctor or health care professional if your condition does not start to get better or gets worse. You may need to take this medicine for several days as prescribed before your symptoms get better. Finish the full course of tablets prescribed, even if you feel better.
Do not smoke cigarettes or drink alcohol. These increase irritation in your stomach and can lengthen the time it will take for ulcers to heal. Cigarettes and alcohol can also make acid reflux or heartburn worse.
If you get black, tarry stools or vomit up what looks like coffee grounds, call your doctor or health care professional at once. You may have a bleeding ulcer.
This medicine may cause a decrease in vitamin B12. You should make sure that you get enough vitamin B12 while you are taking this medicine. Discuss the foods you eat and the vitamins you take with your health care professional.
Side Effects to watch for
Side effects that you should report to your doctor or health care professional as soon as possible:
- agitation, nervousness, depression, hallucinations
- allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
- breast enlargement in both males and females
- breathing problems
- redness, blistering, peeling or loosening of the skin, including inside the mouth
- unusual bleeding or bruising
- unusually weak or tired
- yellowing of the skin or eyes
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):