ranitidine (generic name)

Wal-Zan (brand name)

It is used to treat stomach or intestinal ulcers
(ra NYE te deen)
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What is this medicine?

RANITIDINE (ra NYE te deen) is a type of antihistamine that blocks the release of stomach acid. It is used to treat stomach or intestinal ulcers. It can relieve ulcer pain and discomfort, and the heartburn from acid reflux.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • kidney disease
  • liver disease
  • porphyria
  • an unusual or allergic reaction to ranitidine, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

How should I use this medicine?

Take this medicine by mouth. Follow the directions on the prescription label. Use a specially marked spoon or container to measure each dose. Ask your pharmacist if you do not have one. Household spoons are not accurate. If you only take this medicine once a day, take it at bedtime. Do not take your medicine more often than directed. Do not stop taking except on your doctor's advice.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medicine?

  • atazanavir
  • delavirdine
  • gefitinib
  • glipizide
  • ketoconazole
  • midazolam
  • procainamide
  • propantheline
  • triazolam
  • warfarin

What should I watch for while using this medicine?

Tell your doctor or health care professional if your condition does not start to get better or if they get worse. You may need to take this medicine for several days before your symptoms get 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 need to take an antacid you should take it at least 1 hour before or 1 hour after this medicine. This medicine will not be as effective if taken at the same time as an antacid.

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.

What side effects may I notice from receiving this medicine?

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
  • vomiting
  • 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):

  • constipation or diarrhea
  • dizziness
  • headache
  • nausea

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 4 and 25 degrees C (46 and 77 degrees F). Do not freeze. Protect from light and moisture. Keep container tightly closed. Throw away any unused medicine after the expiration date.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Last Updated: July 28, 2009
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