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Zantac - Ranitidine

Bharat Pothuri Medically Reviewed by Dr. Bharat Pothuri, MD, FACG
Brand Name
Zantac
Generic Name
Ranitidine
Drug Class
H2 Receptor Antagonist (H2RA)
Availability
OTC
Manufacturer
Sanofi
Indications
GERD, Peptic Ulcers, Zollinger-Ellison Syndrome
Type
Tablet, Oral Solution, Injection
Doses
150-300 mg twice daily
Route
Oral, IV
Side Effects
Headache, constipation, diarrhea, rare liver enzyme elevation
Interactions
Withdrawn in many markets; interacts with warfarin and others
Overdose
Arrhythmia, hallucinations (especially in elderly).
Missed Dose
Take missed dose ASAP; skip if next dose is near.
Contraindications
Withdrawn – safety concerns
Alternatives
Famotidine, Cimetidine, Nizatidine
Co-Pay Assistance Program
Withdrawn
Patient Assistance Program
Not available

Frequently Asked Questions

What is Ranitidine used for?

Ranitidine is applied in the treatment of heartburn, ulcers, and GERD by lowering stomach acid.

How does Ranitidine work?

The mechanism of action of Ranitidine is the inhibition of histamine receptors in the stomach, which decreases the amount of acid.

What are the side effects of Ranitidine?

The side effects are usually headache, dizziness and stomachache.

Is Ranitidine suitable when on a full stomach?

Yes, Ranitidine may be administered with and without food.

Ranitidine has a long acting time.

Ranitidine will most normally take effect and alleviate symptoms in a matter of an hour after consumption.

Can Ranitidine be used in pregnant women?

The use of ranitidine is usually deemed to be safe during pregnancy and one should take the drug under the supervision of a physician.

What is to be done in the event of omission of a dose Ranitidine?

In case of missing a dose, use it immediately, but not close to the scheduled time of the subsequent dose.

Will Ranitidine take effect with other drugs?

Ranitidine can be interacted with such drugs as warfarin, digoxin and some antifungal medications.

Is it possible to discontinue Ranitidine abruptly?

Always ask your physician permission to stop Ranitidine so as to avoid symptoms reoccurring.

Is Ranitidine applicable in long term therapy?

A healthcare professional should monitor the use of Ranitidine on a long-term basis.