OverviewDosageSide EffectsInteractionsHalf-Life

Generic Name: Ranitidine hydrochloride

Brands: Zantac

Class: H2 blocker

Availability: prescription and nonprescription strengths

Molecular Formula: C13H22N4O3S

Substance UNII: 884KT10YB7

What is Ranitidine?

Ranitidine (Zantac) is an H2 blocker. It is often sold under the trade name(s) Zantac.

What is Ranitidine Used For?

Ranitidine reduces stomach acid, so it benefits those with ulcers or that have a history of them. It is also for the treatment of excess stomach acid that may lead to ulcers from forming (Ex. Gastroesophageal reflux disease or GERD) .  

How Does Ranitidine Work?

Ranitidine inhibits certain chemicals to reduce stomach acid production. 

How Long Does it Take for Ranitidine to Work?

Relief generally comes in an hour or two. 

Do Not Use Ranitidine If:

There are several situations where this medication may not be the right choice for you. According to the FDA, the following should not use ranitidine:

  • Hypersensitivity to ranitidine hydrochloride or any other ingredients in the medication

Please note that this list may not be complete, and there may be other situations where the use of this drug is not advisable.

Disclaimer: this article does not constitute or replace medical advice. If you have an emergency or a serious medical question, please contact a medical professional or call 911 immediately. To see our full medical disclaimer, visit our Terms of Use page.


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