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(mephobarbital) Tablets, USP


Mephobarbital, 5-Ethyl-1-methyl-5-phenylbarbituric acid, is a babiturate with sedative, hypnotic, and anticonvulsant properties. It occurs as a white, nearly odorless, tasteless powder and is slightly soluble in water and in alcohol.

MEBARAL (mephobarbital) is available as tablets for oral administration. The structural formula is:

MEBARAL (mephobarbital) Structural Formula Illustration

Inactive Ingredients: Lactose, Starch, Stearic Acid, Talc.

What are the possible side effects of mephobarbital (Mebaral)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

  • confusion, hallucinations;
  • slow heart rate; or
  • feeling like you might pass out.

Less serious side effects may include:

  • dizziness;
  • memory or thinking problems;
  • feeling nervous or agitated;
  • nausea, vomiting; or
  • headache.

This is not a complete list of side...

Read All Potential Side Effects and See Pictures of Mebaral »

What are the precautions when taking mephobarbital (Mebaral)?

Consult your...

Read All Potential Precautions of Mebaral »

Last reviewed on RxList: 11/17/2008
This monograph has been modified to include the generic and brand name in many instances.

Mebaral - User Reviews

Mebaral User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Mebaral sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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