Trimethobenzamide Overview

Reviewed: October 14, 2013

Trimethobenzamide is a prescription medication used to treat nausea and vomiting that may occur after surgery or due to the stomach flu. Trimethobenzamide belongs to a group of drugs called antihistamines. These work by reducing activity in the area of the brain that causes nausea and vomiting.

This medication comes in capsule form and is typically taken 3 or 4 times a day.

This medication is also available in an injectable form to be given directly into a vein (IV) by a healthcare professional.

Common side effects of trimethobenzamide include blurry vision, diarrhea, disorientation, and dizziness. Do not drive or operate heavy machinery until you know how trimethobenzamide affects you.

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Trimethobenzamide Brand Names

Trimethobenzamide may be found in some form under the following brand names:

Side Effects of Trimethobenzamide

Serious side effects have been reported with trimethobenzamide. See the “Drug Precautions” section.

Common side effects of trimethobenzamide include the following:

  • blurry vision
  • diarrhea
  • disorientation
  • dizziness
  • drowsiness
  • headache

This is not a complete list of trimethobenzamide side effects. Ask your doctor or pharmacist for more information.

Tell your doctor if you have any side effect that bothers you or that does not go away.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.