Tetrabenazine — Uses, Dosage, Side Effects & Safety

Drug class: Vesicular monoamine transporter 2 (VMAT2) inhibitor

Overview

Tetrabenazine is a prescription medication used to treat movement disorders, most commonly chorea associated with Huntington’s disease. Chorea is characterized by involuntary, rapid, and unpredictable muscle movements. Tetrabenazine helps reduce these movements, improving daily functioning and quality of life for affected individuals. This medication works by decreasing the amount of certain natural chemicals (monoamines, such as dopamine, serotonin, and norepinephrine) in the brain. By doing so, it helps control abnormal movements. Patients should know that tetrabenazine does not cure Huntington’s disease or other movement disorders, but it can help manage symptoms. Regular follow-up with a healthcare provider is important to monitor for side effects and adjust dosing as needed.

Therapeutic uses

  • Huntington's disease chorea
  • Tardive dyskinesia
  • Tourette's syndrome (off-label)

For related Tetrabenazine guidance, compare Valbenazine and Schizophrenia: Symptoms, Causes, and Evidence-Based Treatments.

Common side effects

  • Sedation
  • Nausea
  • Insomnia
  • Depression
  • Parkinsonism
  • Akathisia
  • Suicidal ideation

Frequently Asked Questions about Tetrabenazine

What is tetrabenazine used for?

Tetrabenazine is primarily used to treat chorea (involuntary movements) associated with Huntington’s disease. It may also be prescribed for other movement disorders as determined by your doctor.

How does tetrabenazine work?

Tetrabenazine works by blocking VMAT2, a protein that helps store certain neurotransmitters (dopamine, serotonin, norepinephrine) in nerve cells. This reduces abnormal movements by lowering the levels of these chemicals in the brain.

Can tetrabenazine cause depression?

Yes, tetrabenazine may increase the risk of depression and suicidal thoughts, especially in people with a history of mental health issues. Regular monitoring by a healthcare provider is essential.

Is tetrabenazine safe during pregnancy or breastfeeding?

The safety of tetrabenazine during pregnancy or breastfeeding is not well established. Discuss with your doctor if you are pregnant, planning to become pregnant, or breastfeeding.

What should I do if I miss a dose?

Take the missed dose as soon as you remember, unless it is almost time for your next dose. Do not take two doses at once.

Are there foods or drinks I should avoid?

Avoid alcohol while taking tetrabenazine, as it can increase drowsiness and other side effects. There are no specific food restrictions.

Can children take tetrabenazine?

Tetrabenazine is not routinely recommended for children, as safety and efficacy have not been established. Use in pediatric patients should be under specialist supervision.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.