Baclofen: Uses & Side effects

Baclofen is a muscle relaxer and an antispasmodic agent.

Baclofen is used to treat muscle symptoms, such as spasm, pain and stiffness. It is caused by multiple sclerosis, spinal cord injuries, or other spinal cord disorders. It is given intrathecally (directly into the spinal cord) or orally (by mouth).

Important information

Do not use baclofen at a time when you need muscle tone for safe balance and movement during certain activities. Do not drive or operate heavy machinery until you know how baclofen affects you.

Do not stop using baclofen suddenly, or you could have unpleasant withdrawal symptoms.

Side effects

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

Call your doctor at once if you have:

  • weak or shallow breathing;
  • confusion, hallucinations; or
  • a seizure (convulsions).

Common baclofen side effects may include:

  • drowsiness, dizziness, weakness, tired feeling;
  • headache;
  • sleep problems (insomnia);
  • nausea, constipation; or
  • urinating more often than usual.


Keywords: baclofen.

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.