Placeholder image

Patient HelpBook

Possible Side Effects of Muscle Relaxants

(Return to Table of Contents for Patient HelpBook)

FLEXERIL (cyclobenzaprine), SOMA (carisoprodol), SKELAXIN (metaxalone), and NORFLEX are commonly used muscle relaxants. These should generally not be used in patients with a history of urinary retention or glaucoma. If you have urinary retention or glaucoma, please call this to the attention of your physician.

Possible Side Effects of Muscle Relaxants

FLEXERIL may impair mental and physical abilities required for driving or operating hazardous machinery. FLEXERIL should not be used with alcohol.

FLEXERIL may cause drowsiness, dry mouth and dizziness. Fatigue, nausea, constipation, dyspepsia, unpleasant taste in the mouth, blurred vision, headache, nervousness and confusion may also be caused by FLEXERIL. These symptoms may be worse for elderly individuals.

Concluding Guidelines

It is important to avoid alcohol while using any of the above medications (with the exception of Nonsteroidal Anti-inflammatory Medications).

While you are taking narcotic pain medications, it is imperative that you do not drive a vehicle.

If you feel that you are having a reaction to your medication, contact your physician. If you have been using any medication longer than six months, ask you physician if you should have blood tests performed.


See links below for possible side effects of other classes of drugs:

Narcotic pain medication

Anti-seizure medications, also known as anticonvulsants


Nonsteroidal anti-inflammatory agents


Muscle relaxants


Contact Us to Request an Appointment