Flexeril Side Effects

Although most people do not experience any problems while taking Flexeril, side effects are possible. Clinical trials have shown that the most common side effects of Flexeril include drowsiness, a dry mouth, and dizziness. In most cases, Flexeril side effects are easily treated. However, you should contact your healthcare provider if you develop more serious side effects, such as seizures, depression, or hallucinations.

 

An Introduction to Flexeril Side Effects

As with any medicine, side effects are possible with Flexeril® (cyclobenzaprine hydrochloride). However, not everyone who takes the medication will experience side effects. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are easily treated by you or your healthcare provider.
 
(This article covers many, but not all, of the possible side effects with Flexeril. Your healthcare provider can discuss a more complete list of Flexeril side effects with you.)
 

Common Flexeril Side Effects

Flexeril has been studied thoroughly in clinical trials. In these studies, the side effects that occur in a group of people taking the drug are documented and then compared to the side effects that occur in another group of people not taking the medicine. As a result, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.
 
In these studies, the most common Flexeril side effects included:
 
  • Drowsiness -- in up to 39 percent of people
  • Dry mouth -- up to 32 percent (see Flexeril and Dry Mouth)
  • Dizziness -- up to 11 percent.
     
Some other common Flexeril side effects (occurring in 1 to 3 percent of people) included:
 
  • Fatigue or tiredness
  • Weakness
  • Nausea
  • Constipation
  • Indigestion or heartburn
  • Unpleasant taste
  • Blurred vision
  • Nervousness
  • Confusion.
     
(Flexeril Side Effects Continued: Page 2)
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;