The Side Effects of Flexeril

Flexeril is a prescription medicine that functions as a muscle relaxant. It is often used in conjunction with physiotherapy and rest in order to lessen muscle spasms and aches that result from muscle injuries, sprains and strains. It is a short-term medicine, and most people use Flexeril for less than three weeks.

As with any type of prescription medication, there are some possible side effects that are associated with Flexeril use.

Common Side Effects

There are some common side effects that are often associated with Flexeril. In general, these side effects are minor and no cause for alarm, as they usually fade away on their own as the body gets used to the medication. However, should they worsen or persist, medical attention might be necessary. These side effects are dry mouth, fatigue, exhaustion, drowsiness, feeling lightheaded, dizziness, blurry vision and constipation.

Severe Side Effects

Some severe side effects are also possible as a result of Flexeril use. In cases of severe side effects, individuals should cease using Flexeril immediately and seek emergency medical assistance. Some of these severe side effects are mood or mental changes (like hallucinations, confusion and disorientation) and problems with urination.

Rare and Serious Side Effects

There are several extremely rare and serious side effects that are linked to use of Flexeril. These severe effects include jaundice, abdomen pain, stomachache, pounding heartbeat, rapid heartbeat, abnormal heartbeat, appetite loss, lingering nausea, throwing up, seizures, coordination loss and darker coloured urine.

Allergic Reactions

Allergic reactions are also serious side effects of Flexeril. Those who experience allergic reactions to the medication must get medical help as soon as possible. Some signs of allergic reaction include itchiness, extreme dizziness, difficulty breathing, skin rash, itchiness and swelling of the tongue, throat or face.


Individuals considering using Flexeril must be very cautious beforehand. It is vital that they inform their physicians of their medical past and of any existing or pre-existing conditions, particularly of glaucoma, urinary retention and moderate liver disease.