Flexeril (Cyclobenzaprine) is a muscle relaxant. It works by blocking nerve impulses (or pain sensations) that are sent to your brain. Flexeril is used to treat pain, tenderness, and limited motion caused by muscle spasms. Usually, patients see improvement after 2-3 weeks using Flexiril. Common side effects include drowsiness, dizziness, and blurred vision. Other side effects are respiratory depression and decreased functionality in various muscles. Long term use has been associated with vision damage. Flexeril may also cause dry mouth. Sucking a hard candy, chewing gum, or melting ice chips in your mouth can provide temporary relief.
Here are the less common or rare side effects - contact your doctor if you notice any of these:
Abnormal heartbeats, abnormal sensations, abnormal thoughts or dreams, aggressive behavior, agitation, anxiety, bloated feeling, blurred vision, confusion, constipation, convulsions, decreased appetite, depressed mood, diarrhea, difficulty falling or staying asleep, difficulty speaking, disorientation, double vision, excitement, fainting, fatigue, fluid retention, gas, hallucinations, headache, heartburn, hepatitis, hives, increased heart rate, indigestion, inflammation of the stomach, itching, lack of coordination, liver diseases, loss of sense of taste, low blood pressure, muscle twitching, nausea, nervousness, palpitations, paranoia, rash, ringing in the ears, severe allergic reaction, stomach and intestinal pain, sweating, swelling of the tongue or face, thirst, tingling in hands or feet, tremors, unpleasant taste in the mouth, urinating more or less than usual, vague feeling of bodily discomfort, vertigo, vomiting, weakness, yellow eyes and skin.
Peace and Blessings