Cyclobenzaprine (Systemic)

Brand Names : Flexeril

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

The following side effects may mean that you are having a serious allergic reaction to the medicine. Get emergency help right away if any of them occur :

Rare

Changes in the skin color of the face; fast or irregular breathing; large swellings that look like hives on the face, eyelids, mouth, lips, and/or tongue; puffiness or swelling of the eyelids or the area around the eyes; shortness of breath, troubled breathing, tightness in chest, and/or wheezing; skin rash, hives, or itching

Also, check with your doctor immediately if any of the following side effects occur:

Rare

Fainting

Symptoms of overdose

Convulsions (seizures); drowsiness (severe); dry, hot, flushed skin; fast or irregular heartbeat; hallucinations (seeing, hearing, or feeling things that are not there); increase or decrease in body temperature; troubled breathing; unexplained muscle stiffness; unusual nervousness or restlessness (severe); vomiting (occurring together with other symptoms of overdose)

Also, check with your doctor as soon as possible if any of the following side effects occur:

Rare

Clumsiness or unsteadiness; confusion; mental depression or other mood or mental changes; problems in urinating; ringing or buzzing in the ears; skin rash, hives, or itching occurring without other symptoms of an allergic reaction listed above; unusual thoughts or dreams; yellow eyes or skin

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Blurred vision; dizziness or lightheadedness; drowsiness; dryness of mouth

Less common or rare

Bloated feeling or gas, indigestion, nausea or vomiting, or stomach cramps or pain; constipation; diarrhea; excitement or nervousness; frequent urination; general feeling of discomfort or illness; headache; muscle twitching; numbness, tingling, pain, or weakness in hands or feet; pounding heartbeat; problems in speaking; trembling; trouble in sleeping; unpleasant taste or other taste changes; unusual muscle weakness; unusual tiredness

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.