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Flexeril is the brand name for cyclobenzaprine and is available as an oral tablet.

Flexeril is available as a 5 mg and 10 mg tablet.

Flexeril is a muscle relaxant indicated along with rest and physical
therapy for relief of muscle spasm associated with acute (short-term), painful
musculoskeletal conditions in adults and children 15 years of age and older.

Flexeril is a muscle relaxant. It works in the brain to help relieve muscle spasms, pain, and tenderness.

Flexeril is typically taken by mouth three times daily for up to 2 or 3 weeks.

Flexeril is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. You should not take this medication if you have taken a monoamine oxidase (MAO) inhibitor within the past 14 days, during the acute recovery phase of a heart attack, inpatients with arrhythmias, heart block or conduction disturbances, or congestive heart failure, or if you have hyperthyroidism.

Common side effects of Flexeril include:

• Drowsiness
• Dry mouth
• Dizziness
• Feeling tired
• Headache

Serious side effects are rare with Flexeril. Contact your healthcare provider immediately if you experience any of the following.

• Severe allergic reaction: hives, trouble breathing, swelling of the face, lips, tongue, or throat
• Serotonin syndrome: fast heart rate, dizziness, sweating, fever, shakiness, muscle stiffness, muscle twitching, confusion, hallucinations, coma
• Seizures
• Abnormal heart rhythm

The following medications may interact with Flexeril:

• MAO Inhibitors – Life-threatening interactions may occur
• Serotonergic Drugs – Serotonin syndrome has been reported
• CNS Depressants – Effects of alcohol, barbiturates, and other CNS depressants may be enhanced
• Tramadol – Seizure risk may be enhanced
• Guanethidine – Antihypertensive effect may be blocked

Merck & Co., Inc.

Flexeril use during pregnancy has not shown an identified a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes. However, you should take with your healthcare provider about the risks of taking Flexeril if you become pregnant.

• Cyclobenzaprine