Flexeril (Cyclobenzaprine HCl)
What is Cyclobenzaprine used for?
Cyclobenzaprine hydrochloride (Flexeril), along with physical therapy, is used to relieve pain, cramping, and tightness associated with strains, sprains, spasms or other muscle injuries. It relieves muscle spasms of local origin, but is not effective in spasms which originate from diseases in the brain or spinal cord.
Off-label uses include fibromyalgia (a condition that involves aches, stiffness, and fatigue), neck or back pain, and headaches.
Cyclobenzaprine is used short-term, usually for 2 to 3 weeks. It provides quick and lasting symptom relief.
How long does it take for Cyclobenzaprine to work?
It takes from 30 minutes to 1 hour for muscle relaxation to be achieved.
How long does Cyclobenzaprine last?
The duration of action ranges from 12 to 24 hours. The half-life of cyclobenzaprine is about 18 hours, so it is eliminated quite slowly. It usually takes 4-5 days to leave the system.
Is Cyclobenzaprine addictive?
Cyclobenzaprine is not classified as a controlled substance in the United States, and is therefore considered non-addictive.
Last updated: February, 2015
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