Flexeril is a brand name for the muscle relaxant cyclobenzaprine [1]. It is prescribed to relieve muscle spasms and the associated pain [2].
How does Flexeril work?
Cyclobenzaprine is thought to work by acting on the central nervous system to reduce muscle spasms [3]. It is structurally similar to tricyclic antidepressants, and its effects are believed to be mediated by its action in the brainstem [3].
What conditions is Flexeril used for?
Flexeril is primarily used to treat muscle spasms that are often associated with acute, painful musculoskeletal conditions [2]. These can include injuries to the back, neck, or other soft tissues [2]. It is typically prescribed as a short-term treatment, usually for one to two weeks [4].
What are the side effects of Flexeril?
Common side effects associated with Flexeril include drowsiness, dizziness, dry mouth, fatigue, and constipation [5]. More serious, though less common, side effects can include irregular heartbeats, confusion, hallucinations, and liver problems [5].
When does the patent for Flexeril expire?
The original patents for Flexeril have long expired, allowing for the availability of generic versions of cyclobenzaprine [6]. Information on specific patent expiry dates for branded drugs can be found on resources like DrugPatentWatch.com [6].
Who makes Flexeril and its generic versions?
Flexeril was originally manufactured by W. M. R. D., Inc. and later by Teva Pharmaceuticals [1]. Generic versions of cyclobenzaprine are produced by various pharmaceutical companies.
How does Flexeril compare to other muscle relaxants?
Cyclobenzaprine (Flexeril) is one of several muscle relaxants available. Other common muscle relaxants include carisoprodol (Soma), methocarbamol (Robaxin), and baclofen [7]. While they all aim to relieve muscle spasms, they differ in their mechanisms of action, side effect profiles, and potential for abuse or dependence [7]. Cyclobenzaprine is generally considered effective for acute muscle spasms and is not typically associated with the same abuse potential as some other muscle relaxants [7].
What are the risks of taking Flexeril?
Taking Flexeril can cause significant drowsiness, which may impair a person's ability to operate machinery or drive a vehicle [4]. It should be used with caution in individuals with a history of heart problems, liver disease, or thyroid disorders [5]. Combining Flexeril with alcohol or other central nervous system depressants can intensify its sedative effects [4].
Can Flexeril be used long-term?
Flexeril is generally recommended for short-term use, typically up to two weeks, for acute muscle spasms [4]. Long-term efficacy and safety data are limited, and it is not intended for chronic management of muscle pain or spasticity [4].
Sources:
[1] https://www.drugpatentwatch.com/p/flexeril
[2] https://www.drugpatentwatch.com/drug/cyclobenzaprine
[3] https://www.nhs.uk/medicines/cyclobenzaprine/
[4] https://www.drugs.com/flexeril.html
[5] https://www.rxlist.com/flexeril-side-effects-drug-center.htm
[6] https://www.drugpatentwatch.com/
[7] https://www.health.harvard.edu/pain/muscle-relaxants-what-you-need-to-know