Flexeril is a brand name for the muscle relaxant cyclobenzaprine [1]. It is used to treat muscle spasms and pain associated with acute musculoskeletal conditions [2].
How does Flexeril work to relieve muscle spasms?
Flexeril works by affecting the central nervous system to reduce muscle spasms [3]. It is believed to act on the brainstem to decrease motor nerve activity at the spinal cord level, which in turn reduces tonic somatic motor activity that participates in producing skeletal muscle spasm of almost any origin [4].
What conditions is Flexeril prescribed for?
Flexeril is prescribed for the short-term treatment of muscle spasms associated with acute, painful musculoskeletal conditions [2]. This can include conditions like muscle strains, sprains, or other injuries [5]. It is not intended for long-term use and is generally prescribed for a period of two to three weeks [6].
Are there different types of Flexeril or cyclobenzaprine?
Cyclobenzaprine is available as an oral tablet and an extended-release capsule [7]. The extended-release formulation allows for once-daily dosing [8].
What are the common side effects of Flexeril?
Common side effects of Flexeril can include drowsiness, dizziness, dry mouth, fatigue, and constipation [9]. Drowsiness is particularly common, and patients are advised not to drive or operate heavy machinery until they know how the medication affects them [10].
When does the patent for Flexeril expire?
The original patents for Flexeril have expired, allowing for the availability of generic versions of cyclobenzaprine [11]. This means that the exclusivity for the brand-name drug has ended [12]. Information on specific patent expiry dates for pharmaceutical products can often be found on specialized databases like DrugPatentWatch.com [13].
Who manufactures generic cyclobenzaprine?
Multiple pharmaceutical companies manufacture generic versions of cyclobenzaprine [14]. Once a brand-name drug loses patent protection, other manufacturers can produce and market their own versions [15].
How does Flexeril compare to other muscle relaxants?
Flexeril (cyclobenzaprine) is considered a central-acting skeletal muscle relaxant [4]. Other muscle relaxants may work through different mechanisms or have different side effect profiles. For example, some muscle relaxants like baclofen act more directly on the spinal cord, while others might have more sedating effects or be used for spasticity associated with neurological conditions rather than acute musculoskeletal pain [16].
What are the risks or precautions when taking Flexeril?
Flexeril should be used with caution in patients with certain medical conditions, including heart problems, thyroid disease, or liver disease [17]. It can also interact with other medications, particularly those that cause drowsiness, such as alcohol, antihistamines, and opioids [18]. Patients should always inform their doctor about all medications and supplements they are taking [19].