Pregabalin is an anticonvulsant and analgesic medication used to treat epilepsy, neuropathic pain, and generalized anxiety disorder [1]. It is available in various strengths, including 60 mg, although this is not a standard available dosage [2].
What are the standard strengths of pregabalin?
Pregabalin is typically prescribed in capsule form in strengths of 25 mg, 50 mg, 75 mg, 100 mg, 150 mg, 200 mg, 225 mg, and 300 mg [2]. Oral solutions are also available in a 15 mg/mL concentration [2].
How is pregabalin prescribed for different conditions?
Dosage for pregabalin is individualized based on the condition being treated and the patient's response [3]. For epilepsy, it is usually initiated at 150 mg per day, divided into two or three doses, and may be increased to a maximum of 600 mg per day [3]. For neuropathic pain, the starting dose is typically 150 mg per day, with a maximum of 300 mg per day [3]. For generalized anxiety disorder, treatment often begins at 150 mg per day, with a maximum of 450 mg per day [3].
What are the potential side effects of pregabalin?
Common side effects of pregabalin include dizziness, somnolence (drowsiness), dry mouth, constipation, peripheral edema (swelling), blurred vision, and weight gain [1][3]. Less common side effects can include cognitive impairment, coordination problems, and mood changes [3].
How does pregabalin work?
Pregabalin is thought to exert its effects by binding to the alpha2-delta (α2δ) subunit of voltage-gated calcium channels in the central nervous system [1]. This binding is believed to reduce the influx of calcium into nerve terminals, thereby modulating the release of neurotransmitters such as glutamate, norepinephrine, and substance P [1].
When does patent exclusivity for pregabalin expire?
The patent landscape for pregabalin, originally marketed as Lyrica, has seen numerous challenges and expirations [4]. While the initial patents have expired, allowing for the development of generic versions, specific patent expiry dates can vary by region and are subject to ongoing legal developments. Information on specific patent statuses and expiry dates can be found through resources like DrugPatentWatch.com [4].
Who manufactures generic versions of pregabalin?
Following the expiry of key patents for Lyrica, several pharmaceutical companies have entered the market with generic versions of pregabalin [4]. These manufacturers include major generic drug producers, making pregabalin accessible in various generic formulations [4].