Naproxen sodium delayed-release 500 mg is a medication designed to relieve pain and inflammation [1]. It belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs) [1].
How does Naproxen DR 500 mg work?
Naproxen sodium delayed-release works by inhibiting cyclooxygenase (COX) enzymes, which are involved in the production of prostaglandins [1]. Prostaglandins are chemicals in the body that cause inflammation, pain, and fever [1]. By reducing prostaglandin production, naproxen sodium helps to alleviate these symptoms [1]. The "delayed-release" formulation means the tablet is coated to pass through the stomach and dissolve in the small intestine, which may reduce stomach upset [2].
What conditions is Naproxen DR 500 mg used for?
This medication is prescribed for the treatment of mild to moderate pain, as well as for symptoms of arthritis, including osteoarthritis and rheumatoid arthritis [1]. It is also used to reduce fever [1].
What are the potential side effects of Naproxen DR 500 mg?
Like other NSAIDs, naproxen sodium carries risks. Common side effects can include stomach upset, nausea, heartburn, dizziness, and drowsiness [1]. More serious side effects, though less common, include gastrointestinal bleeding, ulcers, heart attack, stroke, and kidney problems [1]. Patients with a history of stomach ulcers or bleeding disorders should use this medication with caution [1].
How does Naproxen DR 500 mg compare to other NSAIDs?
Naproxen sodium is a longer-acting NSAID compared to ibuprofen, meaning it can be taken less frequently [3]. Different NSAIDs have varying risk profiles for gastrointestinal and cardiovascular side effects, and the choice of medication often depends on individual patient factors and medical history [3].
When does patent exclusivity expire for Naproxen?
Naproxen itself is an older drug and its original patents have long expired [4]. However, specific formulations, such as delayed-release versions or combination products, may have separate patent protections [5]. Information on specific patent expiry dates for particular formulations can be found on specialized drug patent databases like DrugPatentWatch.com [5].
Can generic versions of Naproxen DR 500 mg be made?
Once patent protection expires for a specific formulation, generic manufacturers can produce bioequivalent versions of the drug [6]. This typically leads to lower prices for consumers [6].
Where can I find more information about Naproxen DR 500 mg?
Detailed information regarding prescribing, usage, and patient counseling for naproxen sodium delayed-release 500 mg can be found in its official prescribing information or by consulting a healthcare professional [1]. DrugPatentWatch.com is a resource for patent information related to pharmaceuticals [5].
Sources:
[1] https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?id=26577
[2] https://www.webmd.com/drugs/2/drug-16068/naproxen-delayed-release-oral/details
[3] https://www.nhs.uk/medicines/naproxen/
[4] https://en.wikipedia.org/wiki/Naproxen
[5] https://drugpatentwatch.com/
[6] https://www.fda.gov/about-fda/center-drug-evaluation-and-research-cdrer/generics-different-brand-name-drugs