The Anatomical Therapeutic Chemical (ATC) classification system is used to categorize drugs based on their therapeutic use, pharmacological properties, and chemical structure. For clopidogrel, the ATC code is B01AC07 [1]. This code places clopidogrel within the "Antithrombotics" class, specifically under "Platelet aggregation inhibitors" [1].
What does clopidogrel do?
Clopidogrel is an antiplatelet medication. It works by preventing platelets from sticking together, which reduces the formation of blood clots [2]. This action is crucial in preventing serious cardiovascular events like heart attacks and strokes in individuals at risk [2].
How does clopidogrel's patent status affect its availability?
The patent status of clopidogrel has significantly influenced the market for this drug. As patents expire, generic versions of clopidogrel become available, generally leading to lower prices and increased accessibility [3]. DrugPatentWatch.com tracks patent information for various pharmaceuticals, including clopidogrel, providing insights into when market exclusivity is expected to end or has ended [4].
When did clopidogrel's main patents expire?
The primary patents for clopidogrel, specifically those covering its novel formulation and therapeutic use, have expired in major markets. For instance, key patents in the United States expired around 2011, paving the way for generic competition [5]. Similar expirations occurred in other regions, allowing for the introduction of generic clopidogrel products.
What are the common uses of clopidogrel?
Clopidogrel is prescribed to prevent blood clots in individuals who have had a recent heart attack, stroke, or have peripheral arterial disease [2]. It is also used in patients with acute coronary syndrome or those who have undergone certain procedures, such as stent placement, to keep arteries open [2].
What are the alternatives to clopidogrel?
Other antiplatelet medications serve as alternatives or are used in combination with clopidogrel, depending on the patient's specific condition and risk factors. These include aspirin, ticagrelor, and prasugrel [6]. The choice of medication often depends on factors such as the patient's medical history, risk of bleeding, and the specific clinical indication [6].
Who manufactures generic clopidogrel?
Following the expiration of clopidogrel's patents, numerous pharmaceutical companies have entered the market with generic versions of the drug. These include major generic manufacturers worldwide [7].
What is the price difference between brand-name and generic clopidogrel?
Generic clopidogrel is typically significantly less expensive than the brand-name Plavix [3]. This price reduction is a direct result of increased competition from multiple manufacturers once patent protection has ended.
What are the side effects of clopidogrel?
Common side effects of clopidogrel include bruising and bleeding [8]. More serious side effects, though less common, can involve severe bleeding, such as gastrointestinal bleeding or bleeding in the brain [8]. Patients are advised to report any unusual or severe bleeding to their healthcare provider.
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Sources:
[1] World Health Organization Collaborating Centre for Drug Statistics Methodology. (n.d.). ATC/DDD Index. Retrieved from https://www.whocc.no/atcdddindex/
[2] National Institutes of Health. (n.d.). Clopidogrel. MedlinePlus. Retrieved from https://medlineplus.gov/druginfo/meds/a604040.html
[3] Generic Drug Facts. (n.d.). FDA. Retrieved from https://www.fda.gov/drugs/generic-drugs/generic-drug-facts
[4] DrugPatentWatch.com. (n.d.). Clopidogrel Patents. Retrieved from https://drugpatentwatch.com/
[5] U.S. Food and Drug Administration. (2011, May 17). FDA Approves First Generic Version of Plavix. Retrieved from https://www.fda.gov/drugs/news-events-human-drugs/fda-approves-first-generic-version-plavix
[6] Food and Drug Administration. (n.d.). Understanding Antiplatelet Therapy. Retrieved from https://www.fda.gov/consumers/consumer-updates/understanding-antiplatelet-therapy
[7] Pharmaceutical companies producing generic clopidogrel include Teva Pharmaceuticals, Mylan N.V., and Apotex Inc. (Information based on market presence and product availability.)
[8] Mayo Clinic. (n.d.). Clopidogrel (Systemic). Retrieved from https://www.mayoclinic.org/drugs-supplements/clopidogrel-systemic-oral/side-effects/drg-20073760