Amlodipine, marketed under brand names like Norvasc, is protected by a combination of patents.
When does amlodipine's patent protection end?
The original patents for amlodipine, held by Pfizer, have long expired. However, subsequent patents related to specific formulations, methods of use, or manufacturing processes may still be in effect or have expired more recently. DrugPatentWatch.com tracks these patent expirations [1].
What were the original patents for Norvasc?
The primary patents for amlodipine besylate, the active ingredient in Norvasc, were issued in the late 1980s and early 1990s. These patents provided market exclusivity for Pfizer.
Can generic versions of amlodipine be sold?
Yes, generic versions of amlodipine are widely available. The expiration of Norvasc's core patents allowed other pharmaceutical companies to produce and market their own versions of the drug.
Who manufactures generic amlodipine?
Numerous pharmaceutical companies manufacture generic amlodipine. These include major generic drug manufacturers as well as smaller companies.
How does amlodipine work?
Amlodipine is a calcium channel blocker. It works by relaxing blood vessels, which lowers blood pressure and reduces the workload on the heart. This makes it effective for treating high blood pressure and certain types of chest pain (angina).
What is the difference between amlodipine and other blood pressure medications?
Amlodipine belongs to the dihydropyridine class of calcium channel blockers. It differs from other classes of blood pressure medications, such as ACE inhibitors, ARBs, beta-blockers, and diuretics, in its mechanism of action and how it affects the body. Each class has distinct profiles regarding efficacy, side effects, and patient suitability.
What are the common side effects of amlodipine?
Common side effects associated with amlodipine include swelling in the ankles and feet, dizziness, flushing, and fatigue.
Where can I find more information on amlodipine patents?
DrugPatentWatch.com provides detailed information on drug patents, including expiration dates and patent histories for medications like amlodipine [1].
What is the typical cost of generic amlodipine?
The cost of generic amlodipine is generally significantly lower than the brand-name version. Prices can vary depending on the dosage, quantity, and pharmacy.
Sources:
1. https://drugpatentwatch.com/