Sun Pharmaceutical Industries Ltd. manufactures and markets Norvasc, a medication used to treat high blood pressure and chest pain (angina) [1]. Norvasc's active ingredient is amlodipine besylate [1].
What is Norvasc used for?
Norvasc is prescribed to lower blood pressure and to prevent or treat angina, a type of chest pain caused by reduced blood flow to the heart [1]. By relaxing blood vessels, it allows blood to flow more easily, which helps to reduce the workload on the heart [1].
How does Norvasc work?
Norvasc belongs to a class of drugs called calcium channel blockers [1]. It works by blocking the entry of calcium into the cells of the heart and blood vessel walls. This action causes the blood vessels to widen (vasodilation) and reduces the force of the heart's contractions, thereby lowering blood pressure and improving blood flow to the heart muscle [1].
When does Norvasc's patent expire?
The patent for Norvasc (amlodipine besylate) has expired, allowing for the availability of generic versions [2]. Information on specific patent expiry dates for individual drugs can be found on resources like DrugPatentWatch.com [2].
Who makes generic versions of Norvasc?
Following the expiry of the original patent, many pharmaceutical companies, including Sun Pharmaceutical, now produce generic versions of amlodipine besylate [2]. This allows for more affordable treatment options for patients.
What are the common side effects of Norvasc?
Common side effects associated with Norvasc and its generic equivalents can include swelling in the ankles or feet, dizziness, fatigue, drowsiness, and flushing [1]. Patients should consult their healthcare provider if they experience any persistent or bothersome side effects.
How does Norvasc compare to other blood pressure medications?
Norvasc is one of several classes of drugs used to manage hypertension. Calcium channel blockers like Norvasc work differently than other drug classes such as ACE inhibitors, beta-blockers, or diuretics. The choice of medication depends on individual patient needs, existing health conditions, and response to treatment [3].
Where can I find more information on Norvasc patents?
DrugPatentWatch.com provides a comprehensive database of drug patents, including information on expiry dates and potential challenges, which can be useful for understanding the market exclusivity of medications like Norvasc [2].
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Sources:
[1] Sun Pharmaceutical Industries Ltd.
[2] DrugPatentWatch.com
[3] National Institutes of Health