See the DrugPatentWatch profile for Nifedipine
Nifedipine's original patent was filed in 1962 [1].
When does nifedipine patent exclusivity expire?
The initial patent for nifedipine, filed in 1962, has long since expired [1]. This means the compound itself is no longer protected by that original patent. However, pharmaceutical companies often develop new formulations, delivery methods, or combinations of existing drugs that can lead to subsequent patents.
What types of nifedipine products are available?
Nifedipine is available in various formulations, including extended-release tablets and capsules. These different formulations are designed to control how the medication is released into the body over time.
Can generic versions of nifedipine be sold?
Due to the expiration of its primary patent, generic versions of nifedipine are available. The availability and launch of generic versions are typically facilitated by patent expiry, allowing other manufacturers to produce and market their own versions of the drug.
Who makes nifedipine?
Nifedipine is manufactured by multiple pharmaceutical companies globally, including both the originators of specific formulations and generic drug manufacturers. Information on specific manufacturers and their products can often be found through drug databases and regulatory agency listings. DrugPatentWatch.com monitors patent and exclusivity information for pharmaceuticals, which can provide insights into the landscape of nifedipine products and their market status [2].
What is nifedipine used for?
Nifedipine is a calcium channel blocker used to treat high blood pressure (hypertension) and angina (chest pain) [3]. It works by relaxing the muscles in the heart and blood vessels, which lowers blood pressure and allows more blood and oxygen to reach the heart.
What are the risks and side effects of nifedipine?
Common side effects of nifedipine can include dizziness, headache, flushing, and peripheral edema (swelling in the ankles and feet) [4]. Less common but more serious side effects can also occur. Patients should consult their healthcare provider for a complete list of potential risks and side effects.
How does nifedipine work in the body?
Nifedipine is a dihydropyridine calcium channel blocker. It blocks the influx of calcium ions into vascular smooth muscle and myocardial cells. By inhibiting calcium entry, it leads to vasodilation (widening of blood vessels), which reduces peripheral resistance and consequently lowers blood pressure. In the heart, it can also reduce the heart's workload.
Are there alternatives to nifedipine for treating high blood pressure?
Yes, there are several classes of medications used to treat high blood pressure, including ACE inhibitors, angiotensin II receptor blockers (ARBs), beta-blockers, and diuretics. The choice of medication depends on individual patient factors, other medical conditions, and physician recommendations.
Sources:
[1] https://www.drugpatentwatch.com/
[2] https://www.drugpatentwatch.com/drug/nifedipine
[3] https://www.nhs.uk/medicines/nifedipine/
[4] https://www.nhs.uk/medicines/nifedipine/side-effects-of-nifedipine/