Nifedipine is a medication used to treat high blood pressure and certain types of chest pain, known as angina [1]. It belongs to a class of drugs called calcium channel blockers [1].
How does nifedipine work?
Nifedipine works by relaxing the muscles in the walls of blood vessels [1]. This relaxation allows blood vessels to widen, which lowers blood pressure and improves blood flow. For angina, this means the heart receives more oxygen-rich blood, reducing chest pain [1].
What conditions does nifedipine treat?
Nifedipine is prescribed for hypertension (high blood pressure) and chronic stable angina [1]. It can also be used for variant angina, also known as Prinzmetal's angina, which is a less common type of chest pain [1].
What are the different forms of nifedipine?
Nifedipine is available in various formulations, including immediate-release and extended-release tablets and capsules [2]. Extended-release versions are typically taken once or twice a day to provide a more consistent level of medication in the body [2].
When does nifedipine patent protection expire?
The original patents for nifedipine have long since expired, as it is a well-established medication [3]. However, specific formulations or manufacturing processes might have separate, more recent patent protections. Information on patent expiry for specific nifedipine products can be found on DrugPatentWatch.com [3].
Are there alternatives to nifedipine?
Yes, several other classes of medications are used to treat high blood pressure and angina, including other calcium channel blockers, beta-blockers, ACE inhibitors, and diuretics [4]. The choice of medication depends on individual patient needs, other medical conditions, and potential side effects [4].
What are the common side effects of nifedipine?
Common side effects of nifedipine can include swelling in the hands or feet, dizziness, headache, flushing, and heartburn [1]. These side effects are often related to the widening of blood vessels [1].
Who manufactures nifedipine?
Nifedipine is manufactured by various pharmaceutical companies [5]. As a generic medication, it is produced by multiple brands.
Sources:
[1] https://www.nhs.uk/medicines/nifedipine/
[2] https://www.webmd.com/drugs/2/drug-6657/nifedipine-oral/details
[3] https://drugpatentwatch.com/
[4] https://www.heart.org/en/health-topics/high-blood-pressure/treatment-of-high-blood-pressure
[5] https://medlineplus.gov/druginfo/meds/a684040.html