Nifedipine

Introduction

Nifedipine is a calcium channel blocker (CCB) medication used in the treatment of high blood pressure (hypertension) and is often prescribed as an extended-release form. It works by relaxing and widening the blood vessels, which in turn allows the blood to flow more freely. Nifedipine is also used to treat chest pain (angina) and other conditions caused by coronary artery disease.

Uses

Nifedipine is most often used to treat high blood pressure (hypertension). It is also used to treat chest pain (angina) and other conditions caused by coronary artery disease. Nifedipine may also be used for other conditions as determined by your doctor.

Brand Name	Nifedipine
Type
Weight
Generic	Nifedipine
Manufacturer
Available in	English বাংলা

Mechanism of Action

Nifedipine works by blocking calcium channels in the cells of the blood vessels, resulting in dilation of the vessels. This lowers blood pressure and reduces the workload on the heart. It also improves blood flow to the heart muscle, which helps reduce the pain of angina.

How Long Does It Take to Work?

Nifedipine usually starts working within about 45 minutes. The peak effect is usually seen within 1-2 hours. The effects of nifedipine may last up to 12 hours.

Absorption, Route of Elimination, Dosage, Administration

Nifedipine is absorbed quickly and completely from the gastrointestinal tract. It is then metabolized in the liver and excreted mainly in the urine. The usual recommended starting dose of nifedipine is 10-20mg orally 2-3 times a day. The usual maintenance dose is 20-40mg orally 2-3 times a day. It should be taken with food to reduce side effects. It should be taken exactly as prescribed by your doctor.

Side Effects

Common side effects of nifedipine include nausea, dizziness, headache, constipation, and fluid retention. More serious side effects may include abnormal heart rhythms, low blood pressure, and drug interactions with other medications.

Toxicity

If too much nifedipine is taken, serious toxicity can occur. Signs of overdose include severe dizziness, low blood pressure, slow heart rate, and coma. If an overdose is suspected, seek medical attention immediately.

Precautions

Nifedipine should only be taken under the supervision of a healthcare professional. Make sure to tell your doctor about any other medications you are currently taking. Patients with heart disease, kidney disease, or liver disease may need to be monitored more closely.

Interactions, Disease Interactions, Drug Interactions, Food Interactions

Nifedipine can interact with other medications, such as ACE inhibitors, diuretics, and thiazide-type diuretics. It can also interact with certain foods, such as grapefruit juice, which can increase the effects of nifedipine. It can also interact with certain diseases, such as heart disease, kidney disease, or liver disease.

Pregnancy Use, Lactation Use

Nifedipine is classified as pregnancy category C, which means that it may not be safe for use during pregnancy. Women who are pregnant or may become pregnant should consult their doctor before taking nifedipine. It is not known if nifedipine is excreted in breast milk, therefore it is not recommended to take nifedipine while breastfeeding.

Acute Overdose

An overdose of nifedipine can be dangerous and potentially fatal. Signs of overdose include nausea, vomiting, low blood pressure, slow heart rate, and coma. If an overdose is suspected, seek medical attention immediately.

Contraindication

Nifedipine should not be used by patients with certain conditions, such as severe heart failure, slow heart rate, high potassium levels in the blood (hyperkalemia), or kidney failure. It should also not be used by patients who are allergic to nifedipine or any of its components.

Use Direction

Nifedipine should be taken exactly as prescribed by your doctor. The usual recommended starting dose is 10-20mg orally 2-3 times a day with meals. The usual maintenance dose is 20-40mg orally 2-3 times a day with meals.