Niguldipine

Chemical structure of Niguldipine

Niguldipine is a calcium channel blocker that belongs to the dihydropyridine class of medications. It is primarily used in the management of hypertension and angina pectoris. As a calcium channel blocker, niguldipine works by inhibiting the influx of calcium ions through L-type calcium channels, which are found in the smooth muscle cells of the vascular system and the myocardium.

Mechanism of Action

Niguldipine exerts its effects by selectively blocking L-type calcium channels. These channels are responsible for the influx of calcium ions into cells, which is a critical step in the contraction of smooth muscle and cardiac muscle. By inhibiting these channels, niguldipine causes relaxation of vascular smooth muscle, leading to vasodilation and a subsequent decrease in blood pressure. This action also reduces the workload on the heart, making it effective in treating angina.

Pharmacokinetics

Niguldipine is administered orally and is well absorbed from the gastrointestinal tract. It undergoes extensive first-pass metabolism in the liver, which affects its bioavailability. The drug is highly protein-bound in the bloodstream and is metabolized primarily by the cytochrome P450 enzyme system. The metabolites are excreted in the urine and feces.

Clinical Uses

Niguldipine is used in the treatment of:

• Hypertension: By lowering blood pressure, niguldipine helps prevent complications such as stroke, myocardial infarction, and heart failure.
• Angina pectoris: It alleviates chest pain by reducing the oxygen demand of the heart and improving blood flow to the myocardium.

Side Effects

Common side effects of niguldipine include:

• Headache
• Dizziness
• Flushing
• Peripheral edema
• Nausea

Less common but serious side effects may include:

• Hypotension
• Bradycardia
• Heart block

Related Pages

• Calcium channel blocker
• Hypertension
• Angina pectoris
• Dihydropyridine