Nifopress Retard (Nifedipine)

Nifopress Retard acts on the cardiovascular system to control blood pressure and myocardial oxygen demand.

• Hypertension: lowers systemic arterial pressure and reduces the workload on the heart.
• Chronic stable angina: decreases the frequency and severity of chest pain by improving coronary blood flow.
• Coronary vasospasm: prevents episodic constriction of coronary arteries, helping to avoid transient ischemic attacks.

• Nifedipine selectively blocks L‑type calcium channels in vascular smooth muscle and cardiac myocytes, inhibiting calcium influx. This causes arterial vasodilation, reduces peripheral resistance, and lowers myocardial oxygen consumption, thereby decreasing blood pressure and alleviating anginal symptoms.

Nifopress Retard may be associated with a range of adverse reactions.

Common Side Effects

• Headache: mild to moderate intensity, often transient.
• Flushing: warmth and redness, typically on the face or neck.
• Peripheral edema: swelling of ankles or lower legs.
• Dizziness or light‑headedness, especially on standing.
• Tachycardia: increased heart rate.
• Nausea or abdominal discomfort.

Serious or Rare Side Effects

• Severe hypotension: marked drop in blood pressure requiring medical attention.
• Myocardial infarction: rare occurrence of heart attack.
• Arrhythmias: abnormal heart rhythms, including atrial fibrillation.
• Hepatic dysfunction: elevated liver enzymes or hepatitis.
• Allergic reactions: rash, pruritus, or anaphylaxis.
• Stevens‑Johnson syndrome or toxic epidermal necrolysis.

Before initiating therapy, several safety considerations should be observed.

• Monitor blood pressure: regular measurements to ensure therapeutic effect.
• Assess cardiac status: evaluate for ischemia or heart failure.
• Avoid abrupt discontinuation: taper dose to prevent rebound hypertension.
• Caution in hepatic impairment: dose adjustment may be necessary.
• Pregnancy and lactation: use only if benefits outweigh potential risks.
• Store at ambient temperature: keep in the original pack, protect from moisture and direct sunlight.

Nifopress Retard can interact with several medicines, altering its efficacy or safety profile.

Major Interactions (Avoid)

• Strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole): increase nifedipine plasma levels.
• Concurrent use with other antihypertensives (e.g., beta‑blockers, ACE inhibitors): may cause excessive hypotension.
• Grapefruit juice: can markedly raise drug concentrations.

Moderate Interactions (Monitor Closely):\n- Digoxin: may raise serum digoxin levels, requiring monitoring.

• Simvastatin or other statins metabolised by CYP3A4: increased risk of myopathy.
• Rifampin or other CYP3A4 inducers: may reduce nifedipine effectiveness.
• Diuretics: can potentiate orthostatic hypotension.
• Alcohol: may enhance vasodilatory effects, leading to dizziness.