Product image of Isoptin (Verapamil Hydrochloride) supplied by GNH India

Isoptin

Active Ingredient:
Verapamil Hydrochloride
Origin:
EU

Isoptin (Verapamil Hydrochloride)

Verapamil, the active ingredient in Isoptin, is a calcium channel blocker presented as an oral tablet for oral use. It is employed to manage hypertension, angina pectoris, and certain cardiac arrhythmias, particularly in adult patients requiring rate control or vasodilation.

GNH India supplies Isoptin as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide, adhering to stringent quality standards and providing reliable global distribution.

Manufacturer / TM Owner

Viatris Italia S.R.L.

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Indications & Clinical Uses

Isoptin, a calcium channel blocker, is indicated for several cardiovascular conditions.

  • Hypertension: lowers blood pressure by causing arterial vasodilation and reducing peripheral resistance.
  • Angina pectoris: relieves chest pain by decreasing myocardial oxygen demand through reduced contractility and heart rate.
  • Cardiac arrhythmias (e.g., supraventricular tachycardia): controls abnormal heart rhythms by slowing AV nodal conduction and prolonging refractory period.

How It Works

  • Verapamil blocks L‑type calcium channels in cardiac myocytes and vascular smooth muscle. By inhibiting calcium influx, it reduces myocardial contractility, slows conduction through the atrioventricular node, and promotes vasodilation of arterial vessels, leading to decreased heart rate, lowered cardiac output, and reduced systemic vascular resistance. These actions collectively contribute to its antihypertensive, antianginal, and antiarrhythmic effects.

Side Effects

Verapamil may cause a range of adverse reactions, varying from mild to serious.

Common Side Effects

  • Constipation: reduced gastrointestinal motility.
  • Dizziness: light‑headedness due to lowered blood pressure.
  • Headache: vascular dilation.
  • Nausea: mild gastrointestinal upset.

Serious or Rare Side Effects

  • Severe hypotension: marked blood pressure drop.
  • Bradycardia: abnormally slow heart rate.
  • Heart block: impaired AV nodal conduction.

Precautions & Warnings

When prescribing Isoptin, clinicians should consider several safety measures.

  • Blood pressure monitoring: check regularly during initiation and dose changes.
  • Cardiac function assessment: evaluate for heart failure before use.
  • Drug interactions: review concomitant medications, especially beta‑blockers and digoxin.
  • Renal/hepatic impairment: adjust use cautiously in severe dysfunction.
  • Pregnancy and lactation: use only if benefits outweigh risks.
  • Store at ambient temperature: keep below 25 °C, retain original packaging, protect from moisture.

Avoid Interactions

Verapamil interacts with several medicines; awareness helps prevent adverse events.

Major Interactions (Avoid)

  • Beta‑blockers: additive negative chronotropic effect may cause severe bradycardia.
  • Digoxin: increased risk of AV block.
  • CYP3A4 inhibitors (e.g., ketoconazole): may raise verapamil plasma levels.

Moderate Interactions (Monitor Closely)

  • Diltiazem: combined calcium channel blockade can enhance hypotension.
  • Rifampin: may reduce verapamil concentrations.
  • NSAIDs: may attenuate antihypertensive effect.

Frequently Asked Questions

Isoptin contains verapamil, which is prescribed to treat high blood pressure, relieve chest pain from angina, and manage certain cardiac rhythm disorders such as supraventricular tachycardia. It works by relaxing blood vessels and slowing electrical conduction in the heart, helping to control these cardiovascular conditions.

Verapamil blocks L‑type calcium channels in the heart and arterial smooth muscle. This inhibition reduces calcium entry into cells, leading to decreased myocardial contractility, slower atrioventricular nodal conduction, and dilation of peripheral arteries. The combined effect lowers blood pressure, reduces heart rate, and eases the heart’s oxygen demand.

The appropriate dose of Isoptin is individualized by a qualified prescriber based on the patient’s specific condition, response, and tolerability. Healthcare professionals determine the exact strength, frequency, and duration of therapy, and patients should follow the prescribing information provided by their clinician.

Safety data for verapamil in pregnancy and lactation are limited. It should only be used when the potential benefit to the mother outweighs any possible risk to the fetus or infant. Women who are pregnant, planning pregnancy, or breastfeeding should discuss risks and alternatives with their healthcare provider.

To order Isoptin, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies, and procurement teams worldwide, and will request verification of trade or institutional credentials. The team then replies with pricing, availability, shipping details, and any necessary import documentation.

Isoptin (verapamil) belongs to the non‑dihydropyridine calcium‑channel blocker class, which differs from dihydropyridine agents like amlodipine that primarily cause vasodilation. Compared with beta‑blockers, verapamil provides stronger AV‑node slowing but may have a higher risk of constipation. Choice of therapy depends on the patient’s overall cardiovascular profile and comorbidities.

Isoptin tablets should be stored at ambient temperature, preferably below 25 °C. Keep them in the original container, protect from moisture and direct sunlight, and ensure the packaging remains tightly closed until use. Do not store in the refrigerator or freezer.

Isoptin is taken orally as a tablet. Patients should swallow the tablet whole with a glass of water, and it may be taken with or without food according to the prescriber’s instructions. Consistency in timing each dose helps maintain stable blood levels.

The most serious adverse events associated with Isoptin include severe hypotension, marked bradycardia, and various forms of heart block that can impair cardiac conduction. If patients experience fainting, unusually slow heartbeats, or chest discomfort, they should seek immediate medical attention.

Isoptin is contraindicated in individuals with severe hypotension, advanced atrioventricular block (second‑ or third‑degree) without a pacemaker, cardiogenic shock, or known hypersensitivity to verapamil or any excipients. Patients with uncontrolled heart failure should also avoid this medication unless specifically directed by a specialist.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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