What is GTN Sorbitrate-CR 6.4 Tablet?

A nitrate-based medication used to treat and prevent angina (heart-related chest pain) by relaxing blood vessels, improving blood flow to the heart, and reducing workload.

Uses

• Angina (chest pain due to heart disease)

• Heart failure

• Coronary artery disease

• Hypertensive emergency

• Anal fissure (off-label use)

How It Works

• Relaxes and widens blood vessels → improves oxygen supply to the heart.

• Reduces the heart’s workload.

Dosage & Administration

• Take as prescribed, with or without food, at a fixed time.

• Swallow whole—do not chew, crush, or break.

• Avoid sudden discontinuation (may worsen angina).

• Tolerance risk: Follow dosing schedule strictly to maintain effectiveness.

Side Effects (Common)

• Headache (may be severe; hydrate well, avoid alcohol).

• Dizziness/lightheadedness (rise slowly to prevent falls).

• Blurred vision, fast heartbeat, low blood pressure.

Precautions & Warnings

• Avoid alcohol → Can worsen dizziness/low BP.

• Do NOT take with erectile dysfunction drugs (e.g., sildenafil) or pulmonary hypertension meds → Dangerous BP drop.

• Contraindicated in: Severe anemia, glaucoma (angle-closure), or hypersensitivity to nitrates.

• Driving/Operating Machinery: Unsafe (may cause dizziness/blurred vision).

• Pregnancy/Breastfeeding: Likely safe, but consult a doctor.

• Kidney/Liver Disease: Caution advised; dose adjustment may be needed.

Missed Dose?

• Take ASAP if remembered. If near the next dose, skip the missed dose. Do not double dose.

Storage

• Keep in a cool, dry place away from moisture and light.

Always consult your doctor before starting or stopping this medication.