About Nitroglycerin (glyceryl trinitrate)
Medically reviewed by Dr Khizer Hussain Junaidy, MD Pharmacology, Diabetologist & Bariatric Physician, on 23 Oct 2026.
What it is for
Relieves or prevents chest pain (angina).
How to take it
For chest pain: sit down, put one tablet under the tongue or use one spray. Repeat after 5 minutes if needed, up to 3 times.
Common side effects
- Headache, flushing, dizziness.
Call your doctor if
- Chest pain not relieved after the first dose. Call an ambulance.
Take care
Never take with sildenafil, tadalafil or similar medicines. The BP can fall dangerously.
From our clinic: Keep tablets in the original bottle and replace them as the label advises.