Aug 12, 2024 · Taking nitroglycerin without heart problems can cause a sudden drop in blood pressure, leading to dizziness, fainting, and other serious side effects. This medication is not meant for casual …

Aug 11, 2025 · Do not take medicines for erectile dysfunction (ED), such as Viagra, Cialis, or Levitra, while you are taking nitroglycerin as the combination may dangerously drop your blood pressure.

Oct 2, 2024 · Nitroglycerin relaxes the blood vessels and increases the supply of oxygen and blood to the heart. Chest pain may occur when your heart does not get enough oxygen and blood.

Nitroglycerin prevents and treats chest pain by relaxing your blood vessels. You should take this medication at the first sign of chest pain or tightness.

Aug 4, 2021 · This is called orthostatic hypotension. It may happen as soon as you take the drug. You should sit down while taking this medication and then stand up slowly.

Jul 28, 2021 · Doctors do not prescribe nitroglycerin to anyone with a history of severe anemia, heart attack occurring on the right side of the heart, or increased pressure in the brain.

Nitroglycerin may not work as well after you have used it for some time or if you have taken many doses. Take the fewest tablets needed to relieve the pain of your attacks.

What happens if you take nitroglycerin and don't need it? Taking more of this drug than you need can lead to tolerance. This means that, over time, the drug may not work as well to treat your chest pain. …

Feb 1, 2026 · This medicine works best if you have a "drug-free" period of time every day when you do not take it. Your doctor will schedule your doses during the day to allow for a drug-free time.

More serious side effects include flushing of the head and neck can occur with nitroglycerin therapy as can an increase in heart rate or palpitations. This can be associated with a drop in blood pressure …