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Nitroglycerin 2.5mg
By Micro Labs Pvt Ltd
Prescription Needed
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Drug Information

What is Nitroglycerin used for?

Nitroglycerin is used for the treatment of chest pain (angina pectoris).

Nitroglycerin may also be prescribed for other conditions as determined by the doctor.

How does Nitroglycerin work?

Nitroglycerin belongs to the class of drugs called vasodilators. The drug acts by dilating the blood vessels and increasing oxygen supply to the heart, which results in the decreased preload and afterload on the heart. Thus, it helps in relieving the chest pain.

How to take Nitroglycerin?

The dosage and the drug form depend on the age, weight and medical condition of an individual. Take Nitroglycerin as prescribed by your doctor.

Swallow the tablet/capsule whole. Do not crush or chew the tablet/capsule.

If you miss a dose of Nitroglycerin, take it as soon as you remember. However, if it is almost time for your next dose, then skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for the missed dose.

The overdose symptoms of Nitroglycerin include the following:

  • Decreased heartbeat
  • Vision impairment
  • Severe nausea
  • Sweating

You must seek immediate medical care if you experience any of the above symptoms.

What are the drugs that interact with Nitroglycerin?

Drugs that interact with Nitroglycerin include the following:

  • Avanafil
  • Epinephrine
  • Lidocaine
  • Prilocaine
  • Sildenafil
  • Sodium nitrite
  • Tadalafil
  • Tizanidine
  • Vardenafil
This is not a comprehensive list of drug interactions. Consult your doctor to know more about other possible drug interactions.

What are the side effects of Nitroglycerin?

The following are the most common side effects of Nitroglycerin:

  • Vomiting
  • Nausea
  • Weakness
  • Dizziness
  • Itching
  • Pale skin

The following are the severe side effects and you may require immediate medical attention:

  • Low blood pressure
  • Difficulty breathing
  • Blurred vision

This is not a complete list of side effects and others may occur. Please consult your doctor to know more about other possible side effects.

What special precautions should be followed while taking Nitroglycerin?

  • Do not drive or operate heavy machinery if Nitroglycerin causes dizziness or blurred vision.
  • Be cautious while taking Nitroglycerin if you have any kidney or liver impairment.
  • Avoid using the medicine if you are allergic to Nitroglycerin or similar drugs.
  • Avoid consumption of alcohol as it may worsen the side effects of Nitroglycerin.
  • Do not exceed the dose more than what is prescribed.
  • Avoid Nitroglycerin during pregnancy or breastfeeding because the safe use of the drug is not yet established.
  • Keep the medication out of reach of children.

You are advised not to take Nitroglycerin if

  • it has passed the expiry date of the medicine printed on the pack.
  • the foil or packaging is torn or shows signs of tampering or there is discolouration.

What should you tell your doctor before taking Nitroglycerin?

  • Tell your doctor if you have any history of heart attack, recent surgery, low blood pressure, cardiomyopathy or frequent stomach pain.
  • Inform the doctor if you are taking any other drugs, OTC medications, herbal products or nutritional supplements.
  • Notify your doctor if you are pregnant or breastfeeding.

Frequently asked questions about Nitroglycerin

  1. Should I follow any special dietary instructions while taking Nitroglycerin?
  2. Yes, it is advised to avoid drinking grapefruit juice and grapefruit while on Nitroglycerin medication.

  3. What are the contraindications of Nitroglycerin?
  4. Nitroglycerin is contraindicated in patients with anaemia, haemodialysis, decreased blood pressure, pericarditis and glaucoma.

  5. Do I need to be monitored for any laboratory parameter while taking Nitroglycerin?
  6. Yes, it is advised to monitor blood pressure, complete blood count while taking Nitroglycerin.

  7. How should Nitroglycerin be stored?
  8. Store Nitroglycerin tablets at room temperature (15 – 30OC). Protect from light, heat, and moisture.


The contents of this website are for informational purposes only and not intended to be a substitute for professional medical advice, diagnosis, or treatment.  Please seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Do not disregard professional medical advice or delay in seeking it because of something you have read on this website.

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