Skip to main content

Nitrogard Side Effects

Generic name: nitroglycerin

Medically reviewed by Drugs.com. Last updated on Feb 29, 2024.

Note: This document contains side effect information about nitroglycerin. Some dosage forms listed on this page may not apply to the brand name Nitrogard.

Applies to nitroglycerin: capsule extended release, packet, spray, tablet. Other dosage forms:

Serious side effects of Nitrogard

Along with its needed effects, nitroglycerin (the active ingredient contained in Nitrogard) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking nitroglycerin:

Less common

Rare

Incidence not known

Get emergency help immediately if any of the following symptoms of overdose occur while taking nitroglycerin:

Symptoms of overdose

Other side effects of Nitrogard

Some side effects of nitroglycerin may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

For Healthcare Professionals

Applies to nitroglycerin: buccal tablet extended release, intravenous solution, oral capsule extended release, rectal ointment, sublingual powder, sublingual spray, sublingual tablet, transdermal film extended release, transdermal ointment.

General

The most common side effect is headache.[Ref]

Nervous system

Very common (10% or more): Headache (up to 64%)

Common (1% to 10%): Dizziness, lightheadedness, syncope, vertigo, drowsiness

Rare (0.1% to 0.01%): Severe and prolonged headache

Very rare (less than 0.01%): Cerebral ischemia

Frequency not reported: Faintness, somnolence[Ref]

Cardiovascular

Common (1% to 10%): Hypotension, angina increased, paradoxical bradycardia, tachycardia, orthostatic hypotension, blood pressure decreased, facial flushing

Uncommon (0.1 to 1%): Circulatory collapse

Rare (less than 0.1%): Bradycardia, cyanosis, flushing, heart rate increase

Frequency not reported: Crescendo angina, rebound hypertension, palpitations, hypertension, decreased arterial oxygen tension, severe arterial hypotension with bradycardia, transient flushing[Ref]

Gastrointestinal

Common (1% to 10%): Nausea, vomiting

Rare (0.01% to 0.1%): Dry mouth

Very rare (less than 0.01%): Heartburn, halitosis

Frequency not reported: Abdominal pain, retching, lip and tongue swelling[Ref]

Dermatologic

Uncommon (0.1% to 1%): Dermatitis contact, erythema, pruritus, burning, irritation, eczema, urticaria

Rare (0.01 to 0.1%): Allergic skin reactions, rash

Very rare (less than 0.01%): Exfoliative dermatitis, drug rash

Frequency not reported: Cutaneous flushing, diaphoresis, angioedema

Postmarketing reports: Rash generalized[Ref]

Other

Common (1% to 10%): Asthenia, weakness

Frequency not reported: Retrosternal discomfort[Ref]

Hypersensitivity

Rare (less than 0.1%): Hypersensitivity reactions, anaphylaxis

Frequency not reported: Allergic reaction, anaphylactoid reaction[Ref]

Psychiatric

Common (1% to 10%): Restlessness

Frequency not reported: Apprehension[Ref]

Respiratory

Very rare (less than 0.01%): Impairment of respiration

Frequency not reported: Hypoxemia, dyspnea[Ref]

Hematologic

Very rare (less than 0.01%): Methemoglobinemia[Ref]

Ocular

Rare (less than 0.1%): Blurred vision

Frequency not reported: Increased ocular pressure[Ref]

Musculoskeletal

Frequency not reported: Muscle twitching[Ref]

Frequently asked questions

References

1. Product Information. Tridil (nitroglycerin). DuPont Pharmaceuticals. 2002;PROD.

2. Product Information. Nitrostat (nitroglycerin). Parke-Davis. 2002;PROD.

3. Product Information. Nitrolingual (nitroglycerin). First Horizon Pharmaceutical Corporation. 2004.

4. Cerner Multum, Inc. UK Summary of Product Characteristics.

5. Cerner Multum, Inc. Australian Product Information.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.