Hypersensitivity to glyceryl trinitrate or any of the excipients in the formulation.
Severe anaemia, glaucoma, pregnancy, lactation, hypotension, increased intracranial pressure, idiosyncrasy to glyceryl trinitrate, migraine or recurrent headache, aortic or mitral stenosis, hypertrophic obstructive cardiomyopathy, constrictive pericarditis or pericardial tamponade, postural hypotension, and uncorrected hypovolaemia.
Glyceryl trinitrate should not be coadministered with Viagra (sildenafil citrate), Cialis (tadalafil) or Levitra (vardenafil) as these drugs may potentiate the hypotensive effects of organic nitrates.
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