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Do not take Glyceryl Trinitrate tablets if the patient: Is allergic (hypersensitive) to glyceryl trinitrate, nitrates or any of the ingredients in the tablet. An allergic reaction may include a rash, itching, difficulty breathing or swelling of the face, lips, throat or tongue (see Description).
Has anaemia.
Has raised pressure in the head including that caused by an accident to the head or bleeding on the brain, causing painful eyes, changes in vision and a bad headache especially behind the eyes.
Has increased pressure in the eye (glaucoma).
Is taking sildenafil (Viagra) or similar medicines (such as tadalafil or vardenafil) used for the treatment of erection problems.
