Do not take Varplay-20 Tablet if you are allergic to any of its components; if you are taking nitrates (used to treat angina), riociguat (used to treat pulmonary hypertension), medicines used to treat HIV, if you are over 75 years and are taking antifungal medicines; if you have/had severe heart problems or liver problems, kidney dialysis, recently had a heart attack or stroke, low blood pressure, degenerative eye diseases, or non-arteritic ischemic optic neuropathy. Inform your doctor if you have heart problems, irregular heart rhythm, priapism (prolonged erection), sickle cell anaemia, multiple myeloma, leukaemia, epilepsy, deformed penis shape, low levels of potassium in the blood, stomach ulcers, or bleeding disorders. Consult your doctor immediately if you experience decreased vision, loss of vision or colour vision changes whilst taking Varplay-20 Tablet . Varplay-20 Tablet is not intended for use in women and children below 18 years. Varplay-20 Tablet may cause dizziness, so drive with caution.