Before you start to take it Tell your doctor if you: Have any allergies to any other medicines or any other substances such as foods, preservatives or dyes; Have any other heart or blood vessel problems; Have previously had sudden loss of eyesight in one or both eyes; Have any of the following medical conditions: Diabetes, especially if you also have eye problems; Kidney or liver problems; Leukaemia cancer of the blood cells ; Multiple myeloma a cancer of the bone marrow ; Any disease or deformity of your penis; Any bleeding disorder such as haemophilia; Stomach ulcer; A disease of the blood called sickle cell anaemia; Colour vision problems; Previously experienced sudden decrease or loss of hearing; Are taking or using any other treatment for impotence; Are taking any medicines to treat high blood pressure in the vessels of the lungs pulmonary arterial hypertension including Tracleer bosentan or Revatio which also contains sildenafil. Tell your doctor if you have any other medical conditions.

If you have severe or cystic acne that is not responding to other treatments, your doctor or dermatologist may recommend specialist treatment. These treatments are associated with side effects, including local skin irritation. Your skin specialist will be able to discuss the risks and benefits of these treatments with you, and whether they are suitable for your type of acne. revatio Sometimes severe, untreated acne results in acne scars, including ice-pick scars, boxcar scars and rolling scars.