Is norethisterone free on prescription the main component of Fildena is Sildenafil. Inform your doctor if you have hypotension or hypertension, cardiac failure, coronary artery disease, deformations of the penis, sickle-cell anaemia, multiple myeloma, leukaemia, retinitis pigmentosa, and also a history of cardiac dysfunction, myocardial infarction, stroke arrhythmia, life-threatening arrhythmia, cardiovascular problems, allergies. Do not take Super P-Force together with other ED medication. Viagra is contraindicated in patients taking another medicine to treat impotence or using a nitrate drug for chest pain or heart problems. This medicine should not be taken by women and children as well as in patients with a known hypersensitivity to any component of the tablet.