Nizagara is issued on prescription by a doctor (general practitioner or specialist) who will have judged the interest of the treatment and the absence of contraindication. Sexual intercourse is in fact a physical activity: you have to make sure you can walk briskly or climb two floors without stopping. In cases of cardiovascular disease, the prescribing physician assesses the potential cardiac risk of sexual activity and may seek the advice of a cardiologist. For on-demand medications (taken before intercourse), the dosage depends on the doctor’s instructions; the frequency of setting of the tablet adapts to the wishes of the patient.