How long does it take for norethisterone to work sildenafil is applied for the treatment of erectile dysfunction (impotence) in men and pulmonary arterial hypertension. You can assign tramadol in the form of rectal (for introduction into the rectum) candles containing 0.1 g (100 mg), 1 candle up to 4 times per day. When administered intravenously, it has an analgesic effect in 5-10 minutes, when administered orally – in 30-40 minutes. Valid for 3-5 hours Super P-Force cannot be used in patients with allergy to the medication and its components and also in individuals treated with nitrates (such as nitroglycerin). This combination can cause very low blood pressure potentially dangerous to result in a stroke, heart attack, or death. Do not take this medication if you are under 18 y.o.