Kamagra Online is used to treat erectile dysfunction in men. This drug used to treat ED is also used to treat pulmonary arterial hypertension. This medicine contains an ingredient called sildenafil which helps in increasing the blood flow to the prostate tissue in men. You can take this medicine before or after food. The effect of this medicine lasts for 4 to 6 hours. Take this medicine as advised by the doctor. You should take this medicine with water but do not break or chew the medicine.