The dosage of Cenforce 150 mg is different from that of generic Sildenafil Citrate, and you must take it exactly as prescribed by your doctor. You should swallow the whole pill with water and not break it or chew it. It will take time for it to work, and the effects will last for 3-4 hours after you have consumed it. You can take it daily or use it on-demand, depending on your condition.