Sildenafil, an ingredient in Suhagra, is a member of the class of medications known as phosphodiesterase type 5 inhibitors. It facilitates blood vessel relaxation, increasing blood flow to the penis. Never take more than the dosage that is advised. You can take it with or without meals. Before beginning Suhagra treatment, let the doctor know everything about your health history. It is not recommended for anyone under the age of 18 to use this medication. Take it all in at once. Never shatter, eat, or crush it. You can take suhagra with or without food, although taking it at a set time is recommended.