Sildenafil citrate

Purity: Larger than 99.8%

Characteristics: White or off-white crystal powder, odorless, bitter, can't melt in water and ethanol

Functions: This ingredients can be made into tablet, capsule and beverage. The dosage for an adult is 150-180mg for one time, which based on the individual character. It can work best on an empty stomach or after eating a low-fat meal. Do not drink wine or tea. It can work in twenty minutes at the soonest. The erection period is less than thirty mins for some patients.