Characteristics: White or off-white crystal powder, odorless, bitter, can't melt in water and ethanol
Functions: This ingredient can be made into a tablet, capsule and beverage.
The dosage for an average adult is 150-180mg for one time.
Works in about 20 minutes when taken on an empty stomach or after a low-fat meal.
Do not drink wine or tea.
Erection lasts less than 30 minutes for some patients.