Functions | Prolong sex time 5-10 time than before,effective in 72 hours,very helpful to erection,make penis harder and has clean sterilization effect. | Prolong sex time,effective in 6 hours | Prolong sex time,effective in 6 hours |
Comfortable Capability | Not numb,not affect pleasure | Numb,affect pleasure | Bradycardia,Muscle tremors,Convulsions coma,Respiratory depression |
Side effect | no | Cause optic neuritis, dizziness, nausea, fatigue, sinus bradycardia, allergic reaction, etc | Side effects, liver and kidney damage, bleeding, etc. |