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Sweet erection alkaloids series---fourth generation phosphodiesterase5 (PDE5) inhibitor for the treatment of the male erectile dysfuntion(ED) . Erectile rapid (within 30 minutes of onset ) , 100-150 mg / time , effectiveness can sustain 16-20 hours . There is small side effects and no “sildenafil” side effects in recommend dosage.The molecular structure and MS2 of the the fourth generation phosphodiesterase5 (PDE5) is completely different from “sildenafil”, “vardenafil”and “Cialis”,can meet and through the world testing. The third generation PDE5 inhibitor tastes no Bitter and completely dissovles in water and alcohol. It’s particularly suitable to be made into wine, medicated liquid, coffee, medicinal granules, chewable tablets, buccal administration, chewing gum and other dosage forms.