Krachai dam is a truely amazing herb. It has natural properties that are similar to sildenafil citrate, the active ingredient of Pfizer's Blue. Krachai dam, in English often referred to as black ginger (Krachai dam by scientific name) is a natural phosphodiesterase inhibitor.
Krachai dam works like Pfizer's Blue but is more gentle. It can and should be taken on a prolongued basis, twice a day, and not just an hour before intercourse like Pfizer's Blue.
It can also be combined with another Thai herbal, butea superba, which is a proven libido booster.
You are happily invited to check scholar.google.com for scientific literature and clinical trials for both herbals.
We only sell quality products manufactured by Sumatra Pasak Bumi (tongkatali.org).