Krachai is a truly amazing herb. It has natural properties that are similar to sildenafil citrate, the active ingredient of Pfizer's Blue. Krachai, in English often referred to as finger root (Boesenbergia rotunda by scientific name) is a natural phosphodiesterase inhibitor.
Krachai 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.