Vamana is a directed emesis, which removes the gathered poisons through regurgitating. The best opportunity to rehearse is during pre-summer or late-spring (Kapha inciting time) and near the full moon when the water component is high, one day after snehana and svedhana, after a decent rest, after food is processed, or after dawn — 6:00 to 9:00 or 10:00 a.m. (Kapha time). https://www.quora.com/profile/Pathyasathi-1