What are the five kinds of medicated smoke, and how long is the smoking pipe for them?

Detailed answer

The bore should let an urad grain pass. The oleating and prayogika smokes are drawn through mouth and nose, the purgative smoke through the nose and the emetic and cough-relieving smokes through the mouth only, and smoke is always let out through the mouth. The prayogika smoke is used until tears come to the eyes, the others until the doshas come out; excessive smoking is said to cause ringing in the ears, headache, weak sight, loss of taste, burning and thirst.