उष्णं तीक्ष्णं सरं स्निग्धं रूक्षं सूक्ष्मं द्रवं स्थिरम्| द्रव्यं गुरु च यत् प्रायस्तद्धि स्वेदनमुच्यते ||१६||
The drug or substance that is used for swedana (sudation) therapy possesses hot, acute, flowing (unstable), unctuous, dry, minute (subtle), liquid, stable and heavy qualities.
Langhana (reducing or lightening) therapy] Methods of langhana (reducing/lightening) therapy: The four purification therapies viz. vamana (emesis), virechana (purgation), Niruha basti (non-unctuous enema) and Nasya (nasal drug administration). Six other procedures viz. pipasa (control of thirst), maruta (exposure to wind/breathing exercises), aatapa (exposure to sunlight), pachana (applications of digestive measures), upawasa (fasting) and vyayama (exercise) are the ten methods of langhana (reducing) therapy.
[Indications of langhana] Those who are suffering from excessive vitiation of kapha, pitta,blood and waste products, are afflicted with obstructed vata and who have bulky and strong bodies should be treated using shodhana (purificatory) procedures of Langhana.
Those who are suffering from diseases caused by moderate increase of kapha and pitta such as vomiting, diarrhea, heart disease, acute intestinal irritation (cholera), intestinal sluggishness (alasaka),