Varanadi kashayam is a herbal decoction formulation. Also available in tablet form.
Its usage:

1. It is useful in obesity Ayurvedic treatment, cures indigestion, cures headaches, stomach gas bloating, headache, abscess and wounds.
   
2. It is also used as natural herbal diuretic and natural edema cures.
3. In treating obesity in ayurveda.

Dosage:
15-20ml on empty stomach with equal quantity of warm water, twice or thrice a day
if tablet 2-3tab twice or thrice a day or as directed by doctor.
Varanadi kashayam ingredients:
Varana (Crataeva religiosa),
Sairyaka (Strobilanthes ciliatus),
Shatavari (Asparagus racemosus),
Dahana (Plumbago zeylanica),
Morata (Chenomorpha fragrans),
Bilwa (Aegle marmelos),
Vishanika (Aristolochia bracteolate),
Brihati (Solanum melongena),
Bhadra (Aerua lanata), Karanja (Pongamia glabra),
Pootikaranja (Holoptelia integrifolia),
Jaya (Premna corymbosa),
Pathya (Terminalia chebula),
Bahalapallava (Moringa olifera / drum stick),
Darbha (Desmostachya bipinnata) and 
Rujakara (Semicarpus anacardium).
Reference:Ashtanga Hrudayam.