Rasayana Tantra is one of the eight important clinical branches of Ayurveda. It deals with rejuvenation and longevity. Rasayana helps to achieve three types of action - protect youthfulness and avoid senility, encourage life span, intellect and potency, and check and cure disease. Rasayana has been classified in various ways including based on mode of administration as outdoor or indoor regimen, based on utility as preventive or curative etc. Many herbal formulations and procedures are mentioned in classical texts for rasayana therapy.