Polyherbal compositions and methods for treating viral infections

A polyherbal composition for adjuvant therapy to an existing human immunodeficiency virus (HIV) therapy comprising:

• i. an effective amount of plant extracts of Withania somnifera and Mangifera indica;
• and
• ii. an extract of purified Shilajit obtained from rock exudates,
• wherein said plant extract of Mangifera indica comprises mangiferin and glycosides of mangiferin and of other xanthones and, optionally, polyphenolics.

A polyherbal composition for adjuvant therapy to an existing human immunodeficiency virus (HIV) therapy comprising:

• i. an effective amount of plant extracts of Withania somnifera and Mangifera indica;
• and
• ii. an extract of purified Shilajit obtained from rock exudates,
• wherein the extracts of Withania somnifera and Mangifera indica and an extract of purified Shilajit are standardized, wherein the standardized extract of Mangifera indica comprises mangiferin and glycosides of mangiferin and of other xanthones and polyphenolics.