Section 6.8.1 (h) of the Indian Medical Council (Professional Conduct, Etiquette and Ethics) (Amendment) Regulations, 2009 - Part-I outlines the guidelines on endorsement. 

It says, “A medical practitioner shall not endorse any drug or product of the industry publically. Any study conducted on the efficacy or otherwise of such products shall be presented to and / or through appropriate scientific bodies or published in appropriate scientific journals in a proper way.”