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: 

“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.”