As part of a project to review and streamline its Codes of Practice, ASA released the Therapeutic and Health Advertising Code with accompanying Guidance Notes. The object of this Code is to ensure that advertisers maintain rigorous standards in therapeutic and health advertising.

The Code covers all words and visual depictions in all advertising for therapeutic products (medicines and medical devices), natural health products and dietary supplements, health services and methods of treatment. This Code may also apply when therapeutic or health claims are made in advertisements for other products or services not explicitly listed in the code.

Read more about it here