Which agency reviews drug advertisements directed to healthcare professionals?

The Pharmaceutical Advertising Advisory Board is the agency that reviews drug advertisements directed to healthcare professionals. This board plays a crucial role in ensuring that advertising practices comply with specific ethical standards and regulations. Their primary focus is to assess the accuracy, balance, and presentation of the information provided in advertisements. This oversight helps to protect healthcare professionals from misleading claims and ensures that the advertisements convey the necessary scientific information in a clear and responsible manner.

Health Canada, while a key player in regulating drugs and health products, primarily focuses on the safety, efficacy, and quality of pharmaceuticals rather than directly reviewing advertisements aimed at healthcare professionals. The Canadian Institute for Health Information is focused on health data and statistics; it's not involved in the regulation of pharmaceutical advertisements. The Association of Canadian Advertisers deals with advertising standards generally, but it does not specifically review drug advertisements in the healthcare context. Hence, the Pharmaceutical Advertising Advisory Board stands out as the correct choice for this question.