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GSK Canada Head Office

GlaxoSmithKline Inc.

100 Milverton Drive

Suite 800

Mississauga, Ontario

L5R 4H1



Bureau d’affaires du Quebec

75 Rue Queen, Suite 1400

Montreal, Quebec

H3C 2N6


General Inquiries

  • GSK Pharmaceutical inquiries: 1-800-387-7374.

Product Inquiries

  • Prescription, Stiefel (a GSK Company) dermatological products and vaccine inquiries: 1-800-387-7374.

Report a Possible Side Effect

At GSK we take the safety of our patients and consumers very seriously. We know that side effects can happen but it is not always possible to predict who will get them. For this reason, it is vital for us to continuously monitor the safety profile of our products.

How to Report a Possible Side Effect

To help us process your information quickly and effectively, please remember to report as much relevant information as possible. At a minimum you will need to provide the following:

  1.  The initials of the person who experienced the possible side effect and/or other identifiers, such as gender, date of birth.
  2. The contact information of the reporter, namely the person who is reporting the issue.
  3. A description of the possible side effect itself, such as the signs and symptoms experienced, date the possible side effect started and the result of the possible side effect.
  4. The name of the GSK/ViiV product involved.

Our Privacy Notice outlines how GSK handles the processing of personal information when dealing with your enquiry, complaint or adverse event report.

Report an Adverse Event

Either call us at 1-800-387-7374 or send an email to