Yet another company in the pharmaceutical industry is investigating allegations of bribery and corruption, and this time it is French drug company Sanofi.

Sanofi said it is conducting an internal investigation amid allegations made by a whistleblower that employees bribed doctors in the Middle East and East Africa between 2007 and 2012, encouraging them to boost sales of Sanofi drugs in those markets, according to e-mails reviewed by The Wall Street Journal.

Jaclyn Jaeger is a freelance contributor to Compliance Week after working for the company for 15 years. She writes on a wide variety of topics, including ethics and compliance, risk management, legal,...