Genentech Customer Service For product questions, issues, and returns.
Phone: (800) 551-2231
Hours: Monday - Friday, 9am - 8pm EST
You may report side effects to the FDA at (800) FDA-1088 or www.fda.gov/medwatch.
You may also report side effects to Genentech at (888) 835-2555.
Phone: (800) 334-0290
Hours: Monday - Friday, 5am - 5pm PT