Your hep provider is in agreement with Medhelp’s ex resident HCV expert that grapefruit doesn't have interactions with Interferon & Ribavirin,
Douglas Dieterich, MD
Jun 13, 2008
It actually can increase some drug levels because of inhibiting a liver metabolic enyzme. However neither interferon or ribavirin is metabolized by that particular enzyme(p450) so it is OK to drink your grapefruit juice.
But there are many other drugs that do have interactions with grapefruit
I avoid grapefruit because it interacts with simvastatin and oxycodone. If you are taking other medications please check with the respective provider and the pharmacist about interaction with grapefruit.