NAT2 and hepatitis B virus infection: This review also deals with how multifactorial interactions including genetic polymorphisms in CYP2E1, N-acetyl transferase 2 (NAT2), and glutathione-S-transferase (GST), as well as factors such as drug–drug interactions, nutritional status, coexisting infections (e.g., hepatitis B/C), and alcohol consumption collectively modulate individual susceptibility to AT drug–induced hepatotoxicity.