Case 1. Cholestatic hepatitis from amoxicillin-clavulanate. [Modified from a case in the database of the Drug-Induced Liver Injury Network] A 75 year old man with a history of prostate cancer and regular alcohol use The Amoxicillin molecular formula is C 16 H 19 N 3 O 5 S • 3H 2 O, and the molecular weight is 419.45.. Amoxicillin Capsules, USP: Each Amoxicillin capsule, with...