Rare: • inflammation of blood vessels (vasculitis including Henoch-Schonlein purpura), • numbness or tingling sensation (paraesthesia), • fainting (syncope), • very rapid and irregular heartbeat (artrial fibrillation) brain attack (stroke), • inflammation of the liver (hepatitis), • elevated blood alanine aminotransferase (ALT) levels, usually resolved upon discontinuation of treatment.