Abstract
Purpura in hepatitis C patients has a wide range of possible etiologies, some of which include mixed cryoglobulinemia and idiopathic thrombocytopenic purpura. Levamisole is a common chemical used as a lacing agent for cocaine. It is believed to enhance the addictive properties of cocaine, but it has been associated with a vasculitis syndrome that most commonly presents with purpura and leukopenia. We report a case of a patient with hepatitis C and cocaine abuse who presented with vasculitis, thrombocytopenia, and bloody sputum. A punch biopsy was performed, which confirmed the diagnosis of levamisole-induced vasculitis. A comprehensive rheumatology workup could result in variable serology and does not provide a definitive diagnosis. We suggest performing a punch biopsy as part of the initial workup for these patients, as it can provide rapid diagnosis and is associated with a lower cost.