reactions may present as typical allergic symptoms (eg, itching, urticaria, rash, edema) after a single dose, or may manifest as severe idiosyncratic dermatologic reaction, pulmonary (eg, pneumonitis),
renal (eg, nephritis), hepatic (eg, hepatic
failure or necrosis),
and/or hematologic (eg, anemia, cytopenias) events, usually after multiple doses.
If drug allergy is suspected you need to discontinue the drug and report to your doctor immediately.