Nephrotoxic (renal) effects; dizziness, tinnitus, vertigo, roaring in the ears & hearing loss; numbness, skin tingling, muscle twitching, convulsions & myasthenia gravis-like syndrome; resp depression; lethargy; confusion, depression; visual disturbances; decreased appetite; wt loss; hypotension & HTN; rash, itching, urticaria, generalized burning; laryngeal edema; anaphylactoid reactions, fever; headache; nausea, vomiting; increased salivation; stomatitis; purpura; pseudotumor cerebri; acute organic brain syndrome; pulmonary fibrosis; alopecia; joint pain; transient hepatomegaly & splenomegaly.