Avoid concomitant use w/ quinine. Increased effect w/ abobotulinum toxin A, aminoglycosides, Ca channel blockers, capreomycin, colistimethate, inhalational anesth, ketorolac, lincosamide, lithium, loop diuretics, Mg salts, polymyxin B, procainamide; quinidine, quinine, spironolactone, tetracycline derivatives, vancomycin.