Drug	Peak concentration (μg per mL)*	Trough concentration (μg per mL)†	Serum creatinine
Amikacin (Amikin)	15 to 30	5 to 10	Every 3 days
Gentamicin	4 to 10	<2	Every 3 days
Netilmicin (Netromycin)	4 to 10	<2	Every 3 days
Tobramycin (Nebcin)	4 to 10	<2	Every 3 days
Streptomycin	15 to 30	5 to 10	Every 3 days