RT Book, Section A1 Katzung, Bertram G. A1 Kruidering-Hall, Marieke A1 Tuan, Rupa Lalchandani A1 Vanderah, Todd W. A1 Trevor, Anthony J. SR Print(0) ID 1180557908 T1 Aminoglycosides & Spectinomycin T2 Katzung & Trevor's Pharmacology: Examination & Board Review, 13e YR 2021 FD 2021 PB McGraw-Hill Education PP New York, NY SN 9781260117127 LK accesspharmacy.mhmedical.com/content.aspx?aid=1180557908 RD 2024/04/19 AB In the antimicrobial treatment of infections, multiple daily dosage regimens traditionally have been designed to maintain serum concentrations above the minimal inhibitory concentration (MIC) for as long as possible. However, the in vivo effectiveness of some antibiotics, including aminoglycosides, results from concentration-dependent killing. As the plasma level increases above the MIC, aminoglycosides kill an increasing proportion of bacteria and at an increasingly rapid rate. Many other antibiotics, including penicillins and cephalosporins, cause time-dependent killing of microorganisms: their in vivo efficacy is directly related to time above MIC and is independent of concentration once the MIC has been reached.