1 From the Department of Pharmacy, University of California Davis Medical Center, Sacramento, and Clinical Pharmacokinetics/Dynamics Section, Medical Division, Burroughs Wellcome Co, Research Triangle Park, North Carolina
A program that calculates a value of clearance for an individual patient prior to reaching steady state in the early stages of aminophylline therapy is presented. The program is written for the Texas Instruments TI-59 programmable calculator and may be used with or without the PC-100C printer. The program can provide clinically useful information concerning projected plasma concentrations prior to reaching steady state with an accurate history of the dose administration and serum concentration determination. If the patient has not received xanthene therapy prior to admission, only one serum sample is required. If there has been prior drug exposure, a second serum sample is required. An iterative technique, which would be impractical to use without calculator assistance, is employed to make these determinations.
Key Words: programmable calculator clinical pharmacokinetics theophylline aminophylline therapeutic drug monitoring
Submitted on March 14, 1983
Accepted on June 2, 1983