a clinical pharmacokinetic (or therapeutic drug monitoring, TDM) tool for mobile devices including PalmOS-based PDA, Java-supported cellular Phones (SymbianOS)and NOW Window Mobile 2003 Devices. JavaPK® is written in J2ME (JDK v5.0). JavaPK® is the first clinical pharmacokinetic program in the world, which is designed and implemented for cellular phones using both Sawchuk-Zaske method (aminoglycosides) and Bayesian estimation method (aminoglycosides - gentamicin & amikacin, vancomycin, digoxin, phenytoin, and cyclosporin-A). With Bayesian estimation, one can use any single-blood sample (at steady-state) to estimate individual pharmacokinetic parameters. Please check our website http://javapk.pkpd.org.tw for more details.