The Pathway Ontology (PW), is currently being developed at the Rat Genome Database. For more information about this vocabulary, please see Petri et al. The rat genome database pathway portal. Database (Oxford). 2011 Apr 8;2011:bar010. Print 2011 or contact us (http://rgd.mcw.edu/contact/index.shtml).
The pharmacokinetics and pharmacodynamics pathway of caffeine, a psychostimulant of the methylxanthine class. It can confer some protective effects against some conditions. It is largely considered safe but the pure powdered caffeine, available as dietary supplement, can be lethal in higher amounts. Genetic variations can result in changes in drug availability and can cause differences in the response of the organism to the drug.