drug monitoring drug mechanism 12 Male 10 nonhuman 10 priority journal 10 Animal 6 Rats 6 animal cell 6 preliminary communication 6 radioisotope 6 rat 6 Androgens 4 Rats, Inbred Strains 4 Support, Non-U.S. Gov't 4 androstanediol 4 animal experiment 4 dose response 4 drug administration 4 drug analysis 4 drug metabolism 4 drug response 4 indometacin 4 male genital system 4 testosterone 4 unclassified drug 4 (Rat kidney medulla) 2 4 aminobutyric acid 2 4 aminobutyric acid b receptor 2 4 aminobutyric acid receptor 2 4' chlorodiazepam 2