Na mkpokọta, mmepe nke ngwaahịa ọhụrụ ga-agarịrị (1) nyocha ụlọ nyocha (nyocha ụzọ usoro mmepụta na nguzobe nke ụkpụrụ njikwa mma) (2) ọmụmụ izizi (pharmacological, toxicological, pharmacodynamic na nnwale anụmanụ ndị ọzọ) (3) nri ahụike. ga-agafe ule nchekwa nke ngwaahịa a nwalere (4) Ọgwụ ndị ahụ kwesịrị ịgafe usoro ise nke ọrụ nyocha, dị ka usoro nke mbụ nke ụlọ ọgwụ (nnwale nchekwa nke ọgwụ na ndị ọrụ afọ ofufo dị mma), usoro nke abụọ nke ụlọ ọgwụ (obere Clinical). Nchọpụta ọgwụ ọgwụ), na nnwale ụlọ ọgwụ nke Atọ (nnukwu nyocha Clinical Pharmacodynamics), tupu enwee ike ịkwado ha maka mmepụta nnwale. Mgbe otu afọ nke mmepụta nnwale, ọgwụ ahụ ga-akọrịrị nsonaazụ nke nkwụsi ike dị mma yana ịgbasawanye ule ụlọ ọgwụ tupu itinye akwụkwọ maka nnabata mmepụta ihe.