Lin Fuxian*
Toxicity testing of new compounds is fundamental for drug development process. The preclinical testing on different natural biological systems reveals the species, organ and portion explicit poisonous impacts of an investigational product. The harmfulness of substances can be seen by (a) examining the inadvertent openings to a substance (b) in vitro considers utilizing cells/cell lines (c) in vivo openness on trial creatures. This audit mostly centers around the different exploratory creature models and techniques utilized for harmfulness testing of substances. The pre-clinical poisonousness testing assists with computing "No Observed Adverse Effect Level" which is expected to start the clinical assessment of investigational items.