Short description
In drug development, preclinical tests are carried out to investigate the behavior of novel agents in cell culture or animal models.

Detailed description

The aim of preclinical tests is to identify substances showing a therapeutic effect. Cell cultures and animal models are used to investigate whether these substances are toxic, damage the genetic material or induce malformations. This phase lasts ten years on average. Only few of the substances examined are suitable for further testing in humans and the subsequent clinical phase.