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What tests must a drug undergo before it is tested on humans?

Before a drug is tested on humans, it has a long-term development time behind it. At the very beginning, there is the active ingredient discovery. This involves a targeted search for an active ingredient that has a specific effect in human Body evokes. Once such an active ingredient has been identified, it must undergo many laboratory tests. If, after these trials, it is concluded that the drug is safe, it is finally tested on animals. Here checkswhether the distribution of active ingredients corresponds to the previous calculations. and whether the preparation has a toxic effect in the living organism. In addition must tested whether the new active ingredient achieves better results than drugs already approved on the market. preparations. Are these requirements fulfilleda Phase I study in humans can be applied for. For this all points are checked again by responsible authorities and ethics committees reviewed. Only then are drugs tested on humans in very small doses.