During drug testing and approval,the drug is usually tested in a relatively small sample (200 to 300 people)with a specific disease or pathologic condition during

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Phase 2 clinical trials involve testing the drug in a larger sample size (hundreds to a few thousand) of individuals with the specific disease or condition that the drug is intended to treat. This phase is designed to evaluate the efficacy and safety of the drug and to identify any potential side effects. Preclinical trials are conducted in preclinical models (such as animals or cell cultures) to evaluate the safety and efficacy of the drug before testing in humans. Phase 1 clinical trials involve small groups of healthy volunteers and are designed to evaluate the safety and pharmacokinetics of the drug. Post-marketing surveillance occurs after the drug has been approved and is being used by the general population to monitor any adverse effects or long-term safety concerns.

During Drug Testing and Approval,the Drug Is Usually Tested in a Relatively