药物开发的几个阶段 Disovery 2-10 Preclinical Testing (Lab and animal test. Phase I (20-30 healthy volunteers uaed to cheek for safety and dosage) Phase nl (100-300 patient volunteers used to check for efficacy and side effects) Phase lll (1,000-5, 000 patient volunteers uned to monitor reactions to long-term drug use) FDA Review Approval Postmarketing estIll 10 Year药物开发的几个阶段