________ An open office hours system is the least structured of all the systems

The phase of drug testing that determines the pharmacokinetics, toxicity, and safe dose in humans is:

a. Phase one b. Phase two c. Phase three d. Phase four

An "orphan drug" is best defined as a drug that is:

A) in its own chemical classification. B) used specifically to treat a rare disease. C) intended only for the pediatric population. D) not producible as a generic alternative.