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4 Cards in this Set

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  • Back
Phase I
Initial introduction of drug for human use (Physician must order).
A patient participating in an investigational drug study must sign an informed consent. Participation is voluntary and the patient may withdraw at any time. Clinical studies are performed on 5 to 20 volunteer patients.
Phase II
Establishes effectiveness and relative safety

Limited trials

Patients are closely monitored
Phase III
Specifies effective / indications

More precise definitions of adverse effects
Phase IV
Post-marketing trials

Long term

No control groups involved

All remaining investigational drugs should be returned to the person(s) responsible for the drug.