Clinical Trials in Alzheimer’s Disease: A Hurdle in the Path of Remedy
Table 1
Clinical trial phases as regulated by the FDA. Table detailing FDA-regulated clinical trial phases as a function of their length, purpose, and test population. IND is not a distinct phase of the clinical trial process but is a required application between the preclinical phase and phases I-IV.
Length of phase (years)
Purpose
Test population
Preclinical
6.5
Toxicity studies
Nonhuman animals
IND
N/A
Successful completion of phase I Allows for clinical trial to be commenced
N/A
Phase 0
7 days
To show whether a drug’s pharmacokinetics and pharmacodynamics warrant continued exploration