NAI - No Action Indicated
No objectionable conditions or practices were found, or those found do not justify further regulatory action.
VAI - Voluntary Action Indicated
Objectionable conditions were found, but FDA does not expect to take regulatory action, and the firm is expected to correct voluntarily.
OAI - Official Action Indicated
Significant objectionable conditions were found and regulatory or administrative action may be recommended, such as a Warning Letter.