[He nods, and now he's somewhat apologetic.] I always intended to tell you after the testing. I had to be sure of the effects before it was given to anyone else. [He knows he has a reputation, even if he pretends he doesn't.]
We had scheduled a test but then Sentience and his rebellion happened and it hadn't gotten rescheduled. But based on today, the only effect I'm observing is that after the effects wear off, the subject is left fatigued. That's why Allen's so exhausted.