Please don't flame me but I view his actions as suspicious in light of the fact that he did not take enough meds and the fact that he is an actor and promoting stem cell research.
I can't say one way or the other, but what I CAN assert, unequivocally, is that the ad WAS TAPED and NOT live. Thus, if Fox was having an attack or a reaction from not enough/too much medication, he/they could have easily postponed taping until such time as he had resumed control.
CASE CLOSED!!!!!
I would have to say this was planned.