What medicine affected gray fox on metal gear solid?

Question

What medicine affected gray fox on metal gear solid?

Answer 1

They were probably just drugs meant to keep him mentally stable, but were wearing off when Fox started to get all crazy.As a matter of fact, according to MGS4, those drugs may have been secreted by an experimental nanomachine network meant to keep a solders emotions under control.Since Fox bailed out of the lab where he was reconstructed and killed the Doctor that revived him,his nanomachines were no longer being monitored and thus maintained.However, I emphasize that this is mostly speculation,either way,it's never stated what exactly what the medicine was in MGS1 or anywhere else.