He's stopped taking his medications. It's obvious, but he thought he'd tell me anyways.
They were bringing him down, he couldn't move, couldn't work, now he feels better, full of life...
He's right. On his meds he was a Zombie, nothing to say, impossible to talk to, reminding you very much of Jack Nicholson in "One Flew over the Cuckoos Nest" after they'd "fixed" him, the medications he was taking were some sort of Chemical Lobotomy and you wondered if the cure wasn't worse than the disease. But he's feeling better now, and it's only a matter of time.