Even if he was having some kind of meltdown, he asked to leave for a 10 minute break to compose himself. He was denied, and instead they went straight to the sedatives & restraints. If he had the presence of mind to ask for a cool down period, it seems obvious he wasn't so deranged as to require heavy handed measures.

I agree we haven't heard the whole story, but this smells like the hospital is looking to discredit anything he reports by saying "he's nuts".