@Aisling "'Mentally unstable' usually is something like 'very, very moody', 'getting angry because of nothing' and such, or, in other words, it's what Vlad is..." Ioan said. "But still, he can make reasonable decisions. He can mostly make them, even when he's angry or depressed..."
"It's not always stupid to not listen to a doctor's order," the father said. "Especially not when you've collected enough information about whatever disease you have and then see that your doctor's order might not be all that good. Actually, they are recommendations. Not orders. We can't force you to obey, and we aren't perfect. Sometimes, we do make mistakes as well. That's why you should always get informed about the conditions you have. - If a patient doesn't want to listen to my orders, I'll teach him the negative consequences his behavior might have. If he still doesn't want to obey, I'll respect his decision."