You lose the ability to refuse treatments in any scenario the emergency responders / doctors deem you unfit to make a decision in the best interest of your/someone else health. It’s why “baker acting” in Florida is so controversial. Taking someone against their will and locking them in a facility for a minimum time without any real need of evidence.

Someone calling and telling them you said you were going to kill yourself is often all the evidence they need to start the process, whether they really said that is up to the emergency responders. For my friends that was 9 cop cars in the middle of the night. They dragged him out of bed at 4am because his partner at the time said he hadn’t been responding to her texts and she told them he was depressed so he might kill himself.

Once he got out he told me about it all and I’m fairly certain he won’t ever sleep with his phone on silent/vibrate again. (He broke up with them immediately after, but that has nothing to do with consent)