Capsaicin cream and propranolol may provide benefit for chronic vomiting.

“I have seen a study where they actually applied capsacin cream and that also seemed to provide benefit something about activation of the the something with thermal regulation because the other thing that seems to have shown some benefit is propanolol which again would suggest some kind of sympathetic which is a beta Block it's a beta blocker so yeah it's your effect so there's something with autonomic it must be messing up some kind of autonomic balance or something with thermal regulation”