Yeah, a total bro moment there.... but personally I wouldn't use such a miracle healing potion on someone that isn't my closest family or myself.
Instead I would have tried to search for healing items in the shop. Or even try searching for gates with confirmed healer enemies and try to extract their shadows.
@blazebolt7
Doesn't she have some sort of PTSD after the school gate events?
Wouldn't work. That's the same illness his mother had, and he had to get that precious medicine in order to cure her. It's the only thing that will cure the eternal sleep.