make vomiting more impactful

[RSOD]

i don't want a stun, because, as mentioned, will drop your items, which is incredibly annoying for just some food poisoning / ipecac. a slowdown or dizziness / misstep is a lot better of a compromise than "lay on the floor and drop all your items every 5-10 seconds". and if people don't want to deal with slowdowns or dizziness, at least it'll make promethazine worth making and keeping around.