If you snort it, at least you won't lose it if you puke, and the bioavailability is supposed to be higher that way the more refined it gets, so yeah but try half maybe to see if that's enough and you might save some $$$ too.
For nausea get your hands on cyclizine, fairly available online even though it's supposed to be prescrpition only. I've got ones off the doctor and ones online, no difference, it's cheap so no point in faking it.
Thing about cyclizine is it's an anti sickness tablet made from the good old poppy, so it fits the bill like no other.
And I've had weird random vomiting & wd like feelings, after taking kratom. It was like withdrawal except taking more kratom didn't work, so I figured my upset tummy was refusing to digest it, food was coming back untouched so makes sense to me. I'd weaned myself onto kratom & bupe only weeks before that.
Antihistimines can help me too, less sick, more sleepy.