out of the hundreds of times ive done coca with diffrent ROA's i think ive only puked off of it a few times, but IV cocaine period will make u puke, even small doses IV'ed will make u feel like you need to puke but most of the time laying flat on your back and deep breathing can hault that.. but big doses, bellringers (IV) definitly can and will make you puke most of the time lol, thats the main problem with IV coke i think, well that and making your injection spots look horrible, thats for sure.