Your body won’t let you throw up more than you can in one go. If you haven’t noticed, when you throw up, your whole body tenses, you’re wrenching hard, and you can’t breathe. If you’ve been drinking for hours, you have a lot of poison in you. If it takes multiple purges, your body couldn’t get it out in one go. You’re expelling air as well as everything in your stomach. So you’re starving for air, expending a lot of energy, and your airway is full of vomit. Your body knows you need to breathe, so it won’t just expel everything no matter how long it would take. Not to mention your muscles are only so strong, and those muscles don’t get worked out super regularly.

So basically your body just can’t. If you’re puking more than once, you needed to. Because there have been plenty of times where I’ve eaten something off and I threw up once and felt better/didn’t need to throw up again.

But also, I agree with everyone else. It sounds like you have a problem.