I think you should at least try to get AE because, without them, you will most likely vomit. Yes. You have a back up glass. But, the idea of antiemetics are to minimize the amount you vomit. You don't want to vomit repeater times on your first glass was the amount of SN getting into your intestines will be very little. If you vomit several times on your first glass, what makes you think that you won't do the same with the second glass? Thus, I feel AE are critical for a more successful outcome.