It would be completely bonkers for an antiemetic to commonly induce an emetic urge in any but rare exceptional cases.
Most seasickness drugs are just first-generation antihistamines sometimes combined with a caffeine analogue to counteract the sleepiness.
Dramamine/Gravol (dimenhydrinate) is just benadryl (diphenhydramine) plus the caffeine analogue theophylline.
Bonine/DramamineII (meclizine) is also a first-generation antihistamine.
Promethazine is also a first-generation antihistamine.
Non-antihistamine antiemetics like ondansetron or scopolamine transdermal patches require a prescription from a doctor and therefore aren't commonly used for motion sickness except for occupational seafarers. And it would still be absolutely stupid if the drugs given to prevent nausea commonly caused nausea.
It would be completely bonkers for an antiemetic to commonly induce an emetic urge in any but rare exceptional cases.
Most seasickness drugs are just first-generation antihistamines sometimes combined with a caffeine analogue to counteract the sleepiness.
Dramamine/Gravol (dimenhydrinate) is just benadryl (diphenhydramine) plus the caffeine analogue theophylline.
Bonine/DramamineII (meclizine) is also a first-generation antihistamine.
Promethazine is also a first-generation antihistamine.
Non-antihistamine antiemetics like ondansetron or scopolamine transdermal patches require a prescription from a doctor and therefore aren't commonly used for motion sickness except for occupational seafarers. And it would still be absolutely stupid if the drugs given to prevent nausea commonly caused nausea.