>>12862004Strong H1 antagonists, scopolamine, those weird acupressure wristbands, etc etc
Motion sickness is caused by an ancient reaction in the primitive parts of the brain which makes you nauseous if there is a mismatch between what your eyes see and what your inner ear feels in terms of balance and velocity. Certain poisons cause this mismatch, so your body is just trying to help you dying from poisoning.