Yup, motion sickness, allergies. I have the same reaction to loratidine (Claritin, rinityn) same kind of stuff....go figure! I start yawning, then sneezing, then feel sick. Maybe I'm allergic to allergy meds
There's quite a lot of meds for itching - although we haven't discussed it here (I don't think), some RSDers have less pain but bad itching,

Hope you get calmed down, poor love,
all the best