I got pretty sick during my initial hours of primary. It was New England in the winter, gusty, windy, bumpy, all the maneuvers, stalls, steep turns made it worse. I'm sure my early tendencies to overcontrol and grip tightly made things worse. I had a few lessons where it was around 0.5 in the practice area before I was green and puking into the sick sack, the overhead blasting full winter air on me and I'm dripping sweat. My CFI would take the airplane, obviously, and take us back to Nashua. Sometimes I would be feeling well enough to do the landing, sometimes he did it.
I stopped drinking coffee on an empty stomach before flights. I started wearing the "relief band" thingy that shocks you. I religiously ate a subway sandwich and drank an entire Reeds Extra Ginger Beer before every flight. I sucked on gin-gins ginger candies while flying. And I kept myself well ventilated, communicated better with my CFI about when I needed a break in the pattern on a bumpy day (just a short taxi back with the window open when I get stressed). I also realized that I was getting dehydrated during the flight (probably with all that cold air blowing on me!) and started carrying a water bottle to sip from in flight.
All of these seem to have made a difference because I enjoy some good turbulence now and again, steep turns, stalls, etc. I generally do not have a problem. Ginger really works, by the way. IMHO better than the relief band (I have felt quite sick wearing it). The worst is if I am with an instructor and they are flying some maneuvers to demonstrate. Interestingly I never felt nauseous even slightly during simulated instrument flight.
