Bit of an update, I was at trackschool yesterday at Wakefield.
Did everything as per normal, except had some banana bread instead of a ham cheese sammich at the bakery!
I took three travelcalm tablets when I arrived at the track. Within about 15 mins I was having a massive headspin! Too much caffeine I think. Coffee at home, coffee at the bakery, and then the caffeine in the tablets. By the time I headed out on the track I was feeling mostly fine. Track was wet so I just did some installation laps.
Came back in, swapped the wheels for the slicks, and never looked back all day. Never felt sick at all. Did 7 sessions I think, setting a PB.
So that's a win. Adjust coffee intake in the morning to suit, and I think it will work well.