A few weeks ago, we took our 6-month-old on the plane for the first time. Five hours into a ten-hour flight, with no warning at all, he vomited (and spectacularly, not a little milk burp). A week later on the way back, despite being careful not to overfeed him etc, he did it again. On both occasions, it happened after the plane hit a tiny bit of turbulence and we were instructed to lift him out of the bassinet where he'd been sleeping happily.
We're fairly sure this is specifically about planes, since he's never vomited before, between the flights, or since, nor do we have any reason to suspect ear infections, gastro, etc. He had his 6-mo checkup shortly after we returned and passed with flying colors. He's also completely OK with boats and cars, including twisty mountain roads, and he's eating solids happily.
Unfortunately we've got the same pair of flights coming up again 3 months' time, and this time one of them is a daytime flight, which is likely to be even worse.
So, without further ado, how do we stop him from throwing up next time he's on a plane? I'd definitely be open to (real) medication, but no homeopathic hoo-ha or anything lacking actual evidence of effectiveness.