I fixed your spelling.

I guess it could make some people sick, but I don't think that's a common reaction. By swallowing smoke, you're also swallowing air along with the smoke, so what it's more likely to do is cause you to burp the air back up or have gas later if the bolus of air/smoke travels on down and gets trapped in your gut, which doesn't happen easily. You'd only be ingesting minimal amounts of particulate matter or tars and other chemicals with one mouthful of smoke, and the stomach is a tough place. I'd say there are lots of other things to be more worried about than swallowing smoke. I'm going to move this to the medicinal cannabis/health section.