I believe it has something to do with the nerves that control swallowing...some smarter folks will put you onto a thread somewhere.

I would'nt worry too much about it however while it's happening be careful you don't get something lodged in your airway.

You might want to do a search on swallowing and you'll probably get all you need cuz this is a common problem for all of us from one time or another.

I am wondering if it is sign of yeast, or a reaction to the drug?

Maybe not, maybe just a herx from lyme in the throat area. I have throat issues, they were really bad, almost lost the abiltiy to swallow, then went back on antibiotics and within a few days was much better.

Just in case it is a yeast overgrowth, watch for other symptoms of yeast.
it is a cesaphlorin, the rocephin, and I think it is easier to get yeast overgrowth for some.

I have noticed that if my yeast gets really out of hand, my throat can act up, wether or not this is actually yeast overgrowth in the throat, or the yeast bringing down my immune system making the lyme worse.

I meant to tell you, that a few years ago, I had mucsle problems in this area and food would get stuck in esphogus and they found spasms on test. I also had nerve pain in throat area the other day and my throat is still not down to what it was.