Are there any dewormers I can get over the counter that can get rid of internal parasites in reptiles?

I'm getting a bit worried about my CWD since he's not really that active. While I'm at school he seems to be very active cause his cage is a mess, so I end up cleaning it and changing the water while I bathe him. He hasn't defecated yet, but he did eat a few crickets on Sunday when I put them in and I think he ate some superworms out of this little dish I have for him today. So, I'm not sure if he has worms or not, but I want to give him some medication without going to the vet since it gets a bit expensive.