over the counter medication?

[WingedWolfPsion]

Step one: Find a good reptile vet.
If you do this, you will not be overcharged, and you will get quality care for the reptile. If you settle for less than a good reptile vet, your reptile may not get good care. ARAV.org can help.

Step two: Educate yourself, so that you know in the first visit whether or not the vet you chose is a good reptile vet. (Sadly, this is still necessary).

If you're getting a wild caught animal, it may have a whole host of exotic parasites, bacteria, and even viruses, dwelling within it. That really requires a professional to identify everything and treat it appropriately. Expect wild caught animals to cost MORE, not LESS, than captive bred animals, for this reason. If you don't like that, just buy a captive bred ahaetulla. I've seen them around, though not commonly.

All that having been said, it has been a source of low grade annoyance for me for years now that metronidazole and fenbendazole can all be purchased freely at feed stores in concentrations appropriate for the treatment of livestock, but CANNOT be purchased in concentrations appropriate for the treatment of small animals (such as reptiles).
I own a microscrope, and having once worked for a vet, I know how to prepare fecal float, and learning to identify pinworm eggs is not rocket science, nor does it require a veterinary license. There's a nice book available, with photos. Vets use it. We should be able to regularly screen our own collections, and treat them simply for anything we identify, saving vet visits for more serious issues than a minor case of worms brought in by a rodent meal.