You would be shocked at the low medical costs here in Thailand. I broke my wrist four years ago playing soccer and two sets of X-rays, the cast, the follow-up visits, cast removal, and pain medication (which I threw away because I don't take toxic drugs if I can help it) all cost $140.
I almost laughed when I paid the bill.
I always toss any prescribed medication given me by Thai doctors, but the cost is so small, it doesn't matter. It's easier than arguing with them.