Looks like there is an enormous profit motive for selling "trans" drugs to children. Tweet author was able to reference a 2015 paper for some indication of the prices for the medicines. However, he didn't provide "sauce" for the prices he mentioned in this post. Anon would not doubt the prices are now that high, but needs some sauce.
https://twitter.com/JoshWalkos/status/1634573369256419330