I have written recently about Guy Tennenbaum, a stage 4 prostate cancer patient who is following an "unorthodox" treatment, and vlogging about it on YouTube (he's heavily shadow-banned on the platform) - see #989093
In this video, he complains about how he can't get fenben from pharmacies across the state of Florida where he resides, despite being in possession of a doctor prescription. Either it's out of stock, or pharmacists refuse to sell, because they are not allowed to.
Right now, you can only get it from Amazon but the problem is, you never know what you get from Amazon because of the lack of independent testing.