I am not aware of any rule change on import of pharmaceuticals. It was, and is, illegal without an FDA permit. Nothwithstanding that, small quantities sent by regular mail are usually allowed through.
There has been a recent change regarding customs duties on low value parcels of all types. I haven't heard how thst is eorking in practice.
There was a board member some time back who actually managed to get FDA permission to import a nedication not available im Thsilznd. You can read sbout the process here
https://aseannow.com/topic/1178361-importing-personal-meds-via-dhl/