This drug is still available here in US... by Teva company.
You can verify this at FDA.gov Search Orange Book there and put its name into the keyword search to find any drug in the US.

We have had some posters try this on our PN forum, but all seem to get the terrible erosive esophagus side effects and had to discontinue.

You can search it on PN forum and find those posts.

An alternative would be a lidocaine infusion...so you could discuss this alternative which may work. Members on RSD forum have sometimes posted this treatment.

If your pain is in a small targeted area, Lidoderm patches may work for you as well. These are RX only as is the lidocaine infusion, which is done in a hospital setting.