Very helpful link - thank you. There are a few puzzling (and unhelpful) articles online.
But it looks like antidepressants and similar. One article mentions
over-the-counter drugs eg strong pain relief may well be banned too.
Hopefully by the time you visit, Bob, the mist will have lifted and we'll have better
info. The visa application isn't too much more complicated than in years gone by. Except
that you need to list every country visited (as per your passport) with dates.
Some of my stamps were almost illegible so I had to use old calendars to remind me (thank
goodness I kept them). The fingerprinting takes about 30 seconds.
All part of the fun!