Phentermine/Phentrametrazine..............
 

Are they OK to take with PN????

This is difficult to say. I don't recall seeing them on lists in the past. But they will possibly raise blood pressure, and if that happens, circulation to the hands and feet may be somewhat impaired. If you tend to Raynaud's issues that may become worse.

Here is the Wiki information on phenteramine:
http://en.wikipedia.org/wiki/Phentermine

What about caffeine???

Personally, caffeine does not affect my PN, but that may not be the case for everyone. I drink no more than 2 cups of brewed coffee per day.

This topic has been discussed here before.

Can caffeine make PN worse?

Doc