Hi Chalkie3051 ... I have every sympathy for you regarding "sweating" (or "hot flushes").
I have just finished a course of 4x4 weekly implants of Zoladex to reduce the size of my prostate prior to Brachytherapy (see my profile) and this has been the most frustrating side effect.
My wife, bless her, bought me a little hand-held fan and this has been brilliant.
I have also found that a hair dryer (on the cold setting!!) is also very effective, particularly after a warm shower!
Obviously, when out and about, unless you carry a little fan with you, all you can do is strip down to shirt and trousers until you cool down!
For example, I have had to do this every Sunday at church throughout the winter. It really looked odd when everybody else was wrapped up in their large winter coats!!
Good luck and I hope this has helped.
Regard Tom