@Gavin – good to see your back up and fully functional. Success stories are exactly what we like to hear so well done to you. Just make sure you keep a benchmark blood test for liver and kidney before starting allopurinol and a blood test shortly after starting allopurinol to compare livery and kidney functions and to confirm everything is ok.
Secondly, may I ask what sort of exercise your doing, is it just the cross trainer you have at home?
Finally, which brand of prick test monitor are you using?
Thanks