| i carry my insulin pens around in my pockets all the time and i havent' noticed any decrease in effectivness... if anything it would have thought it would shorten the life of the insulin, as in... it lasts 28 days at room temperature... perhaps keeping it in your pocket all day at a slightly warmer temp, it might not last 28 days... but then who's insulin cartridge lasts 28 days before running out? i know mine doesn't.
__________________ Stu 
Type 1 Since - 24/7/2006 HbA1c
13/10/2006 - 7.2%  | 15/12/2006 - 6.0%  | 29/06/2007 - 7.1%  | 02/11/2007 - 7.8%  | 29/02/2008 - 6.5% 
Insulin - Levemir and NovoRapid | Meter - Accu-Chek Compact Plus mkII Pasta is a gift that just keeps giving... |