Thanks ladies. We are now trialling a Seratide puffer with spacer, started yesterday. The Singulair did absolutely nothing for his cough and it's going on for over 2 months that he's been coughing now. I didn't realise it gets worse during the cold months - the Dr hasn't told me that, seem pretty obvious, I feel a bit silly that I didn't put the 2 together now! That's just another reason I'd love to move back home to Newcastle or even lovely warm QLD....