Hi all, my son has been on an antihistamine for a couple for months now for chronic rhinitis and they were working a treat. However the last few weeks, it's all come back and it's triggering his asthma a bit. I'm suspecting it's hayfever starting up. He's on cetirizine but was wondering what other options there were for 3-4yr olds? Am going to take him back to the doc/asthma nurse to see if they can suggest an alternative but thought I'd see if anyone had tried anything different. Thanks!