KnitronomiconI have also discovered, on reading the Patient Info Leaflet, that my Loratadine (anti-histamine) may induce drowsiness (not unexpected), and also *sleeplessness*, rather more unexpected. I'd noticed on the nights when I sub in Cetirizine when I've finished a 15-count card of Loratadine, I've slept better; last night I just didn't take anything, and slept beautifully, with only one short waking period - AND I didn't need to get up to go to the loo! OK, I'll stick to one Loratadine a day in the mornings, then! The GP had suggested I could/should take 2 a day (or even 3 if needed), as there's an allergic component to my asthma.