re antihistamine for sleep aid but after you have taken antihistamines for a few nights doesn t it start to have a paradoxical effect i used to take one every night for allergies and couldn t figure out why i developed bad insomnia finally figured out it was the antihistamines i would fall asleep for a few minutes but would awaken at the drop of a pin a little later and could not get back to sleep i don t have that problem since i stopped the antihistamines at bedtime alice
