Has anyone experienced hot flushes while taking Allegra? I started taking Allegra 180 mgs in 2001 for seasonal allergies in the spring for hayfever and in the fall for ragweed. I usually take it for 2 to 3 months each season. It works very well for me in controlling my allergy symptoms. In 2001 I started having severe hot flushes that just came on all of a sudden in March. They lasted for a couple of months then just went away. Same thing happened that fall. The same thing has happened for the last few years. Dr. has done a ton of blood work and nothing showed up to explain the hot flushes. Well, I started on Allegra two days ago for my hayfever and yesterday the hot flushes started up. I'm beginning to wonder if this is a side effect of the Allegra. I've done a lot of reading and searching on side effects of Allegra but can't find anything on it causing hot flushes. Just wondered if anyone else had this happen.