Conversation: The conversation between human and AI assistant.
[|Human|] I started taking allegra about a month ago and I thnk about a month ago I started to have pain in my left leg. It is not a cramp or rls but a pulsating slightly burning uncomfortable pain that wakes me from sleep. As soon as I get un the pain goes away. I was wondering if there is any correlation between the two? Thank you
[|AI|]  Thanks for your question on Chat Doctor. I can understand your concern. No, Allegra can not cause such pulsating leg pain. Allegra is having fexofenadine. It is antihistamine. It has nothing to do with such leg pain. So there is no correlation between your Allegra ingestion and this chest pain. In my opinion, you should get done left lower limb arterial and venous color Doppler to rule out DVT (deep venous thrombosis) and varicose veins as both of these can cause similar kind of unilateral pulsating pain. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.