Cephalexin Monohydrate Side Effects: I was prescribed cephalexin for infection in my head and after th http://www.medications.com/effect/view/19192 I was prescribed cephalexin for infection in my head and after the third day of using it I broke down into hives and started itching throughout my whole body. I took this medication seven years ago. After a couple of days I Wed, 12 Sep 2007 15:09:30 -0400 http://www.medications.com/effect/view/19192?item=1757 I took this medication seven years ago. After a couple of days I broke out into hives. When the initial Hives went away I kept itching. Then, the itching began to spread all over my body. I have been turned away by many doctors who wished me luck and s http://www.medications.com/effect/view/19192?item=1757