This registry is a place to share positive or negative side effects of using Cephalexin Monohydrate. If you directly experienced a side effect while using Cephalexin Monohydrate, then we encourage you to enter it here. Please note that entries here are the experiences of individual users, and in no way means that you or anyone else will experience the same side effect, since the same medication affects people in different ways. Please always contact your physician.
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July 5th
2008
5:04 PM
I have been on Cephalexin for 7 days. I am getting headaches that don't go away after taking Tylenol (I took 4 Tylenol this morning within 2 hours because headache was so bad and Tylenol did not help) and I am beyond tired- I am a normally very high energy person and for the past 2 days I literally can not keep my eyes open. Today at 12 noon I had to give in and take a nap (which I never do!) and woke up 4 hours later. Upon waking I could go back to sleep and sleep 12 more hours. I am considering stopping this med. I am taking it for a minor surgery that I had last week but I am exhausted!
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