Cephalexin Monohydrate and headache

Last night I took cephalexin and Tylenol . I had a headache and woke up with blurred vision that lasted about 5 minutes.

dry mouth, burning of the eyes, headache, dizzy,weak, loss of appetite,back spasm,diarrhea. I have been taking cephalexin monohydrate 500my for 3 days, cramping, stomach pain

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!

I have been taking two 500-mg pills a day for a sinus infection. I have felt extremely tired, dizzy, stomach problems, cold chills and headache. Also, very thirsty and hungry. I am beginning to think that the "cure" (cephalexin) is worse than the disease!

cannot sleep well after taking 500mg/ 4times a day. Feel drowsy, tired. Headache and pain also present.