http://www.medications.com/effect/view/35060 September 28.2008 6.45pm having sweats and dizziness headaches and sleepy and tired.had fish hook removed from finger and was given cephalexin for an antibiotic. chuck branch Mon, 29 Sep 2008 00:49:53 -0400 http://www.medications.com/effect/view/35060?item=12864 Seizures, weakness or tiredness are the side effects of Cephalexin. You can find more information at http://www.internationaldrugmart.com/keftab.html http://www.medications.com/effect/view/35060?item=12864