This registry is a place to share positive or negative side effects of using Keflex. If you directly experienced a side effect while using Keflex, 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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August 15th
2009
8:37 AM
keflex is terrible. took 500g 3x a day but only lasted two days instead of a week (and using the repeat i was prescribed) for my throat infection. it basically knocked me out for the two days i was on it, also experienced extreme nausea and some lower back pain...have now switched to amoxil after talking to my doctor and am feeling much better....won't be taking keflex again. i wonder if there are people who have taken it without any side effects.....
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