Hi... I'm one of those people who spends hours reading every post imaginable on the internet about things like antibiotics - which I hate - before I decide to take them. I'm definitely a wuss when it comes to side effects, and as a result delayed takin my cefalexin prescription for 4 days having read many scare stories here. If you're now doing the same as I did, then take a breather for a minute and realise that we're all different and react in different ways, and that most people who sail through treatments with no ill effects whatsoever, wouldn't even think of ging on teh net to say so.
Having said all of that, I can't say it the most pleasant of feelings. Im half way through a 7 day course for chest infection. Have been afected by nausea, but mainly towards the end of the day as the levels in the blood are quite high (after 4 doses). Stomach upsets, things just feel tender and wrong, but no diarrhea as yet anyway. Tired yes, and the headcahes too that people talk about. But for the first time today I can just about breathe through my nose!... so something is happening. I'm the worst person to say don't get freaked out by online reviews etc, but at the end of teh day, we all want to get better, and the reality is we might have a slightly bumpy ride. But having read every bit of published evidence I could find, I know that most people do in fact use cefalexin safely and without disturbane. Pleased for them!!! Might come back at the end of my 7 days and update, as I might be completely wrong! Good luck to everyone reading these posts anyway...