Does cephalexin cause you urinate more often?

My daughter has strep Throat, she was prescribed cephalexin 500mg twice a day. She just told me she's had to pee many times. So, I guess it is a side effect.

I had the same question. The day after I began taking cephalexin (2 doses 1st day) I woke up feeling extremely dehydrated. Sometimes I need to urinate as often as 2-3 times per hour, waking up repeatedly at night as well. My mouth has been constantly dry and I've had to drink water constantly in an attempt to prevent the terrible headaches I associate with dehydration. The symptoms have not improved during treatment (7+ day course 500 mg taken every 6 hours). I am due to finish today and certainly hope it improves when I am no longer taking them. Normally the gastro side effects of antibiotics are the worst thing, but this cycle of increased urination and all it brings with it has been very troublesome. I know it is not a "known side effect" but I know my body. I am not taking any other meds, have made no other changes, and this effect was strong and coincided perfectly with beginning the meds. A quick search online shows that many others are apparently seeing the same effects.

I started taking cephalexin 500 mg since last 3 days and now i have to pee every 15-30 minutes. Does anyone know if this will get better after i have stopped taking cephalexin.

I started taking cephalexin 500 mg since last 3 days and now i have to pee every 15-30 minutes. Does anyone know if this will get better after i have stopped taking cephalexin. Also i have dry mouth and unable to sleep because of frequent trips to the bathroom.

I am worried how long will this last. If anyone has gone through this experience and felt better after stopping cephalexin pls. respond. Thanks.

I hope this doesn't offend anyone - but we've had the similar situation with Cephalexin for the past few years in our family, and were told up front that it was normal and expected. But here's our situation: Dosage 500mg every 8 hrs for a 140 lb female for a urinary tract infection. However, the patient was our Great Dane. As she got older, she would have a UTI every now and then. This was the drug and dosage of choice from our Vet. She'd be on it for 2 weeks, and it was very effective. Within a few hours on it, she would start drinking a LOT of water (because she's thirsty) then begin urinating more frequently, with more volume and of course, more urgency. (Imagine 2 adults and a 140 lb dog running to get a door open before the flood hits.) Since it's definitely flushing fluid through her system, I wonder if that might be a reason our Vet was so comfortable to prescribe it for a UTI.