Keflex and Upset Stomach: What Users Say
Reviews for Keflex
- Jea...
- Taken for less than 1 month
- May 28, 2019
For Bladder Infection "Took a 500 mg dose of Keflex twice a day for one week - I had a UTI. Side effects were diarrhea, headaches, felt depressed, upset stomach, and nausea. Now I’m having stomach cramping. Just hope the urinary tract infection I had is gone after taking this strong antibiotic."
- Anonymous
- July 22, 2011
For Skin or Soft Tissue Infection "Works very well for treating the cellulitis I got from an insect bite. But don't drink alcohol while you are on this medication. I had half a beer and started feeling really nauseous, had a migraine and my stomach hurt."
Frequently asked questions
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- Ama...
- Taken for less than 1 month
- September 14, 2018
For Bladder Infection "I have constant battles with UTIs, so I’ve taken a lot of different antibiotics. Keflex is definitely a good one, but for me, I have to take 500 mg three times a day, so I get some side effects, mostly tired, stomach cramps, and dizzy. It’s not bad, though, like some of the other ones I’ve taken. Before I had repeat infections, I had the 500 mg twice a day dose and had very minor cramping from that dose. It’s my go-to when I can take it. Drink lots of water with it too, it helps flush your system faster and get rid of the infection and its side effects quicker."
- Ros...
- Taken for less than 1 month
- August 7, 2020
For Bladder Infection "I had cystitis and was put on Macrobid for 5 days, only to find out it didn’t do a thing for the infection. My Dr. gave me an injection of Rocephin in the office and suggested Keflex for 7 days, three times a day (500 mg). The Rocephin gave me a stomach ache and diarrhea, then I took Keflex, and it made me queasy the rest of the day. The second pill I was fine and have remained side effect-free since then. I finish my course tomorrow but still feel the cramping and mild pain from a UTI, so I’m not sure this antibiotic worked either. We’ll see!"
- Anonymous
- November 12, 2020
For Bacterial Infection "I had an infection on my nose. I was happy how Keflex cleared up, but the side effects were terrible... stomach cramps, gas. I was down for 3 days."
- Sta...
- Taken for less than 1 month
- September 24, 2021
For Skin or Soft Tissue Infection "Very bad reaction to this medication. Multiple bouts of diarrhea and stomach cramps."
See also:
More about Keflex (cephalexin)
- Keflex consumer information
- Check interactions
- Compare alternatives
- Reviews (91)
- Drug images
- Side effects
- Dosage information
- Patient tips
- During pregnancy
- Support group
- Drug class: first generation cephalosporins
- Breastfeeding
For Bladder Infection "Took a 500 mg dose of Keflex twice a day for one week - I had a UTI. Side effects were diarrhea, headaches, felt depressed, upset stomach, and nausea. Now I’m having stomach cramping. Just hope the urinary tract infection I had is gone after taking this strong antibiotic."