Compare Keflex vs. Monurol

Head-to-head comparisons of medication uses, side effects, ratings, and more.

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Keflex (cephalexin)

Prescription only

Monurol (fosfomycin)

Prescription only
Treats bacterial infections.

Keflex (cephalexin) is good for treating many bacterial infections, and is available as a generic.

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3.7/ 5 average rating with 686 reviewsforKeflex
Treats urinary tract infections.

Monurol (fosfomycin) is a good antibiotic for treating urinary tract infections.

Upsides
  • Available in generic.
  • Available in different forms: tablet, capsule, and suspension.
  • Used to treat many types of bacterial infections.
  • Can be taken with or without food.
  • Generally few side effects compared with other antibiotics.
  • Monurol (fosfomycin) is good at treating the most common causes of urinary tract infections in women.
  • You only need to take 1 dose of this medicine for treatment of your urinary tract infection.
Downsides
  • Can cause diarrhea.
  • You may need to take Keflex (cephalexin) 2 to 4 times a day, which can be hard to remember.
  • If you're allergic to penicillins or other antibiotics, you might not be able to take this medicine.
  • Although rare, Monurol (fosfomycin) can cause a severe allergic reaction in some people.
  • If you are breastfeeding, you might not be able to take this medicine.
  • It comes in a powder that needs to be mixed with water before taking by mouth.
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Used for
Dosage forms
  • Pill
  • Liquid
  • Powder for solution
Price
Lowest price
$10.00
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Lowest price
$100.35
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Reviews
686 reviews so far
64%
saidit'sworth it
48%
saiditworked well
14%
saidit'sa big hassle

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Side effects
The Keflex (cephalexin) FDA package insert doesn’t have numbers about how common side effects are.
10possible side effects
  • Diarrhea
    10%
  • Headache
    10%
  • Vaginal itching, pain, or discharge
    8%
  • Nausea
    5%
  • Stuffy and runny nose
    5%
  • Back pain
    3%
  • Painful menstruation
    3%
  • Sore throat
    3%
  • Dizziness
    2%
  • Feeling weak and without energy
    2%
See more detailed side effects
Risks and risk factors
  • Diarrhea
  • New infections while taking Keflex (cephalexin)
    • Weakened immune system
    • Not taking Keflex (cephalexin) correctly
  • Allergic reaction
    • History of penicillin or cephalosporin allergies
See more detailed risks and warnings
  • Diarrhea
See more detailed risks and warnings
Learn more about Keflex (cephalexin)
Learn more about Monurol (fosfomycin)