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A 43-year-old member asked:

what can i take to treat a uti if i am allergic to penicillin?

2 doctor answers6 doctors weighed in
Dr. John Overholt
Allergy and Immunology 26 years experience
Several choices: Sulfonamides (bactrim, septra) and flouroquinalones (cipro) are good choices. Fyi- up to 90% of people who carry a diagnosis of penicillin allergy are not really penicillin allergic. An allergist can test you for penicillin allergy. A negative test could make your life lots easier.
Dr. George Klauber
Specializes in Pediatric Urology
Agree with Dr. Overholt. MacroBid is another excellent urinary antibacterial medication.
Jul 28, 2012
Dr. Michael Ein
Infectious Disease 48 years experience
See below: It depends on what type of reaction you had and what bacteria is causing your infection. If you only had a penicillin drug rash you can take cephalosporins. Regardless of reaction you can take Cipro (ciprofloxacin) or Levaquin or septra /bactrim . The infecting bacteria has to be susceptible to the antibiotic chosen.
Dr. Martin Raff
Dr. Martin Raff commented
Infectious Disease 56 years experience
Would suggest avoiding Septra/Bactrim in anyone with a predisposition to allergic reactions to medication. Sulfonamides are notorious for severe allergic reactions and if there is an alternative, would prefer that first. Otherwise Dr. Ein's suggestions are perfect.
Jun 21, 2013

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