Developed A UTI While Taking A Z-Pak

In our latest question and answer, the pharmacist discusses treatment options for someone who developed a UTI while taking azithromycin.

4 min read Updated Jun 2026 Read by 8,590 people
Developed A UTI While Taking A Z-Pak
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Shell asked

I am currently taking a Z-Pak and Medrol pack for bronchitis. I’m on day 3 for both! I now have a UTI, ugh! What now? What can be prescribed now? How should I proceed? So frustrated!!!! Please help if you can.

Jun 11, 2022
The quick answer
  • A UTI developing while taking azithromycin is uncommon since the antibiotic typically covers the most common bacteria that cause urinary tract infections. Your doctor needs to evaluate your situation since you may have a UTI caused by bacteria resistant to azithromycin, a different type of infection, or another medical condition with similar symptoms. A urine culture and sensitivity test can identify the specific bacteria causing the infection so your doctor can prescribe the most effective treatment for you.
A quick summary of Dr. Brian Staiger, PharmD's full answer below, condensed by AI from that answer only (not from any outside source). The pharmacist's answer is the source of record.
Medications in this answer — tap to explore

Hello and thanks for reaching out. I'm sorry to hear you're going through this! First and foremost, you want to reach out to your doctor regarding this. The situation you've described warrants evaluation since, while it is certainly possible to develop UTI-like symptoms while taking a Z-Pak (azithromycin), azithromycin is not typically used to treat or prevent most urinary tract infections.

Can A UTI Develop While Taking A Z-Pak?

Yes, it is possible to develop a UTI (urinary tract infection) while taking an antibiotic like azithromycin, although azithromycin itself is not generally thought of as an antibiotic that causes UTIs.

Z-Paks are used for a variety of infections, and it is true that azithromycin is considered a broad-spectrum antibiotic. However, broad-spectrum does not mean that it treats every type of infection, and azithromycin is not a standard antibiotic choice for most UTIs.

Antibiotics can also disrupt the normal balance of bacteria and yeast in the body, which is why they are associated with an increased risk of certain infections or complications.

These can include:

  • Clostridium difficile (i.e. C. diff-associated diarrhea)
  • Yeast infections

The reason azithromycin is not generally associated with directly causing a bacterial UTI is that UTIs are usually caused by bacteria entering and growing in the urinary tract. The most common cause is Escherichia coli (E. coli), and other bacteria, such as Klebsiella pneumoniae, can also be involved.

However, azithromycin is not usually relied upon for UTIs because it does not concentrate in the urine the way many typical UTI antibiotics do. So, even if you are currently taking azithromycin, it should not be assumed that it would protect you from developing a UTI or adequately treat one.

It's certainly possible that you've developed a UTI caused by bacteria not adequately treated by azithromycin, a drug-resistant strain, or even a completely different type of infection altogether.

Additionally, you could be experiencing a different medical condition where the symptoms are closely related, or even the same, as you would experience with a UTI. Examples include a yeast infection, vaginitis, urethritis, irritation, or certain sexually transmitted infections.

Treatment Options

It's hard to give a definitive treatment recommendation for your situation without knowing more about your symptoms, medical history, and whether a urine test has been completed.

Initial antibiotic therapy for UTIs is often empiric, meaning that certain antibiotics are selected based on the bacteria most likely to be causing the infection, commonly E. coli. However, azithromycin is not typically considered a first-line treatment option for uncomplicated UTIs.

In many cases, especially when symptoms are persistent, severe, unusual, or there is concern for resistance, a urine culture and sensitivity test may be completed. This helps determine exactly what type of bacteria is causing the problem and which antibiotics that bacteria is sensitive to.

So, the first step for you is to reach out to your doctor so they can confirm your diagnosis, which again, may be a UTI caused by bacteria not adequately treated by azithromycin, or another infection/condition altogether (e.g. a yeast infection, urethritis, vaginitis, etc...).

From there, they can determine what your best treatment option is, which may include a UTI-specific antibiotic. Common examples include:

  • Nitrofurantoin
  • Bactrim (sulfamethoxazole/trimethoprim)
  • Fosfomycin

Other antibiotics may be used in certain situations, depending on the type of infection, local resistance patterns, culture results, allergies, kidney function, pregnancy status, and whether the infection is considered uncomplicated or complicated. These may include options such as:

  • Cefpodoxime
  • Augmentin
  • Cefdinir
  • Ciprofloxacin
  • Levofloxacin

Fluoroquinolone antibiotics, such as ciprofloxacin and levofloxacin, are generally not preferred for simple uncomplicated UTIs when other appropriate options are available, but they may still be used in select cases when your doctor determines they are necessary.

When To Seek Care Promptly

You should contact your doctor promptly if you are having symptoms such as burning with urination, urinary frequency or urgency, pelvic discomfort, cloudy or foul-smelling urine, or blood in the urine.

You should seek more urgent medical attention if you develop fever, chills, back or flank pain, nausea/vomiting, worsening symptoms, confusion, or if you are pregnant, immunocompromised, or have kidney problems.

Final Words

I understand your frustration here!

I hope this answer helps give you some direction and that you start to feel better soon.

I didn't touch much on Medrol, which is a steroid. Long-term use of steroids can certainly increase the risk of infections. It is less likely that only 3 days into a Medrol Dose Pack would be the main factor here, but it is still something your doctor should be aware of when evaluating your symptoms.

Please feel free to contact us again with any further questions!

References & sources
  1. A survey on urinary tract infections associated with the three most common uropathogenic bacteria — PubMed
  2. Urinary Tract Infection — CDC
  3. Clostridium difficile infection and antibiotic-associated diarrhoea — PubMed
Glossary — Terms in This Answer
UTI
A urinary tract infection is an infection that develops in any part of the urinary system, including the bladder and urethra.
Z-Pak
A Z-Pak is a packaged course of azithromycin antibiotic pills typically taken over several days to treat infections.
Broad-spectrum antibiotic
A broad-spectrum antibiotic is a medication that is effective against many different types of bacteria rather than just a few specific ones.
Clostridium difficile
Clostridium difficile is a bacterium that can cause severe diarrhea and intestinal inflammation, often after antibiotic use.
Empiric
Empiric treatment means prescribing medication based on educated guesses about what is causing the illness rather than confirmed test results.
Urine culture and sensitivity test
A urine culture and sensitivity test identifies the specific bacteria causing a urinary tract infection and determines which antibiotics will work against it.
Medrol Dose Pack
A Medrol Dose Pack is a pre-measured course of methylprednisolone, a steroid medication used to reduce inflammation.
Steroid
A steroid is a medication that reduces inflammation and suppresses the immune system.
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Dr. Brian Staiger, PharmD
About the pharmacist

Dr. Brian Staiger, PharmD

Clinical Pharmacy

Doctor of Pharmacy, board certified clinical pharmacist (BCPS), American Herbalist Guild, Medication Therapy Management certified

Brian Staiger, PharmD, BCPS, is a licensed pharmacist with more than 13 years of experience across retail pharmacy, clinical pharmacy, medication safety, pharmacy program development, and healthcare administration. He is the founder of HelloPharmacist.com, where he helps patients...

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