Should a 13-month-old with oral candidiasis (thrush) secondary to amoxicillin (amoxicillin) therapy be switched to a different antibiotic?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: May 25, 2025View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

From the Guidelines

Yes, you should consider changing antibiotics for a 13-month-old with thrush from amoxicillin. Thrush (oral candidiasis) is a common side effect of antibiotics, particularly in young children, as antibiotics disrupt the normal oral flora allowing for overgrowth of Candida species [ 1 ]. If the bacterial infection being treated is responding well, you could switch to a narrower-spectrum antibiotic less likely to cause fungal overgrowth.

Treatment Options

  • Alongside changing the antibiotic, treat the thrush with nystatin oral suspension, as recommended by the Infectious Diseases Society of America [ 1 ].
  • Ensure the caregiver applies the antifungal medication properly by swabbing it around the mouth rather than just having the child swallow it.
  • Also recommend good oral hygiene and sterilization of pacifiers, bottles, or toys that go in the mouth to prevent reinfection.

Key Considerations

  • The choice of antibiotic should be based on the specific bacterial infection being treated and its susceptibility to different antibiotics.
  • It is essential to monitor the child's response to the new antibiotic and antifungal treatment to ensure that the infections are resolving [ 1 ].

Antifungal Treatment

  • For severe or persistent thrush, fluconazole oral suspension may be needed, as it is an effective treatment option for oropharyngeal candidiasis [ 1 ].

From the Research

Thrush and Antibiotics

  • A 13-month-old child has developed thrush after taking amoxicillin, which is a common antibiotic used to treat various bacterial infections.
  • The development of thrush, a fungal infection, may be a side effect of the antibiotic treatment, as it can disrupt the balance of normal flora in the body.

Alternative Antibiotics

  • Studies have shown that alternative antibiotics such as azithromycin and clarithromycin may be effective in treating certain infections while minimizing the risk of developing thrush or other fungal infections 2, 3, 4.
  • These antibiotics have been found to have improved tolerability and fewer gastrointestinal adverse effects compared to traditional macrolides like erythromycin 3, 5.

Considerations for Changing Antibiotics

  • When considering changing antibiotics, it is essential to weigh the potential benefits and risks of each option, including the risk of developing thrush or other fungal infections.
  • The choice of antibiotic should be based on the specific infection being treated, as well as the individual patient's medical history and other factors 5.
  • It is also important to note that some antibiotics, such as clarithromycin, may alter the vaginal flora, potentially increasing the risk of urinary tract infections and vaginal candidiasis in women 6.

Potential Next Steps

  • Consult with a healthcare professional to determine the best course of action for the child's specific situation.
  • Discuss the potential risks and benefits of changing antibiotics, as well as any other treatment options that may be available.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

Azithromycin and clarithromycin.

The Medical clinics of North America, 1995

Research

The newer macrolides. Azithromycin and clarithromycin.

Infectious disease clinics of North America, 1995

Research

The new macrolides. Azithromycin and clarithromycin.

The Western journal of medicine, 1994

Research

Clarithromycin-induced alterations in vaginal flora.

American journal of therapeutics, 2000

Related Questions

What is the indication for Erythromycin (Erythromycin)
What is the treatment for pharyngoamigdalitis (pharyngotonsillitis) in patients with allergies?
What is the difference between clarithromycin (Biaxin) and azithromycin (Zithromax)?
Is there cross-reactivity between Erythromycin (a macrolide antibiotic) and Doxycycline (a tetracycline antibiotic)?
What antibiotic can be used in a patient with allergies to Penicillin (PNC), Sulfa, and Macrobid, taking Tegretol (Carbamazepine), Sertraline, Oxazepam, Xanax (Alprazolam), and Buscopan (Hyoscine), with Impaired renal function?
What enzymatic conversions are impaired in a patient with numerous Burr cells (schistocytes) and normal plasma lactate levels?
What enzymes are most active in the immediate postprandial (after meal) state to promote glucose utilization and energy storage following a rapid rise in blood glucose?
What are the treatment options for insomnia (inability to stay asleep) characterized by sleep maintenance issues?
What enzyme change occurs in the liver for glucose production during a fasting state after over 12 hours without food or water, specifically in regards to gluconeogenesis and glycogenolysis?
What is the recommended duration to hold metoprolol (beta blocker) in a patient with symptomatic bradycardia (heart rate 40) after accidental overdose of metoprolol 25 milligrams (mg) twice daily (bid) instead of prescribed 12.5 mg bid for atrial fibrillation (fib)?
What can cause leukocytosis (White Blood Cell count elevation), anemia (low hemoglobin), microcytosis (Mean Corpuscular Volume reduction), thrombocytosis (elevated platelet count), and elevated C-Reactive Protein (CRP) in a morbidly obese 21-year-old female?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.