Is rinsing the mouth necessary after using Corticosteroid (CS) inhalers?

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Last updated: April 9, 2025View editorial policy

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From the Guidelines

Rinsing your mouth with water after using corticosteroid inhalers is a crucial step in preventing local side effects, such as oral thrush, hoarseness, and sore throat, as recommended by the most recent and highest quality study 1. To minimize the risk of these side effects, it is essential to rinse your mouth thoroughly with water after each use of corticosteroid inhalers, such as fluticasone (Flovent), budesonide (Pulmicort), beclomethasone (QVAR), or mometasone (Asmanex), and then spit out the water without swallowing it. Some healthcare providers also suggest brushing your teeth afterward. The importance of rinsing your mouth after using corticosteroid inhalers is highlighted in several studies, including one published in the Journal of Allergy and Clinical Immunology 1, which emphasizes the need to reduce local side effects, such as oral thrush (candidiasis), cough, and dysphonia. Using a spacer device with your metered-dose inhaler can also help reduce medication deposition in your mouth and throat, further decreasing the risk of these side effects while improving medication delivery to your lungs, as noted in another study 1. Key points to consider:

  • Rinse your mouth with water after each use of corticosteroid inhalers
  • Spit out the water without swallowing it
  • Brush your teeth afterward, if recommended by your healthcare provider
  • Use a spacer device with your metered-dose inhaler to reduce medication deposition in your mouth and throat By following these steps, you can minimize the risk of local side effects associated with corticosteroid inhalers and ensure the safe and effective management of your asthma or chronic obstructive pulmonary disease (COPD) symptoms.

From the FDA Drug Label

If oropharyngeal candidiasis develops, it should be treated with appropriate local or systemic (i. e. oral) antifungal therapy while still continuing therapy with budesonide inhalation suspension, but at times therapy with budesonide inhalation suspension may need to be temporarily interrupted under close medical supervision. Rinsing the mouth after inhalation is advised [see Warnings and Precautions (5.1)] . Patients should rinse the mouth after inhalation of budesonide inhalation suspension.

Rinsing the mouth after inhalation of Corticosteroid Inhalers is advised to prevent oropharyngeal candidiasis. This is a recommended practice when using budesonide inhalation suspension, as stated in the drug label 2 and 2. The same advice is also given in 2.

From the Research

Importance of Rinsing Mouth after Corticosteroid Inhalers

  • Rinsing the mouth after using corticosteroid inhalers is effective in preventing local adverse effects such as hoarseness and oropharyngeal candidiasis 3.
  • A study found that immediate gargling and rinsing after inhalation is most useful for the removal of drugs following inhalation of corticosteroids 3.
  • The amount of drugs removed by mouth washing is significantly associated with the time lag between inhalation and mouth washing 3.

Implementation of Mouth Rinsing

  • A study found that almost one-third of patients reported a suboptimal mouth rinsing procedure after using an inhaled corticosteroid 4.
  • Receiving advice on mouth rinsing from a healthcare professional increased the likelihood of correct implementation and improved patient understanding of the rationale 4.
  • Patients were more likely to report their rinsing procedure had a positive impact if they had experienced oral candidiasis or sore mouth/throat 4.

Risk of Oral Candidiasis

  • Inhaled corticosteroids increase the risk of oral candidiasis, with the relative risk being highest in the first 3 months after therapy initiation 5.
  • A study found that the amount of Candida spp. was significantly greater in asthmatic patients taking inhaled steroids compared with those who were not 6.
  • The amount of isolated Candida was significantly greater in asthmatic patients treated with fluticasone than in those treated with beclomethasone 6.

Treatment of Oral Candidiasis

  • Gargling with amphotericin B is effective in treating oral candidiasis in asthmatic patients treated with inhaled steroids 6.
  • Standard first- and second-line antifungal medications can easily and safely be prescribed by dermatologists for the treatment of oral candidiasis 7.

References

Guideline

Guideline Directed Topic Overview

Dr.Oracle Medical Advisory Board & Editors, 2025

Research

Implementation of mouth rinsing after use of inhaled corticosteroids in Australia.

International journal of clinical pharmacy, 2021

Research

Oral candidiasis associated with inhaled corticosteroid use: comparison of fluticasone and beclomethasone.

Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology, 2003

Research

Practical Update on Treatment of Oral Candidiasis.

Journal of drugs in dermatology : JDD, 2024

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.

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