Yes, You Must Rinse and Spit After Using Symbicort
You should rinse your mouth with water and spit it out immediately after each dose of Symbicort to reduce the risk of oral thrush (fungal infection) and minimize systemic absorption of the corticosteroid. This is explicitly stated in the FDA-approved drug label and supported by national asthma guidelines 1, 2.
Why This Matters
The inhaled corticosteroid component (budesonide) in Symbicort deposits 50-80% of the actuated dose in your oropharynx (mouth and throat area) 2. Without rinsing:
- Oral thrush (candidiasis) becomes significantly more likely - a fungal infection causing white patches, soreness, and discomfort in your mouth
- Increased systemic absorption occurs when you swallow the deposited drug, potentially leading to more systemic side effects over time
- Dysphonia (hoarse voice) and throat irritation are more common
The Correct Technique
Timing is critical - rinse immediately after completing your dose (both puffs). Research shows that:
- Immediate rinsing removes approximately 73% of residual drug
- Waiting just 1 minute reduces effectiveness to 27-51% removal
- Waiting 10 minutes removes only 5-8% of the drug 3, 4
The proper procedure 1:
- After taking both puffs of Symbicort (your complete dose)
- Rinse your mouth thoroughly with water
- Spit the water out - do not swallow it
- No need for mouthwash - plain water is equally effective 5
Duration and Method
You don't need to rinse for an extended period. Studies show that:
- 5 seconds of rinsing is as effective as 10 seconds 3, 4
- Combining gargling and rinsing doesn't significantly improve removal over rinsing alone
- The key factor is immediacy, not duration
Common Pitfalls to Avoid
Don't skip this step - approximately 30% of patients fail to rinse properly after inhaled corticosteroids, often because they weren't adequately counseled by healthcare providers 6. This significantly increases your risk of oral candidiasis.
Don't swallow the rinse water - the entire purpose is to remove the drug from your mouth, not ingest it.
Don't wait - the drug begins absorbing into your oral mucosa immediately. Every minute you delay dramatically reduces the effectiveness of rinsing.
Clinical Significance
While mouth rinsing primarily prevents local side effects (thrush, hoarse voice, sore throat), many patients are unaware it also reduces systemic absorption 6. The FDA drug label specifically mandates this instruction because oral thrush is a recognized adverse effect of Symbicort 1.
If you develop oral thrush despite proper rinsing, contact your healthcare provider. This may require antifungal treatment or adjustment of your inhaler technique or device type.
The evidence consistently demonstrates that this simple 5-second intervention after each dose substantially reduces preventable complications from your asthma medication 2, 1, 3, 4.