Yes, you can safely take Dupixent (dupilumab) together with over-the-counter oral decongestants like pseudoephedrine or phenylephrine.
There are no known drug interactions or contraindications between Dupixent and oral decongestants, and they can be used concurrently without safety concerns. The FDA label for Dupixent does not list decongestants as contraindicated medications, and the only absolute contraindication is known hypersensitivity to dupilumab 1.
Key Points About This Combination
Safety Profile
No pharmacologic interaction exists between dupilumab (a monoclonal antibody targeting IL-4 receptor α) and sympathomimetic decongestants (α-adrenergic agonists). These medications work through completely different mechanisms and do not interfere with each other's metabolism or efficacy.
Real-world evidence demonstrates that patients on dupilumab commonly use concomitant medications including nasal sprays and other symptomatic treatments without adverse interactions 2.
Clinical Context
Dupilumab is approved for multiple type 2 inflammatory conditions including chronic rhinosinusitis with nasal polyps (CRSwNP), asthma, and atopic dermatitis 1, 3. Patients with these conditions frequently experience nasal congestion that may benefit from decongestant use while dupilumab addresses the underlying inflammation.
In fact, dupilumab treatment typically reduces the need for concomitant medications over time, including nasal sprays and other symptomatic treatments, as the underlying inflammatory disease comes under control 2.
Important Decongestant Considerations (Unrelated to Dupixent)
While safe to combine with Dupixent, oral decongestants have their own precautions:
Use Caution If You Have:
- Cardiovascular disease (arrhythmias, angina, coronary artery disease, cerebrovascular disease)
- Hypertension - pseudoephedrine causes small increases in systolic blood pressure (0.99 mmHg) and heart rate (2.83 beats/min); monitor blood pressure if hypertensive 4
- Hyperthyroidism
- Closed-angle glaucoma - oral decongestants may raise intraocular pressure 4
- Bladder neck obstruction
Common Side Effects:
- Insomnia, irritability, palpitations, loss of appetite, tremor 4
- These effects may be additive with caffeine or stimulant medications (e.g., ADHD medications) 4
Efficacy Note:
Pseudoephedrine is more effective than phenylephrine as an oral decongestant because phenylephrine is extensively metabolized in the gut, and its efficacy has not been well established 4.
Bottom Line
Proceed with using both medications together. The combination is safe from a drug interaction standpoint. Your main considerations should be the standard precautions for decongestant use (cardiovascular status, blood pressure) rather than any concern about interaction with Dupixent. If you have nasal congestion despite being on Dupixent, oral decongestants are an appropriate symptomatic treatment option, though you may find your need for them decreases as dupilumab takes full effect over several weeks to months.