Can Hay Fever Medications Make Atrial Fibrillation Worse?

Thanks so much for reaching out, and I can certainly understand your concern given how long you've been managing your AF.

The good news is that the hay fever treatments you're using are very unlikely to be making your atrial fibrillation worse. This is especially true since you're using a nasal spray and an eye drop, which aren't absorbed as well systemically compared to oral medications. 

Why Your Allergy Medications Are Unlikely Culprits

The key point with all of your allergy products is that they work locally, right where you apply them, with very little of the drug getting into your bloodstream.

Fluticasone propionate/azelastine is a nasal spray that contains a steroid and an antihistamine. It has a very low absolute bioavailability, meaning only a tiny fraction of each dose reaches your circulation, far too little to have the heart or blood pressure effects sometimes seen with long-term oral steroids like prednisone.

Sodium cromoglycate (cromolyn) eye drops are perhaps the gentlest of all. Cromolyn is a mast cell stabilizer that stays almost entirely in the eye, is barely absorbed, and has no known effects on heart rhythm. None of these is known to interact with bisoprolol either, so your beta-blocker should keep working as intended.

It's worth knowing that some allergy medicines can be a problem for AF, and they're worth avoiding. Oral and nasal decongestants such as pseudoephedrine, phenylephrine, or oxymetazoline — including combination 'allergy-D' products that contain them — are stimulants that can raise heart rate and blood pressure and are well known to aggravate arrhythmias. that can raise heart rate and blood pressure and are well known to aggravate arrhythmias. If you ever reach for an over-the-counter allergy or cold remedy, that's the ingredient list to check, but nothing you've listed falls into that category.

What May Actually Be Going On

Your observation that AF is worse in summer is interesting, and there are more likely explanations than your medications, Heat and dehydration, changes in activity, alcohol, disturbed sleep, and even the physiological stress of poorly controlled allergy symptoms themselves can all act as AF triggers in susceptible people. in susceptible people.

That said, the most important thing here isn't the hay fever medicines at all: you mention you've now been in persistent AF for over a month, and that's something your primary care doctor or cardiologist should know about promptly if they don't already.

Being in AF continuously changes the conversation around rate control, rhythm control, and stroke prevention, so please do get reviewed soon rather than waiting for your next routine appointment. In the meantime, keep taking your bisoprolol as prescribed and don't stop or change anything on your own. I hope this puts your mind at ease about the allergy treatments, feel free to reach back out if you have any other questions!

Final Words

Thanks again for your question. We appreciate you using HelloPharmacist!