Matthew F. Watto, MD: I’m Dr Matthew Frank Watto, here with my great friend and America’s primary care physician, Dr Paul Nelson Williams. Paul, are you ready to talk about rhinitis? 

Paul N. Williams, MD: I’m excited. It’s always the season to talk about rhinitis.

Watto: We had a great guest for this podcast, Rhinitis and Environmental Allergies with Dr Olajumoke Fadugba from Penn Medicine. She’s an allergist and immunologist. One of her pet peeves is when people just call everything “allergic rhinitis” because we should be calling it “chronic rhinitis,” if it’s chronic. That’s an umbrella term, and there are many buckets underneath it that people could fall into.

When you’re taking a history, you have to figure out whether it’s perennial (meaning it happens year round) because certain things can cause that. Cat dander is around all the time, so people with cats might have sinus symptoms all year. Dust mites are another one, and it’s pretty hard to avoid those. Those are some perennial allergens. 

Then there is allergic vs nonallergic rhinitis, which is something I hadn’t really put too much thought into. 

Williams: I didn’t realize exactly how nuanced it got. Nonallergic rhinitis can still be seasonal because changes in temperature and humidity can trigger the rhinitis. And it matters what medications you use for

Watto: Here are some ways you can try to figure out if rhinitis is allergic or nonallergic. Ask the patient if they have itchy eyes and are sneezing a lot. That can be more of an allergic rhinitis, but both allergic and nonallergic rhinitis have the congestion, the rhinorrhea, so you can’t figure it out based on that alone.

Dr Fadugba said that one clue that it might be nonallergic rhinitis is the age of onset. If the symptoms are later in onset (older age), then 30%-40% of rhinitis is nonallergic. If the patient has never had allergies and now all of a sudden they have new chronic sinus symptoms, it’s probably nonallergic rhinitis. It’s a diagnosis of exclusion.

I guess they need allergy testing?

Williams: If you want to make a definitive diagnosis, you need to rule it out. I suspect that you might be able to get away with some empirical treatment. If they get better, you can feel like a winner because getting booked in for allergy testing can be a little bit of a challenge.

Watto: The main treatment difference is that the oral antihistamines do not really seem to work for nonallergic rhinitis, but they can help with allergic rhinitis. Weirdly, the nasal antihistamines and nasal steroids do seem to work for both allergic and nonallergic rhinitis.

I don’t understand the mechanism there, but if you think someone might have nonallergic rhinitis, I wouldn’t go with the oral antihistamines as your first-line treatment. I would go with a nasal spray; you pretty much can’t go wrong with either an antihistamine or a steroid nasal spray.

Williams: We typically start with the nasal sprays. That’s kind of first-line for almost everybody, allergic or nonallergic. You’re probably going to start with an intranasal steroid, and then it’s kind of dealer’s choice what the patient can tolerate and afford. Sometimes you can get them covered by insurance, at least in my experience. 

I will say that this is one of the medications — like nicotine patches and other things — where we as doctors don’t really counsel patients on how to use it appropriately. So with our expert, we revisited the idea of the patient pointing the nasal spray laterally, toward their ear basically, and not spraying towards their brain. There should not be a slurping sound afterward, because “if you taste it, you waste it,” as the allergists and immunologists say. It’s supposed to sit up there and not be swallowed immediately. 

If your patient is sensitive to the floral flavor of some of the fluticasones (which I don’t mind so much as a user myself), then you can try mometasone or the other formulations. They are all roughly equivalent. 

Speaking of medications, which medications can cause rhinitis? Any meds we commonly use in primary care?

Williams: Apparently the combined hormonal oral contraceptives can do it. Also the phosphodiesterase 5 (PDE-5) inhibitors. Drugs that cause vasodilation can also do it. Some of the antihypertensives. I’ve seen beta-blockers and angiotensin-converting enzyme (ACE) inhibitors listed specifically, and some of the medications for benign prostatic hyperplasia (BPH). So there are a couple of medications that you can think about as a potential cause of rhinitis, although my suspicion is not going to be as high as for some of the other causes.

Watto: We mentioned medication treatments for patients who are really bothered by rhinorrhea, and maybe they are already on a steroid or an antihistamine.

You can try nasal ipratropium for people that have really prominent rhinorrhea. Dr Fadugba said that can work well, and it’s usually taken three or four times a day. I’ve had good success prescribing it for my patients. Another one that I have never prescribed, but that Dr Fadugba said is available over the counter, is intranasal cromolyn — a mast cell stabilizer. She said it can be beneficial.

Let’s say I had a cat allergy and I was going to visit Paul. I could use the intranasal cromolyn ahead of time to reduce rhinitis when I’m around the cats.

Paul, what about montelukast? I never know what to do with that one.

Williams: I’ve seen it prescribed as a last-ditch attempt to fix chronic rhinitis. Dr Fadugba said she only ever prescribes it for patients who have rhinitis symptoms and asthma and never just for chronic rhinitis because it doesn’t work. And also, there have been some new black-box warnings from the US Food and Drug Administration (FDA). So unless there’s a solid indication for it, montelukast is not something you should just prescribe to try to see if it will work. That’s probably not the right approach for this.

But if the patient has challenging control asthma, and as a component, challenging nasal symptoms as well, it might be a reasonable medication to try. 

Watto: And finally, Paul, how does climate change possibly have anything to do with rhinitis?

Williams: I feel like I’m just seeing more and more of the stuff every year. I don’t know if I’m more sensitive to it or because I’m having more symptoms myself, but it turns out the prevalence actually is going up.

We’re seeing more of it in part because it’s getting hotter outside, which is in turn worsening the production of allergens and increasing the allergen exposure and the severity of the symptoms that go along with it. More people are having more severe disease because the world is changing as a result of the stuff that we do. So fix that. But also be mindful and expect to see even more of these problems as you move forward in your careers. 

Watto: Dr Fadugba gave us so many great tips. You can listen to the full podcast episode here.