Allergy to Your Car? A Not So Unusual Case

dog allergy treatment nycI had an interesting case yesterday in the office. A patient I evaluated fordog allergy a year ago, who has been on mysublingual allergy drops for a year, thought she was relapsing.

I was worried too: it didn’t make sense that the patient, I’ll call Jill, was doing so well on herallergy drops for her dog allergy and then all of a sudden she was having severe trouble breathing.

Jill came into the office to be examined and gave me the scenario: it seemed that when she was at home playing with her dog ‘Cupcake’ she didn’t notice any of her prior allergy symptoms, such as sneezing, itchy eyes or the worst one- difficulty breathing. However, when she was in the car taking Cupcake for rides with her she was experiencing chest tightness – a symptom she used to experience while being around dogs. After examining Jill I felt she needed anasthma inhaler to clear up her lung congestion.

But I was really perplexed – were theallergy drops not working anymore? That would be unusual since for almost a year she was responding so well. Did she develop a new allergy – to pollen or mold? This was a definite possibility and would require additional testing.

The Car Clue

The one clue to Jill’s story was that her allergic reaction seemed occur mainly in the car. Now, she frequently rode with Cupcake in the backseat for company and so Cupcake seemed to be the culprit; this could make sense since if she was still allergic to the dog being in an enclosed space would clearly intensify the reaction.

But then Jill gave me a key piece of information: she did remember a few times that she developed shortness of breath in the car when Cupcake wasn’t in the car – hmmm? Now I began to wonder if it wasn’t somethingin the car that was triggering the reaction. I asked Jill if it was a new car as new cars have a strong chemical smell. She said no, but she did mention that she did have one of the car air fresheners hanging from her mirror to get the “dog smell” from lingering in the car.

That was the Ah Ha moment.A ir fresheners contain up to 100 different chemicals which can cause irritant and allergic reactions.

The main chemical offender in many air fresheners arephthalates. Phthalates have been known to cause a range of symptoms: headaches, irregular heartbeats, diarrhea and allergic reactions. The tricky thing is that some companies promote their products as natural or unscented, yet still have been found to contain phthalates. These air fresheners should only be placed in well-ventillated areas – but that’s the catch-22, they are meant to mask foul odors and unfortunately many cab drivers in New York are using them.

The good news is that my patient Jill ditched the car air freshener and her asthmatic symptoms disappeared. Cupcake is back in everyone’s good graces – as are theallergy drops.

dog allergy treatment nyc– Dr. Dean Mitchell
Mitchell Medical Group, NYC & Long Island

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