“Caffeine helps with sleepiness, as we all know, but it can also help with congestion,” says Dr. Parikh. Seasonal allergies can cause congestion and inflammation in the nasal passages and airways, causing coughing, a stuffy nose, and, in some cases, wheezing and shortness of breath, especially if you also have asthma.
But studies have found that caffeine can serve as a bronchodilator and is associated with better airway function in people with asthma and breathing issues.
The caffeine in coffee may help relieve the drowsiness caused by certain allergy medication, says Parikh. “Most allergy pills are antihistamines that make you sleepy. They help with symptoms, but a side effect of Benadryl, Claritin, Zyrtec, and Xyzal, among others, is drowsiness,” says Parikh.
Of course, you can work with your allergist to find nondrowsy options or topical remedies like a nasal spray or eye drops. “Those are a good option if you’re very sensitive and sleepy from the allergy pills,” Parikh says. “But the caffeine definitely helps, too.”
Sipping hot coffee — and hot beverages in general — may also help open up your nasal passageways and relieve the congestion that comes with allergies and the common cold.
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