First generation antihistamines, such as diphenhydramine and fexofenadine can cause more severe impairment when combined with alcohol than being legally drunk, according to researchers from the University of Iowa.
One of the main side effects of antihistamines is a feeling of sedation, according to Columbia University’s health information website, Go Ask Alice.
If your primary symptom is a stuffed up nose, you can also ask your doctor about decongesting nasal sprays.
Most require a prescription, but Nasacort is one that just became available over the counter.
With or without a decongestant, Allegra, Claritin, and Zyrtec are all antihistamines, meaning they calm down your body's immune reaction to allergens like pollen or animal dander.
"They have different active ingredients but are all in the same family of drugs," Dr.
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Sakina Bajowala, an Illinois-based allergist, explains. "They are all considered to be non-sedating or low-sedating anti-histamines (sic), and they are all very effective." That said, they do have some very slight differences — which probably aren't noticeable to every user. Claritin is long-acting, with effects that last for 24 hours.