Astelin is a prescription nasal spray that contains the active ingredient azelastine hydrochloride, an antihistamine medication. This nasal spray can be used to alleviate nasal allergy symptoms in patients aged five years or older. Before beginning treatment with this medication, patients should discuss Astelin nasal spray side effects with a doctor.
Unpleasant Oral Taste
In clinical trials for this medication, nearly 20 percent of treated patients experienced a bitter taste within the mouth, according to RxList. An unpleasant taste within the mouth typically occurs immediately after treatment with Astelin nasal spray and can contribute to upset stomach symptoms in certain patients. This side effect of Astelin nasal spray is temporary but can recur following subsequent dosing.
Nasal Irritation
Astelin nasal spray is administered as a liquid spray to the inside of each nostril. Following treatment, certain patients can experience nasal irritation as a side effect. Nasal irritation symptoms typically include burning, stinging or discomfort, Drugs.com warns. Use of this medication can initiate a sudden or severe sneezing attack or mild nosebleed in certain patients. Severe or persistent nasal irritation or nosebleeds can indicate a serious reaction to this medication, and affected patients should seek prompt medical care.
Headache or Fatigue
Headache or fatigue can occur as side effects of Astelin nasal spray in certain patients, PDRHealth reports. Headache pain is typically mild and may be localized to the center of the forehead. Patients who exhibit headache or fatigue symptoms following Astelin nasal spray treatment can have difficulty remaining active and alert while at work or school. A doctor may recommend an over-the-counter pain medication to alleviate headache side effects in certain patients during treatment with Astelin.
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