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Astelin Side Effects

Generic Name: azelastine nasal

Note: This page contains information about the side effects of azelastine nasal. Some of the dosage forms included on this document may not apply to the brand name Astelin.

In Summary

Common side effects of Astelin include: drowsiness, bitter taste, and dysgeusia. Other side effects include: epistaxis. See below for a comprehensive list of adverse effects.

For the Consumer

Applies to azelastine nasal: nasal spray

In addition to its needed effects, some unwanted effects may be caused by azelastine nasal (the active ingredient contained in Astelin). In the event that any of these side effects do occur, they may require medical attention.

Major Side Effects

You should check with your doctor immediately if any of these side effects occur when taking azelastine nasal:

  • Blood in the urine
  • blurred vision or other change in vision
  • cough
  • eye pain
  • eye redness
  • hives, itching, or skin rash
  • rapid heartbeat
  • sores in the mouth or on the lips
  • tightness in the chest
  • troubled breathing

Minor Side Effects

Some of the side effects that can occur with azelastine nasal may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

More common:
  • Bitter taste in the mouth
  • drowsiness or sleepiness
Less common:
  • Bloody mucus or unexplained nosebleeds
  • burning inside the nose
  • dizziness
  • dryness of the mouth
  • headache
  • muscle aches or pain
  • nausea
  • sore throat
  • sudden outbursts of sneezing
  • unusual tiredness or weakness
  • weight gain

For Healthcare Professionals

Applies to azelastine nasal: nasal spray


The most commonly reported adverse reactions were headache, bitter taste, sinusitis, and epistaxis.[Ref]


Common (1% to 10%): Epistaxis, nasal discomfort, upper respiratory infection, sneezing, nasal mucosal ulceration, sinusitis
Postmarketing reports: Nasal burning, throat irritation, dyspnea, paroxysmal sneezing[Ref]


Postmarketing reports: Anaphylactoid reaction[Ref]


Postmarketing reports: Application site irritation[Ref]

Nervous system

Very common (10% or more): Bitter taste (10%)
Common (1% to 10%): Headache, somnolence, dysgeusia
Postmarketing reports: Sweet taste, confusion, dizziness, nervousness, paraesthesia, parosmia, involuntary muscle contractions, disturbance or loss of sense of smell and/or taste[Ref]


Postmarketing reports: Atrial fibrillation, chest pain, hypertension, palpitations, tachycardia[Ref]


Very rare (less than 0.01%): Urticaria, pruritus, rash[Ref]


Postmarketing reports: Abdominal pain, nausea[Ref]


Common (1% to 10%): Fatigue
Postmarketing reports: Facial edema, tolerance[Ref]


Postmarketing reports: Blurred vision, xerophthalmia[Ref]


Postmarketing reports: Urinary retention[Ref]


1. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0

2. "Product Information. Astepro (azelastine nasal)." Meda Pharmaceuticals, Somerset, NJ.

3. "Product Information. Astelin (azelastine)." Carter Products, Cranbury, NJ.

Not all side effects for Astelin may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

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