Nasarel Side Effects

Generic Name: flunisolide nasal

Note: This page contains side effects data for the generic drug flunisolide nasal. It is possible that some of the dosage forms included below may not apply to the brand name Nasarel.

It is possible that some side effects of Nasarel may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

For the Consumer

Applies to flunisolide nasal: nasal spray

Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Aftertaste; cough; nasal burning, dryness, or stinging; nausea; nosebleed; sore throat.

Seek medical attention right away if any of these SEVERE side effects occur while taking flunisolide nasal (the active ingredient contained in Nasarel)

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); decreased sense of smell; excessive sneezing; muscle weakness; nasal discomfort or irritation; repeated nosebleeds; unusual weight gain, especially in the face; white patches in the mouth, nose, or throat.

For Healthcare Professionals

Applies to flunisolide nasal: nasal spray


Flunisolide has been generally well tolerated and, due to its route of administration, has not been inclined to produce the adverse effects generally associated with systemic corticosteroids. The most frequent complaints have been related to nasal mucus membrane irritation.


Gastrointestinal side effects have included nausea and vomiting in less than 5% of patients. Bitterness and/or bad taste occurred more frequently.


Respiratory side effects have included nasal irritation, burning and stinging, congestion, epistaxis, sneezing, and rarely, nasal septal perforations. Temporary or permanent loss of the sense of smell and taste have occurred with both oral inhalation and intranasal formulations.

Nervous system

Nervous system side effects have been generally limited to headache, which occurred in less than 5% of patients.


Endocrine side effects have rarely included suppression of the hypothalamic-pituitary-adrenal axis. The risk of adrenal suppression has been less than that associated with systemic corticosteroids and was generally only of concern when using higher than recommended dosages or in patients who may be particularly sensitive.


Dermatologic side effects have included rare reports of rash.

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