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## Oxymetazoline Nasal Spray (Sinex) ### Overview Oxymetazoline is a topical alpha-adrenergic agonist that acts as a vasoconstrictor. ### Primary Indications * Temporary relief of nasal congestion due to the common cold, hay fever, or other upper respiratory allergies. ### Adult Dosing * **Dosage:** 2 sprays in each nostril every 10-12 hours. * **Maximum Duration:** Do not exceed 3 days of use. ### Pediatric Dosing * **Children 6 to under 12 years:** 2 sprays in each nostril every 10-12 hours. Maximum duration of use is 3 days. * **Children under 6 years:** Not recommended. Consult a pediatrician. ### Dose Adjustments No specific dose adjustments are typically required for renal or hepatic impairment. ### Contraindications * Hypersensitivity to oxymetazoline or any component of the formulation. * Patients with narrow-angle glaucoma. ### Adverse Effects * **Common:** Nasal burning, stinging, sneezing, increased nasal discharge. * **Less Common:** Dryness of the nose, headache, dizziness, insomnia, palpitations, increased blood pressure. * **Rebound Congestion (Rhinitis Medicamentosa):** Occurs with prolonged or excessive use, leading to chronic nasal congestion. ### Key Drug Interactions * **MAO Inhibitors (and within 14 days of stopping):** May cause hypertensive crisis. * **Tricyclic Antidepressants:** May potentiate the pressor effect of oxymetazoline. * **Beta-blockers:** May cause severe hypertension. ### Monitoring * Monitor for rebound congestion with prolonged use. * Monitor blood pressure in patients with pre-existing hypertension, especially with frequent or prolonged use. ### Clinical Pearls * Limit use to 3 days to prevent rebound congestion (rhinitis medicamentosa). * If congestion persists after 3 days, discontinue use and consult a healthcare provider. * Administer by tilting head back slightly before spraying into each nostril. *** *Disclaimer: This information is intended for healthcare professionals and does not replace professional medical advice. Always consult the most current prescribing information and relevant guidelines before making any treatment decisions.*