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# Sinex (oxymetazoline)
## Overview
Oxymetazoline is a topical alpha-adrenergic agonist that causes vasoconstriction of nasal mucosal blood vessels, reducing swelling and congestion.
## Primary Indications
Nasal congestion associated with the common cold, allergic rhinitis, or sinusitis.
## Adult Dosing
* **Nasal Spray:** 2 sprays in each nostril every 10-12 hours as needed.
* **Maximum:** Do not exceed recommended dose or frequency. Limit use to a maximum of 3 consecutive days to avoid rebound congestion.
## Pediatric Dosing
* **Children 6-11 years:** 1-2 sprays in each nostril every 10-12 hours as needed.
* **Children under 6 years:** Safety and efficacy not established. Consult a pediatrician.
## Dose Adjustments
No dose adjustments are typically required for hepatic or renal impairment due to minimal systemic absorption.
## Contraindications
* Hypersensitivity to oxymetazoline or any component of the formulation.
* Patients using or who have used MAO inhibitors within the past 14 days.
## Adverse Effects
* **Common:** Nasal stinging, burning, dryness, sneezing.
* **Less Common:** Rebound nasal congestion (rhinitis medicamentosa) with prolonged use, headache, dizziness, palpitations, insomnia.
## Key Drug Interactions
* **MAO Inhibitors:** Concomitant use can lead to hypertensive crisis. Avoid use in patients taking MAO inhibitors.
* **Tricyclic Antidepressants (TCAs):** May potentiate the pressor effects of oxymetazoline.
## Monitoring
* Monitor for signs of rebound congestion (worsening congestion after initial relief).
* Monitor blood pressure, especially in patients with cardiovascular disease.
## Clinical Pearls
* Limit use to 3 days to prevent rhinitis medicamentosa.
* If congestion persists beyond 3 days, re-evaluate the diagnosis and consider alternative treatments.
* Administer as directed; avoid spraying directly onto the septum.
**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and local protocols for definitive guidance.
