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# Oxymetazoline (Sinex) ## Overview Oxymetazoline is a direct-acting alpha-adrenergic agonist that causes vasoconstriction of the nasal mucosa. This reduces 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 Duration:** Do not use for more than 3 consecutive days to avoid rebound congestion (rhinitis medicamentosa). ## Pediatric Dosing * **Ages 6 years and older:** 1-2 sprays in each nostril every 10-12 hours as needed. * **Ages younger than 6 years:** Safety and efficacy have not been established. Consult product labeling or 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 currently taking or have recently stopped (within 2 weeks) MAO inhibitors. ## Adverse Effects * **Common:** Nasal burning, stinging, dryness, sneezing. * **Less Common:** Rebound congestion, headache, dizziness, insomnia, palpitations. * **Rare/Serious:** Significant cardiovascular effects (hypertension, tachycardia) especially with overuse or systemic absorption. ## Key Drug Interactions * **Monoamine Oxidase Inhibitors (MAOIs):** Concomitant use can cause a hypertensive crisis. * **Other Sympathomimetics:** May potentiate cardiovascular effects. ## Monitoring * Monitor for signs of rebound congestion with prolonged use. * Monitor blood pressure and heart rate in patients with cardiovascular disease or with signs of systemic absorption. ## Clinical Pearls * Limit use to 3 days to prevent rhinitis medicamentosa. * Prime the pump before first use and if the product has not been used for several days. * Avoid spraying into the eyes. *** *This information is intended for healthcare professionals and does not substitute for professional clinical judgment. Always consult the most current prescribing information and relevant literature before making clinical decisions.*