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## Sinex (Oxymetazoline) ### Overview Sinex is a topical nasal decongestant that works by constricting blood vessels in the nasal mucosa, thereby reducing swelling and congestion. It is available as a nasal spray. ### Primary Indications * Temporary relief of nasal congestion due to the common cold, hay fever, or other upper respiratory allergies. ### Adult Dosing * **Nasal Spray (0.05%):** 2 to 3 sprays in each nostril every 10 to 12 hours as needed. * **Maximum Daily Dose:** Do not exceed 2 doses in a 24-hour period. ### Pediatric Dosing * **Children 6 to under 12 years:** 2 to 3 sprays in each nostril every 10 to 12 hours as needed. * **Children under 6 years:** Use is not recommended without consulting a healthcare provider. ### 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 discomfort, stinging, burning, dryness, sneezing, rebound congestion (rhinitis medicamentosa) with prolonged use. * **Less Common:** Insomnia, nervousness, dizziness, headache, palpitations, increased blood pressure. ### Key Drug Interactions * **MAO Inhibitors (and within 14 days of stopping):** May cause hypertensive crisis. * **Beta-blockers:** May potentially increase blood pressure. ### Monitoring * Monitor for signs of rebound congestion or overuse. * Monitor blood pressure in patients with hypertension, especially with frequent or prolonged use. ### Clinical Pearls * Limit use to a maximum of 3 consecutive days to avoid rebound congestion (rhinitis medicamentosa). * Advise patients to blow their nose gently before administration. * Tilt head slightly forward when administering the spray. *** **Disclaimer:** This information is intended for clinical use and is not a substitute for professional medical advice. Always consult the most current prescribing information and institutional protocols before administering any medication.