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# Sinex (oxymetazoline)
## Overview
Oxymetazoline is a topical alpha-adrenergic agonist that causes vasoconstriction of the nasal mucosa, 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 daily dose:** Not explicitly defined, but prolonged use beyond 3 days should be avoided.
## Pediatric Dosing
* **Children 6 to under 12 years:** 1-2 sprays in each nostril every 10-12 hours as needed.
* **Children under 6 years:** Safety and efficacy not established. Consult pediatrician.
## Dose Adjustments
No specific dose adjustments are typically required for hepatic or renal impairment.
## Contraindications
* Hypersensitivity to oxymetazoline or any component of the formulation.
* Patients taking or who have taken MAO inhibitors within the past 14 days.
## Adverse Effects
* **Common:** Nasal burning, stinging, dryness, irritation. Sneezing.
* **Rebound congestion (rhinitis medicamentosa):** Occurs with prolonged or excessive use.
* **Systemic effects (rare but serious):** Hypertension, palpitations, tachycardia, insomnia, nervousness, headache.
## Key Drug Interactions
* **Monoamine Oxidase Inhibitors (MAOIs):** Concomitant use or use within 14 days of MAOI therapy can lead to severe hypertension.
* **Other sympathomimetic agents:** May potentiate systemic pressor effects.
## Monitoring
* Monitor for signs of rebound congestion or local irritation with prolonged use.
* Monitor blood pressure and heart rate, especially in patients with cardiovascular disease or if systemic absorption is suspected.
## Clinical Pearls
* Limit use to a maximum of 3 consecutive days to prevent rebound congestion.
* Administer by tilting the head back slightly before spraying.
* Blow nose gently after spraying.
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*This information is intended for healthcare professionals. Always verify current prescribing information with the manufacturer's package insert or a reliable drug information resource before making clinical decisions.*
