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# Sinex (Oxymetazoline)
## Overview
Oxymetazoline is a topical decongestant that acts as an alpha-adrenergic agonist. It causes vasoconstriction of the nasal mucosa, which reduces swelling and congestion.
## Primary Indications
* Nasal congestion associated with the common cold, allergic rhinitis, or sinusitis.
## Adult Dosing
* **Nasal Spray:** 0.05%
* Administer 2-3 sprays in each nostril every 10-12 hours as needed.
* Do not exceed 2 doses in 24 hours.
## Pediatric Dosing
* **Nasal Spray (0.025%):**
* Children 6 to under 12 years: 2-3 sprays in each nostril every 10-12 hours as needed.
* Do not exceed 2 doses in 24 hours.
* **Nasal Spray (0.05%):**
* Children 12 years and older: Same as adult dosing.
* **Under 6 years:** Safety and efficacy have not been established. Use is not recommended.
## Dose Adjustments
* No dose adjustments are typically needed for hepatic or renal impairment when used topically as directed.
## Contraindications
* Hypersensitivity to oxymetazoline or any component of the formulation.
* Patients with narrow-angle glaucoma.
## Adverse Effects
* **Common:** Nasal discomfort, burning, stinging, dryness, sneezing.
* **Less Common/Serious:** Rebound congestion (rhinitis medicamentosa) with prolonged use, systemic effects (hypertension, palpitations, headache, nervousness) especially with overuse or in susceptible individuals.
## Key Drug Interactions
* **Monoamine Oxidase Inhibitors (MAOIs):** Concomitant use may cause a hypertensive crisis. Avoid use within 14 days of MAOI therapy.
* **Tricyclic Antidepressants (TCAs):** May potentiate the pressor effects of oxymetazoline.
* **Beta-blockers:** May antagonize the blood pressure lowering effects of beta-blockers or potentiate pressor response.
## Monitoring
* Monitor for signs of rebound congestion or systemic side effects, especially with prolonged or excessive use.
* Blood pressure should be monitored in patients with pre-existing hypertension or cardiovascular disease.
## Clinical Pearls
* Limit use to a maximum of 3 consecutive days to minimize the risk of rebound congestion.
* Advise patients to avoid contact with eyes.
* Instruct patients on proper nasal spray technique.
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*This information is intended for healthcare professionals and does not substitute for professional medical advice. Always consult the current prescribing information and a qualified healthcare provider for any medical decisions.*
