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# Isoxsuprine Hydrochloride
## Overview
Isoxsuprine hydrochloride is a peripheral vasodilator. Its mechanism of action is not fully understood but may involve direct relaxation of vascular smooth muscle.
## Primary Indications
* Treatment of peripheral vascular disease, including intermittent claudication and Raynaud's disease.
* Improvement of cerebrovascular insufficiency.
## Adult Dosing
* **Oral:** 10 mg to 20 mg three to four times daily. Dosing may be titrated upward based on patient response and tolerance, not to exceed 40 mg per dose or 120 mg per day.
## Pediatric Dosing
* There is no established pediatric dosing for isoxsuprine hydrochloride.
## Dose Adjustments
* No specific dose adjustments are typically required for hepatic or renal impairment. However, caution and close monitoring are advised in patients with severe impairment.
## Contraindications
* Hypersensitivity to isoxsuprine.
* Should not be administered intravenously.
* Use in patients with congenital heart disease.
* Should not be used in the immediate post-operative period.
## Adverse Effects
* **Common:** Nausea, vomiting, stomach upset, dizziness, drowsiness, weakness, flushing, headache, rash.
* **Less Common:** Hypotension, arrhythmias, blurred vision, nasal congestion, constipation, diarrhea.
## Key Drug Interactions
* **Antihypertensives:** Isoxsuprine may potentiate the effects of antihypertensive medications, leading to additive hypotension.
* **Other Vasodilators:** Concurrent use may increase the risk of profound hypotension.
## Monitoring
* Blood pressure and heart rate.
* Signs and symptoms of peripheral vascular disease.
* Patient tolerance of the medication, particularly gastrointestinal and neurological side effects.
## Clinical Pearls
* The therapeutic benefit of isoxsuprine in peripheral vascular disease is often modest and may take several weeks to become apparent.
* It is crucial to advise patients to report any new or worsening symptoms promptly.
* Isoxsuprine should be administered orally. Intravenous administration is contraindicated due to potential for serious adverse events.
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**Disclaimer:** This information is intended for clinical use and does not substitute for comprehensive drug information resources. Always consult the current prescribing information and relevant literature for complete details and to verify dosages and safety information before administration.
