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# Isoxsuprine hydrochloride
## Overview
Isoxsuprine hydrochloride is a peripheral vasodilator.
## Primary Indications
* Treatment of peripheral arterial disease (PAD), including intermittent claudication.
* Treatment of cerebrovascular insufficiency.
*Note: The efficacy of isoxsuprine for these indications is not well-established and it is not FDA-approved for these uses in the United States. Its use may be more common outside the US.*
## Adult Dosing
* **Oral:** 10 mg to 20 mg three to four times daily.
* **Maximum:** Doses up to 40 mg four times daily have been reported in some literature, but higher doses may increase the risk of adverse effects.
## Pediatric Dosing
* No established pediatric dosing recommendations.
## Dose Adjustments
* No specific dose adjustments are typically recommended for hepatic or renal impairment, but caution is advised.
## Contraindications
* Hypersensitivity to isoxsuprine hydrochloride.
* Do not administer intravenously.
## Adverse Effects
* **Common:** Nausea, vomiting, gastric distress, dizziness, weakness, flushing, rash.
* **Cardiovascular:** Hypotension, tachycardia, palpitations.
* **Other:** Drowsiness.
## Key Drug Interactions
* **Antihypertensives:** Isoxsuprine may potentiate the effects of antihypertensive medications, leading to additive hypotension.
* **Other Vasodilators:** Concurrent use with other vasodilators may increase the risk of hypotension.
## Monitoring
* Blood pressure and heart rate.
* Symptoms related to peripheral circulation (e.g., claudication).
* Signs of adverse effects.
## Clinical Pearls
* Administer with food or milk to minimize gastric distress.
* Patient response can vary significantly, and the drug's efficacy is debated.
* Consider alternative therapies with more robust evidence for efficacy.
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**Disclaimer:** This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and local protocols for definitive guidance.
