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# Isoxsuprine Hydrochloride
## Overview
Isoxsuprine hydrochloride is a vasodilator and smooth muscle relaxant. Its exact mechanism of action is not fully understood, but it is believed to cause relaxation of vascular smooth muscle, leading to vasodilation.
## Primary Indications
* Intermittent claudication secondary to peripheral vascular disease.
* Vasospasm associated with peripheral vascular disease.
## Adult Dosing
* **Intermittent Claudication/Peripheral Vascular Disease:** 10 mg to 20 mg orally three to four times daily.
* **Maximum Dose:** Not explicitly defined, but doses above 20 mg four times daily are generally not recommended.
## 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 should be exercised in patients with severe disease.
## Contraindications
* Hypersensitivity to isoxsuprine hydrochloride.
* In patients who have experienced a recent arterial embolus.
* In patients with severe cardiac disease.
## Adverse Effects
* **Common:** Nausea, vomiting, gastrointestinal distress, dizziness, weakness, flushing, rash.
* **Less Common:** Hypotension, tachycardia, drowsiness, nervousness, abdominal distress, constipation.
## Key Drug Interactions
* **Antihypertensives:** Isoxsuprine may potentiate the effects of antihypertensive medications, leading to additive hypotension. Monitor blood pressure closely.
* **Other Vasodilators:** Concurrent use with other vasodilators may increase the risk of hypotension.
## Monitoring
* Monitor for signs and symptoms of peripheral vascular disease improvement.
* Monitor for adverse effects, particularly hypotension, dizziness, and gastrointestinal upset.
* Monitor blood pressure.
## Clinical Pearls
* Isoxsuprine is generally not considered a first-line agent for peripheral vascular disease due to limited evidence of efficacy and potential for side effects.
* Optimal therapeutic effect may not be observed for several weeks.
* Discontinue if gastric irritation or other adverse effects occur.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and product monographs for complete details before making any treatment decisions. Local protocols and institutional guidelines should also be considered.
