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# Isoxsuprine hydrochloride
## Overview
Isoxsuprine hydrochloride is a peripheral vasodilator. Its mechanism of action is not fully understood but is thought to involve direct relaxation of vascular smooth muscle. It also has some beta-adrenergic agonist activity.
## Primary Indications
* Treatment of peripheral vascular disease, such as intermittent claudication.
* Management of cerebrovascular insufficiency.
## Adult Dosing
* **Intermittent Claudication and Peripheral Vascular Disease:** 10 mg to 20 mg three to four times daily.
* **Cerebrovascular Insufficiency:** 10 mg to 20 mg three to four times daily.
* **Maximum Dose:** Doses higher than 20 mg per administration or 80 mg per day are generally not recommended.
## Pediatric Dosing
No established pediatric dosing. Use is generally not recommended in children.
## Dose Adjustments
No specific dose adjustments are recommended for hepatic or renal impairment. However, caution is advised due to potential accumulation.
## Contraindications
* Hypersensitivity to isoxsuprine hydrochloride.
* Not recommended for use in patients with congenital heart disease or those who have recently experienced a stroke or myocardial infarction.
## Adverse Effects
Common adverse effects include:
* Nausea, vomiting, stomach upset
* Dizziness, weakness, drowsiness
* Hypotension (especially with rapid IV administration, which is not a typical route)
* Flushing
* Rash
## Key Drug Interactions
* **Antihypertensives:** Isoxsuprine may potentiate the hypotensive effects of antihypertensive medications.
* **Other Vasodilators:** Concurrent use may lead to additive hypotensive effects.
## Monitoring
* Blood pressure: Monitor for hypotension, especially at the start of therapy or with dose increases.
* Symptoms of peripheral vascular disease: Assess for improvement in claudication or other symptoms.
## Clinical Pearls
* The efficacy of isoxsuprine in treating peripheral vascular disease is controversial and not well-supported by robust clinical trials.
* It is generally taken orally with meals to minimize gastrointestinal upset.
* Rapid intravenous administration can cause a significant drop in blood pressure and should be avoided.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and relevant literature for complete details and to verify dosing and safety before administering this medication.
