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# Isoxsuprine Hydrochloride
## Overview
Isoxsuprine hydrochloride is a vasodilator. Its exact mechanism of action is not fully understood but is thought to involve direct relaxation of vascular smooth muscle, leading to vasodilation.
## Primary Indications
* Treatment of peripheral vascular disease (e.g., intermittent claudication).
* Treatment of cerebrovascular insufficiency.
* *Note: Efficacy in these indications is not well-established and it is not approved by the FDA for these uses. It is often used off-label.*
## Adult Dosing
* **Oral:** 10 mg to 20 mg three to four times daily.
* **Maximum Dose:** Doses higher than 20 mg per administration are not usually recommended.
## Pediatric Dosing
* There is no established pediatric dosing for isoxsuprine hydrochloride. Safety and efficacy have not been determined in this population.
## Dose Adjustments
* **Renal Impairment:** No specific guidelines are available. Use with caution and consider dose reduction.
* **Hepatic Impairment:** No specific guidelines are available. Use with caution and consider dose reduction.
## Contraindications
* Hypersensitivity to isoxsuprine hydrochloride.
* Do not administer in the immediate post-convalescent phase of **arteriosclerosis** or **coronary artery disease**.
* Do not administer in the presence of infection or congestive heart failure.
## Adverse Effects
* **Common:** Nausea, vomiting, gastrointestinal distress, dizziness, weakness, flushing, rash.
* **Cardiovascular:** Hypotension, tachycardia, palpitations, EKG changes.
* **Other:** Blurred vision.
## Key Drug Interactions
* **Antihypertensives:** Isoxsuprine may potentiate the hypotensive effects of antihypertensive medications.
* **Other Vasodilators:** Concomitant use with other vasodilators may increase the risk of hypotension.
## Monitoring
* Blood pressure and heart rate.
* Signs and symptoms of peripheral vascular disease.
* Adverse effects.
## Clinical Pearls
* Due to limited evidence of efficacy and potential adverse effects, use should be carefully considered and balanced against benefits.
* Patients should be advised to report any adverse effects, especially dizziness or changes in heart rate.
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**Disclaimer:** This information is intended for clinical use by healthcare professionals. It is not exhaustive and does not replace independent clinical judgment or current prescribing information. Always verify current prescribing information with the manufacturer's product literature and relevant clinical guidelines before making any treatment decisions.
