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# Isoxsuprine Hydrochloride
## Overview
Isoxsuprine hydrochloride is a peripheral vasodilator that acts primarily by relaxing vascular smooth muscle, leading to vasodilation. It also has some beta-adrenergic agonist activity.
## Primary Indications
* Adjunctive therapy for the treatment of intermittent claudication in patients with peripheral arterial disease.
* Management of cerebrovascular insufficiency.
## Adult Dosing
* **Intermittent Claudication/Cerebrovascular Insufficiency:**
* **Oral:** 10 mg to 20 mg three to four times daily.
* **Maximum:** No specific maximum dose is established, but doses exceeding 20 mg per administration are not generally recommended.
## Pediatric Dosing
* No established pediatric dosing. Use is generally not recommended in pediatric patients.
## Dose Adjustments
* No specific dose adjustments are routinely recommended for renal or hepatic impairment. However, caution is advised in patients with severe impairment.
## Contraindications
* Hypersensitivity to isoxsuprine.
* Use immediately postpartum.
* Use in patients with congenital heart defects or arrhythmias.
## Adverse Effects
* **Common:** Flushing, hypotension, dizziness, nausea, vomiting, abdominal distress, rash, weakness, and tachycardia.
* **Less Common:** Palpitations, blurred vision, and drowsiness.
## Key Drug Interactions
* **Antihypertensives:** Isoxsuprine may potentiate the effects of antihypertensive medications, increasing the risk of hypotension.
* **Sympathomimetics:** Concurrent use may lead to additive cardiovascular effects.
## Monitoring
* Blood pressure and heart rate.
* Symptoms of peripheral vascular disease (e.g., pain, claudication distance).
* Signs of adverse effects.
## Clinical Pearls
* Isoxsuprine's efficacy in peripheral arterial disease is controversial, and it is not considered a first-line treatment.
* Onset of action may take several weeks.
* Avoid use in patients with recent myocardial infarction or those requiring rapid heart rate.
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**Disclaimer:** This information is intended for clinical use by healthcare professionals and does not replace a thorough review of the complete prescribing information. Always consult the most current official drug monograph or package insert for comprehensive details and to verify information.
