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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.
## Primary Indications
* Peripheral vascular disease (e.g., intermittent claudication)
* Cerebrovascular insufficiency
## Adult Dosing
* **Intermittent claudication and peripheral vascular disease:** 10 mg to 20 mg orally 3 to 4 times daily.
* **Cerebrovascular insufficiency:** 10 mg to 20 mg orally 3 to 4 times daily.
* **Maximum dose:** Not explicitly defined, but doses exceeding 20 mg per administration or 80 mg per day are generally not recommended due to lack of demonstrated additional benefit and potential for increased adverse effects.
## Pediatric Dosing
There is no established pediatric dosing for isoxsuprine hydrochloride.
## Dose Adjustments
No specific dose adjustments are recommended for renal or hepatic impairment. Use with caution in patients with significant cardiovascular disease.
## Contraindications
* Hypersensitivity to isoxsuprine hydrochloride.
* Use in patients with congenital heart disease or arrhythmias.
## Adverse Effects
Common adverse effects include:
* Flushing
* Nausea
* Vomiting
* Dizziness
* Hypotension
* Tachycardia
* Weakness
* Abdominal distress
* Rash
## Key Drug Interactions
* **Antihypertensives:** Isoxsuprine may potentiate the effects of antihypertensive medications, leading to hypotension.
* **Other vasodilators:** Additive hypotensive effects may occur.
## Monitoring
* Blood pressure and heart rate.
* Symptoms of peripheral vascular disease or cerebrovascular insufficiency.
## Clinical Pearls
* Effectiveness for the treatment of peripheral vascular disease and cerebrovascular insufficiency is controversial and not well-established by rigorous clinical trials.
* Benefits, if any, may take several weeks to become apparent.
* Administer with food if gastrointestinal upset occurs.
**Disclaimer:** This information is intended for healthcare professionals. Prescribers should consult the most current prescribing information and available literature to ensure optimal patient care. Dosing and indications may vary based on local protocols and patient-specific factors.
