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# Isoxsuprine hydrochloride ## Overview Isoxsuprine hydrochloride is a vasodilator that primarily acts on smooth muscle, causing relaxation. Its use is limited due to a lack of proven efficacy for many of its former indications. ## Primary Indications * **Peripheral vascular disease:** Historically used to improve blood flow in conditions like intermittent claudication. However, its efficacy is not well-established by current evidence. ## Adult Dosing * **Peripheral vascular disease:** 10 mg to 20 mg orally three to four times daily. The maximum recommended daily dose is typically 80 mg. ## Pediatric Dosing * There is no established pediatric dosing for isoxsuprine hydrochloride. ## Dose Adjustments * **Renal Impairment:** No specific dose adjustments are established. Use with caution. * **Hepatic Impairment:** No specific dose adjustments are established. Use with caution. ## Contraindications * Hypersensitivity to isoxsuprine hydrochloride. * Do not administer intravenously. ## Adverse Effects * **Cardiovascular:** Hypotension, reflex tachycardia, flushing, dizziness, weakness. * **Gastrointestinal:** Nausea, vomiting, abdominal distress. * **Other:** Rash, gastric irritation. ## Key Drug Interactions * **Antihypertensives:** Isoxsuprine may potentiate the hypotensive effects of antihypertensive medications. * **Other Vasodilators:** Concurrent use with other vasodilators may lead to additive hypotensive effects. ## Monitoring * Blood pressure and heart rate. * Signs and symptoms of peripheral vascular disease. ## Clinical Pearls * The clinical benefit of isoxsuprine for peripheral vascular disease is not well-supported by high-quality evidence. Consider alternative therapies with proven efficacy. * Administer orally. Avoid intravenous administration. * Patients with cardiovascular conditions may be at higher risk for adverse effects. *** *This information is intended for clinical decision-making and does not replace comprehensive drug references. Always consult current prescribing information and institutional protocols for definitive guidance.*