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# Isoxsuprine hydrochloride ## Overview Isoxsuprine hydrochloride is a vasodilator. Its mechanism of action is thought to involve direct relaxation of vascular smooth muscle. ## Primary Indications * Treatment of peripheral vascular diseases such as intermittent claudication and vasospastic disorders. * (Historically) Used to improve cerebral and peripheral blood flow. ## Adult Dosing * **Oral:** The typical starting dose is 10-20 mg three to four times daily. Doses may be increased to 40 mg four times daily. * **Maximum Dose:** Not explicitly defined, but doses exceeding 40 mg four times daily are generally not recommended due to lack of additional benefit and increased risk of adverse effects. ## Pediatric Dosing There is no established pediatric dosing for isoxsuprine hydrochloride. ## Dose Adjustments No specific dose adjustments are routinely recommended for hepatic or renal impairment. However, caution may be warranted in patients with severe disease. ## Contraindications * Hypersensitivity to isoxsuprine hydrochloride. * Should not be administered immediately postpartum or in the presence of a bleeding disorder due to potential hypotensive effects. ## Adverse Effects Common adverse effects include: * Nausea, vomiting, stomach upset * Dizziness, lightheadedness, weakness * Flushing * Hypotension * Tachycardia, palpitations * Rash ## Key Drug Interactions * **Antihypertensives:** May potentiate hypotensive effects. * **Other Vasodilators:** Additive vasodilatory effects may lead to exaggerated hypotension. ## Monitoring * Blood pressure and heart rate. * Signs and symptoms of peripheral vascular disease improvement. * Monitor for adverse effects. ## Clinical Pearls * Efficacy in treating peripheral vascular disease is debated and generally considered limited. * Administer with food to minimize gastrointestinal upset. * Avoid use in the presence of recent hemorrhage or severe hypotension. *** *This information is for educational purposes only and does not constitute medical advice. Always consult the most current prescribing information and a qualified healthcare professional for any medical decisions. Treatment decisions should be based on individual patient needs and clinical judgment.*