Isoxsuprine Hcl
General Drug Information and Indications
Vasodilator used historically in horses for navicular disease (caudal heel syndrome); promotes digital vasodilatation.
Vasodilator with beta-adrenergic agonist properties (isoxsuprine HCl). Mechanism: beta-2 adrenergic receptor activation → vascular smooth muscle relaxation → peripheral and digital vasodilation; also inhibits platelet aggregation. Primarily used in horses for navicular disease to increase digital blood flow. Oral or IM administration.
Key information
Vasodilator — used for navicular disease in horses. Oral only. Administer on empty stomach for best absorption. Long-term therapy often required. Store at room temperature.
How to Give this Medication
Oral tablets (horses): administer orally mixed into grain or via dose syringe. Administer with food to reduce GI adverse effects. Administer twice daily at consistent times. Store at room temperature; protect from light.
If a dose is missed
Administer as soon as you remember. If it is almost time for the next scheduled dose, skip the missed dose and resume the normal schedule. Never double up doses to make up for a missed one. Administer on empty stomach for best absorption.
Side Effects
Cardiovascular: tachycardia, palpitations, hypotension. GI: nausea, vomiting. CNS: dizziness, restlessness. Sweating. Tremors. Horses: generally well tolerated at labeled doses; tachycardia most common adverse effect.
Precautions
For animals
Use with caution in patients with tachycardia or cardiovascular disease. Not approved for use in food-producing animals. Evidence for efficacy in navicular disease is limited.
For people handling this medication
Wash hands thoroughly with soap and water after handling. Avoid contact with eyes; if contact occurs, flush with water for 15 minutes and seek medical attention. Keep out of reach of children. If accidental ingestion occurs, contact Poison Control (1-800-222-1222). Vasodilator — Wash hands thoroughly with soap and water after handling. after handling tablets. Keep out of reach of children. May cause flushing if ingested.
Overdose
Contact your veterinarian. Isoxsuprine overdose causes low blood pressure, rapid heart rate, and GI signs.
Isoxsuprine Hcl dosage forms
| Product | Strength | Form | Size | Type |
|---|---|---|---|---|
| ISOXSUPRINE HCL 50 MG/ML SUSPENSION | 50 MG/ML | Suspension | 1 | Compound |
| ISOXSUPRINE HCL POWDER 200 MG/SCOOP | 200 MG/SCOOP | Powder | 1 | Compound |
| ISOXSUPRINE HCL POWDER 250 MG/SCOOP | 250 MG/SCOOP | Powder | 1 | Compound |
| ISOXSUPRINE HCL POWDER 300 MG/SCOOP | 300 MG/SCOOP | Powder | 1 | Compound |
| ISOXSUPRINE HCL POWDER 350 MG/SCOOP | 350 MG/SCOOP | Powder | 1 | Compound |
| ISOXSUPRINE HCL POWDER 400 MG/SCOOP | 400 MG/SCOOP | Powder | 1 | Compound |
| ISOXSUPRINE HCL POWDER 500 MG/SCOOP | 500 MG/SCOOP | Powder | 1 | Compound |
| ISOXSUPRINE HCL POWDER 600 MG/SCOOP | 600 MG/SCOOP | Powder | 1 | Compound |
| ISOXSUPRINE HCL POWDER 640 MG/SCOOP | 640 MG/SCOOP | Powder | 1 | Compound |
| ISOXSUPRINE HCL POWDER 700 MG/SCOOP | 700 MG/SCOOP | Powder | 1 | Compound |
Sources
This information is provided for educational purposes and is not a substitute for advice from your veterinarian. Source: Merck Veterinary Manual (merckvetmanual.com); Plumb's Veterinary Drug Handbook (Plumb, D.C., app.plumbs.com)