Sotradecol (Sodium Tetradecyl Sulfate) 1% for Injection 2 mL Multiple Dose Vials 2 mL x 5/Box (Rx)Sotradecol (Sodium Tetradecyl Sulfate) 1% Injection is a prescription medication used to treat small varicose veins and spider veins. It is a sclerosing agent, meaning it causes damage to the blood vessel walls, causing them to stick together and eventually scar over. This helps to reduce the appearance of varicose veins and improve blood flow in affected areas. It is only used under the supervision and guidance of a healthcare professional.