Sodium Tetradecyl Sulfate

Sodium tetradecyl sulfate injection is indicated in the treatment of small uncomplicated varicose veins of the lower extremities that show simple dilation with competent valves. The benefit- to-risk ratio should be considered in selected patients who are great surgical risks.

Sodium tetradecyl sulfate injection is contraindicated in previous hypersensitivity reactions to the drug; in acute superficial thrombophlebitis; valvular or deep vein incompetence; huge superficial veins with wide open communications to deeper veins; phlebitis migrans; acute cellulitis; allergic conditions; acute infections; varicosities caused by abdominal and pelvic tumors unless the tumor has been removed; bedridden patients; such uncontrolled systemic diseases as diabetes, toxic hyperthyroidism, tuberculosis, asthma, neoplasm, sepsis, blood dyscrasias and acute respiratory or skin diseases.

Sodium tetradecyl sulfate injection should only be administered by a healthcare professional experienced in venous anatomy and the diagnosis and treatment of conditions affecting the venous system and familiar with proper injection technique. Severe adverse local effects, including tissue necrosis, may occur following extravasation; therefore, extreme care in intravenous needle placement and using the minimal effective volume at each injection site are important. Emergency resuscitation equipment should be immediately available. Allergic reactions, including fatal anaphylaxis, have been reported. As a precaution against anaphylactic shock, it is recommended that 0.5 mL of sodium tetradecyl sulfate injection be injected into a varicosity, followed by observation of the patient for several hours before administration of a second or larger dose. The possibility of an anaphylactic reaction should be kept in mind, and the physician should be prepared to treat it appropriately. Because of the danger of thrombosis extension into the deep venous system, thorough preinjection evaluation for valvular competency should be carried out and slow injections with a small amount (not over 2 mL) of the preparation should be injected into the varicosity. Deep venous patency must be determined by noninvasive testing such as duplex ultrasound. Venous sclerotherapy should not be undertaken if tests such as Trendelenberg and Perthes, and angiography show significant valvular or deep venous incompetence. The development of deep vein thrombosis and pulmonary embolism have been reported following sclerotherapy treatment of superficial varicosities. Patients should have post-treatment follow-up of sufficient duration to assess for the development of deep vein thrombosis. Embolism may occur as long as four weeks after injection of sodium tetradecyl sulfate. Adequate post-treatment compression may decrease the incidence of deep vein thrombosis. Arterial Embolism Stroke, transient ischemic attack, myocardial infarction, and impaired cardiac function have been reported in close temporal relationship with STS administration. These events may be caused by air embolism when using the product foamed with room air (high nitrogen concentration) or thromboembolism. The safety and efficacy of STS foamed with room air has not been established and its use should be avoided.

GENERAL Extreme caution must be exercised in the presence of underlying arterial disease such as marked peripheral arteriosclerosis or thromboangiitis obliterans (Buerger’s Disease).

Local reactions consisting of pain, urticaria or ulceration may occur at the site of injection. A permanent discoloration may remain along the path of the sclerosed vein segment. Sloughing and necrosis of tissue may occur following extravasation of the drug. (See WARNINGS section.) Allergic reactions such as hives, asthma, hay fever and anaphylactic shock have been reported. Mild systemic reactions that have been reported include headache, nausea and vomiting. (See WARNINGS section.) At least six deaths have been reported with the use of sodium tetradecyl sulfate injection. Four cases of anaphylactic shock leading to death have been reported in patients who received sodium tetradecyl sulfate injection. One of these four patients reported a history of asthma, a contraindication to the administration of sodium tetradecyl sulfate injection. (See WARNINGS section.) One death has been reported in a patient who received sodium tetradecyl sulfate injection and who had been receiving an antiovulatory agent. Another death (fatal pulmonary embolism) has been reported in a 36-year-old female treated with sodium tetradecyl acetate and who was not taking oral contraceptives. Cerebrovascular accident, myocardial infarction To report SUSPECTED ADVERSE REACTIONS, contact Hikma Pharmaceuticals USA Inc. at 1-877-845-0689 or FDA at 1-800 FDA-1088 or www.fda.gov/medwatch.

No well-controlled studies have been performed on patients taking antiovulatory agents. The physician must use judgment and evaluate any patient taking antiovulatory drugs prior to initiating treatment with sodium tetradecyl sulfate injection. (See ADVERSE REACTIONS section.) Heparin should not be included in the same syringe as sodium tetradecyl sulfate injection, since the two are incompatible.

Teratogenic Effects Animal reproduction studies have not been conducted with sodium tetradecyl sulfate injection. It is also not known whether sodium tetradecyl sulfate injection can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. sodium tetradecyl sulfate injection should be given to a pregnant woman only if clearly needed and the benefits outweigh the risks.

It is not known whether this drug is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when sodium tetradecyl sulfate injection is administered to a nursing woman.

Safety and effectiveness in pediatric patients have not been established.