Страна: САЩ
Език: английски
Източник: NLM (National Library of Medicine)
Dofetilide (UNII: R4Z9X1N2ND) (Dofetilide - UNII:R4Z9X1N2ND)
Major Pharmaceuticals
ORAL
PRESCRIPTION DRUG
Dofetilide capsules are indicated for the maintenance of normal sinus rhythm (delay in time to recurrence of atrial fibrillation/atrial flutter [AF/AFl]) in patients with atrial fibrillation/atrial flutter of greater than one week duration who have been converted to normal sinus rhythm. Because dofetilide capsules can cause life threatening ventricular arrhythmias, it should be reserved for patients in whom atrial fibrillation/atrial flutter is highly symptomatic. In general, antiarrhythmic therapy for atrial fibrillation/atrial flutter aims to prolong the time in normal sinus rhythm. Recurrence is expected in some patients (see CLINICAL STUDIES ). Dofetilide capsules are indicated for the conversion of atrial fibrillation and atrial flutter to normal sinus rhythm. Dofetilide capsules have not been shown to be effective in patients with paroxysmal atrial fibrillation. Dofetilide capsules are contraindicated in patients with congenital or acquired long QT syndromes. Dofetilide capsules should not be used in pa
Dofetilide capsules, 125 mcg (0.125 mg) are supplied as No. 4 capsules with a dark caramel cap and white body, imprinted with ML 125 in black ink, and are available in: Cartons of 40 capsules (10 capsules each blister pack x 4), NDC 0904-6681-08 Dofetilide capsules, 250 mcg (0.25 mg) are supplied as No. 4 capsules with a light orange cap and light orange body, imprinted with ML 250 in black ink, and are available in: Cartons of 40 capsules (10 capsules each blister pack x 4), NDC 0904-6682-08 Dofetilide capsules, 500 mcg (0.5 mg) are supplied as No. 2 capsules with a light orange cap and white body, imprinted with ML 500 in black ink, and are available in: Cartons of 40 capsules (10 capsules each blister pack x 4), NDC 0904-6683-08 Body 125 250 500 Cap ML ML ML Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.] PROTECT FROM MOISTURE AND HUMIDITY. Dispense in a tight, light-resistant container as defined in the USP using a child-resistant closure.
Abbreviated New Drug Application
DOFETILIDE- DOFETILIDE CAPSULE Major Pharmaceuticals ---------- MEDICATION GUIDE Dofetilide Capsules (doe-FEH-till-ide) Read the Medication Guide before you start taking dofetilide capsules and each time you get a refill. This information does not take the place of talking with your doctor about your condition or treatment. What is the most important information I should know about Dofetilide Capsules? Dofetilide capsules can cause serious side effects, including a type of abnormal heartbeat called Torsade de Pointes, which can lead to death. To establish the right dose of dofetilide capsules, treatment with dofetilide capsules must be started in a hospital where your heart rate and kidney function will be checked for the first 3 days of treatment. It is important that when you go home, you take the exact dose of dofetilide capsules that your doctor prescribed for you. While you take dofetilide capsules, always watch for signs of abnormal heartbeat. Call your doctor and go to the hospital right away if you: • feel faint • become dizzy, or • have a fast heartbeat What are Dofetilide Capsules? Dofetilide capsules is a prescription medicine that is used to treat an irregular heartbeat (atrial fibrillation or atrial flutter). It is not known if dofetilide capsules are safe and effective in children under 18 years of age. Who should not take Dofetilide Capsules? Do not take dofetilide capsules if you: • have an irregular heartbeat called long QT syndrome • have kidney problems or are on kidney dialysis • take any of these medicines: • cimetidine (TAGAMET, TAGAMET HB)1 • verapamil (CALAN, CALAN SR, COVERA-HS, ISOPTIN, ISOPTIN SR, VERELAN, VERELAN PM, TARKA)1 • ketoconazole (NIZORAL, XOLEGEL, EXTINA)1 • trimethoprim alone (PROLOPRIM, TRIMPEX)1 or the combination of trimethoprim and sulfamethoxazole (BACTRIM, SEPTRA SULFATRIM)1 • prochlorperazine (COMPAZINE, COMPO)1 • megestrol (MEGACE)1 • dolutegravir (TIVICAY)1 • hydrochlorothiazide alone or in combination with other medicines (such as ESIDR Прочетете целия документ
DOFETILIDE- DOFETILIDE CAPSULE MAJOR PHARMACEUTICALS ---------- DOFETILIDE CAPSULES To minimize the risk of induced arrhythmia, patients initiated or re-initiated on dofetilide capsules should be placed for a minimum of 3 days in a facility that can provide calculations of creatinine clearance, continuous electrocardiographic monitoring, and cardiac resuscitation. For detailed instructions regarding dose selection, see DOSAGE AND ADMINISTRATION. DESCRIPTION Dofetilide capsules are an antiarrhythmic drug with Class III (cardiac action potential duration prolonging) properties. Its empirical formula is C H N O S and it has a molecular weight of 441.6. The structural formula is The chemical name for dofetilide is: _N_-[4-[2-[methyl[2-[4-[(methylsulfonyl)amino]phenoxy]ethyl]amino]ethyl]phenyl]methanesulfonamide. Dofetilide is a white to off-white powder. It is very slightly soluble in water and propan-2-ol and is soluble in 0.1M aqueous sodium hydroxide, acetone, and aqueous 0.1M hydrochloric acid. Dofetilide capsules contain the following inactive ingredients: microcrystalline cellulose, corn starch, colloidal silicon dioxide and magnesium stearate. The capsule shells contain gelatin, titanium dioxide, red iron oxide, yellow iron oxide, and black ink. The imprint ink contains iron oxide black, shellac, ethanol, n-butyl alcohol, isopropyl alcohol, propylene glycol, and ammonium hydroxide. Dofetilide capsules are supplied for oral administration in three dosage strengths: 125 mcg (0.125 mg) dark caramel and white capsules, 250 mcg (0.25 mg) light orange capsules, and 500 mcg (0.5 mg) light orange and white capsules. CLINICAL PHARMACOLOGY MECHANISM OF ACTION Dofetilide shows Vaughan Williams Class III antiarrhythmic activity. The mechanism of action is blockade of the cardiac ion channel carrying the rapid component of the delayed rectifier potassium current, I . At concentrations covering several orders of magnitude, dofetilide blocks only I with no relevant block of the other repolarizing potassium currents (e.g., I Прочетете целия документ