Between 0.125 mg and 0.25 mg. Between 0.125mg and 0.25mg Digoxin is considered safe to use in the elderly as long as the dose is no greater than 0.125 milligram (mg) or 125 mcg per day.
Digoxin is considered safe to use in the elderly as long as the dose is no greater than 0.125 milligram (mg) or 125 mcg per day. As we age, our kidney function changes and normally slows, so our bodies can't get rid of certain substances, like digoxin, as quickly as they once could have. Tablets are available in doses of 0.125 milligram (mg) and 0.250 mg. Sometimes, the doses may be written in micrograms (mcg): 120 mcg and 250 mcg. Your doctor will draw blood to determine how much digoxin you should be taking each day. 1 At first, the dose is usually 20 to 35 micrograms (mcg) per kilogram (kg) of body weight. 2  Your doctor may adjust your dose as needed. 3  However, the maintenance dose is usually 5.6 to 11.3 mcg per kg of body weight per day. 1 For heart failure or atrial fibrillation: 2  For oral dosage form (solution): 3  Adults, teenagers, and children 10 years of age and older—Dose is based on age, body weight, and medical condition and must be determined by your doctor. 4  At first, the dose is usually 10 to 1 1 At first, the dose is usually 30 to 45 micrograms (mcg) per kilogram (kg) of body weight. 2  Your doctor may adjust your dose as needed. 3  However, the maintenance dose is usually 9.4 to 13.1 mcg per kg of body weight per day. 1 For heart failure or atrial fibrillation: 2  For oral dosage form (solution): 3  Adults, teenagers, and children 10 years of age and older—Dose is based on age, body weight, and medical condition and must be determined by your doctor. 4  At first, the dose is usually 10 to 1 Additional doses of 125 to 375 mcg (0.125 to 0.375 mg) may be given cautiously at 6- to 8- hour intervals until clinical evidence of an adequate effect is noted. The usual amount of digoxin tablets that a 70-kg patient requires to achieve 8 to 12 mcg/kg peak body stores is 750 to 1,250 mcg (0.75 to 1.25 mg). Therapy is generally initiated at a dose of 250 mcg (0.25 mg) once daily in patients under age 70 with good renal function, at a dose of 125 mcg (0.125 mg) once daily in patients over age 70 or with impaired renal function, and at a dose of 62.5 mcg (0.0625 mg) in patients with marked renal impairment. General adult dose of digoxin is 0.75-1.5 mg for digitalization and 0.125-0.5 mg daily for maintenance. Approximately 25% is bound with plasma proteins; only small amounts are metabolized in liver or lumen of large intestine.  Most people will likely be maintained on a dosage between 0.125 mg and 0.25 mg to achieve this level. Digoxin toxicity is likely to occur if levels exceed 2 ng per mL. It normally takes one to three weeks after you start digoxin treatment for an adequate amount of the drug to accumulate in your body. Your healthcare provider will calculate a starting dosage of digoxin. For adults and children age 10 and up, the typical amounts will range from 62.5 to 500 mcg daily, depending on weight and your kidney function. 1 At first, the dose is usually 10 to 15 micrograms (mcg) per kilogram (kg) of body weight. 2  Your doctor may adjust your dose as needed. 3  However, the maintenance dose is usually 3 to 4.5 mcg per kg of body weight per day. 1 For heart failure or atrial fibrillation: 2  For oral dosage form (solution): 3  Adults, teenagers, and children 10 years of age and older—Dose is based on age, body weight, and medical condition and must be determined by your doctor. 4  1 However, the maintenance dose is usually 3 to 4.5 mcg per kg of body weight per day. 2  Children 5 to 10 years of age—Dose is based on age, body weight, and medical condition and must be determined by your doctor. 3  At first, the dose is usually 20 to 35 micrograms (mcg) per kilogram (kg) of body weight. 1 For heart failure or atrial fibrillation: 2  For oral dosage form (solution): 3  Adults, teenagers, and children 10 years of age and older—Dose is based on age, body weight, and medical condition and must be determined by your doctor. 4  At first, the dose is usually 10 to 1 Recommended doses approximately 30 percent lower than the calculated dose are designated with an *. Monitor digoxin levels in patients receiving these initial doses and increase dose if needed. . bFor adults, creatinine clearance was corrected to 70-kg body weight or 1.73 m² body surface area. If only serum creatinine concentrations (Scr) are available, a corrected Ccr may be estimated in men as (140 – Age)/Scr. 
http://www.everydayhealth.com/drugs/digoxin http://www.mayoclinic.org/drugs-supplements/digoxin-oral-route/proper-use/DRG-20072646 http://www.mayoclinic.org/drugs-supplements/digoxin-oral-route/proper-use/DRG-20072646 http://www.rxlist.com/digitek-drug/indications-dosage.htm http://emedicine.medscape.com/article/2089975-overview http://congestive-heart-failure.emedtv.com/digoxin/digoxin-dosage.html http://www.mayoclinic.org/drugs-supplements/digoxin-oral-route/proper-use/DRG-20072646 http://www.mayoclinic.org/drugs-supplements/digoxin-oral-route/proper-use/DRG-20072646 http://www.rxlist.com/lanoxin-tablets-drug/indications-dosage.htm
what is the normal dosage for digoxin