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LANOXIN (digoxin) is a cardiac glycoside, a closely related group of drugs having in common specific effects on the myocardium. These drugs are found in a number of plants. Digoxin is extracted from the leaves of Digitalis lanata. The term “digitalis” is used to designate the whole group of glycosides. The glycosides are composed of 2 portions: a sugar and a cardenolide (hence “glycosides”).
Digoxin is described chemically as (3β,5β,12β)-3-[(O-2,6-dideoxy-β-D-ribo-hexopyranosyl(1→4)-O-2,6-dideoxy-β-D-ribo-hexopyranosyl-(1→4)-2,6-dideoxy-β-D-ribohexopyranosyl)oxy]-12,14-dihydroxy-card-20(22)-enolide. Its molecular formula is C41H64O14, its molecular weight is 780.95, and its structural formula is:
Digoxin exists as odorless white crystals that melt with decomposition above 230°C. The drug is practically insoluble in water and in ether; slightly soluble in diluted (50%) alcohol and in chloroform; and freely soluble in pyridine.
LANOXIN is supplied as 125 mcg (0.125-mg) or 250 mcg (0.25-mg) tablets for oral administration. Each tablet contains the labeled amount of digoxin USP and the following inactive ingredients: corn and potato starches, lactose, and magnesium stearate. In addition, the dyes used in the 125 mcg (0.125 mg) tablets are D&C Yellow No. 10 and FD&C Yellow No. 6.
What are the possible side effects of digoxin (Digitek, Lanoxicaps, Lanoxin)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
- fast, slow, or uneven heart rate;
- bloody or black, tarry stools;
- blurred vision, yellowed vision; or
- confusion, hallucinations, unusual thoughts or behavior.
Less serious side effects may include:
- nausea, vomiting, diarrhea, loss of appetite;
- feeling weak or...
What are the precautions when taking digoxin tablets (Lanoxin)?
Before taking digoxin, tell your doctor or pharmacist if you are allergic to it; or to similar drugs (such as digitoxin); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney problems, thyroid problems (underactive or overactive).
This drug may make you dizzy or cause blurred vision. Do not drive, use machinery, or do any activity that requires alertness or clear vision until you are sure you can perform such activities safely.
The balance of certain natural minerals in your blood (calcium, magnesium, potassium) can affect how this drug...
Last reviewed on RxList: 10/17/2016
This monograph has been modified to include the generic and brand name in many instances.
Additional Lanoxin Information
Lanoxin Injection - User Reviews
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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