Lanoxin is used for:
Treating heart failure and slowing the heart rate in patients with chronic atrial fibrillation, a type of abnormal heart rhythm. It may also be used for certain conditions as determined by your doctor.

Lanoxin is a digitalis glycoside. It works by increasing the force of contraction of the heart and slowing heart rate.

Do NOT use Lanoxin if:
you are allergic to any ingredient in Lanoxin or other digitalis medicines
you have Beriberi heart disease
you have certain types of heart rhythm problems, such as ventricular fibrillation

Contact your doctor or health care provider right away if any of these apply to you.

Before using Lanoxin :
Some medical conditions may interact with Lanoxin . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
if you are pregnant, planning to become pregnant, or are breast-feeding
if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
if you have allergies to medicines, foods, or other substances
if you have severe heart failure, inflammation of the heart, coronary artery disease, heart attack, heart block, extra heart beats (PVCs), certain abnormal heart rhythms, or fainting due to a heart problem
if you have severe kidney, liver or lung problems, or a thyroid problem
if you have low blood levels of calcium, magnesium, or potassium, or high blood levels of potassium or calcium

Some MEDICINES MAY INTERACT with Lanoxin . Tell your health care provider if you are taking any other medicines, especially any of the following:
Amiodarone, amphotericin B, anticholinergics (eg, propantheline), beta-blockers (eg, propranolol), bupivacaine, calcium, certain stimulants (eg, albuterol, amphetamine, pseudoephedrine), cyclosporine, diphenoxylate, diltiazem, diuretics (eg, hydrochlorothiazide, furosemide), indomethacin, itraconazole, macrolides (eg, erythromycin), propafenone, quinidine, quinine, spironolactone, succinylcholine, tetracyclines (eg, doxycycline), thioamines (eg, methimazole), or verapamil because side effects of Lanoxin , especially on the heart, may be increased
Acarbose, certain anticancer medicines, cholestyramine, colestipol, kaolin-pectin, metoclopramide, penicillamine, rifampin, sulfasalazine, or thyroid hormones (eg, levothyroxine) because the effectiveness of Lanoxin may be decreased
Oral aminoglycosides (eg, neomycin) because the actions and side effects of Lanoxin may be increased or decreased
Spironolactone because it may interfere with certain lab tests for digoxin blood levels and give false readings

This may not be a complete list of all interactions that may occur. Ask your health care provider if Lanoxin may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Lanoxin :
Use Lanoxin as directed by your doctor. Check the label on the medicine for exact dosing instructions.
Lanoxin is usually given as an injection at your doctor's office, hospital, or clinic. If you will be using Lanoxin at home, a health care provider will teach you how to use it. Be sure you understand how to use Lanoxin . Follow the procedures you are taught when you use a dose. Contact your health care provider if you have any questions.
Do not use Lanoxin if it contains particles, is cloudy or discolored, or if the vial is cracked or damaged.
Keep this product, as well as syringes and needles, out of the reach of children and pets. Do not reuse needles, syringes, or other materials. Ask your health care provider how to dispose of these materials after use. Follow all local rules for disposal.
If you miss a dose of Lanoxin , take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Lanoxin .

Important safety information:
Tell your doctor or dentist that you take Lanoxin before you receive any medical or dental care, emergency care, or surgery.
LAB TESTS, including electrocardiogram (ECG), electrolytes, and blood digoxin levels, may be performed while you use Lanoxin . These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
Use Lanoxin with caution in the ELDERLY; they may be more sensitive to its effects.
PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Lanoxin while you are pregnant. Lanoxin is found in breast milk. If you are or will be breast-feeding while you use Lanoxin , check with your doctor. Discuss any possible risks to your baby.

Possible side effects of Lanoxin :
All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Diarrhea; fast, slow, or irregular heartbeat; loss of appetite; nausea; vomiting; weakness.
Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); heart disturbances.