(1) Atrial fibrillation-an irregularity of the heart-beat. Digoxin is
especially effective in slowing and strengthening the heart in this condition.
(2) Heart failure: Digoxin is one of the drugs for which correct dosage
is very important: the right dose for one person may be an overdose for
someone else. Side-effects may develop after some weeks or months of
treatment as the drug accumulates: these include loss of appetite, feelings of
sickness, and constipation. If overdosage is suspected your doctor will
advise you to stop taking the drug altogether for some days.