The digitoxin half-life in elderly patients in the eight and ninth dec
ade was more prolonged (mean +/- SD: 25 +/- 9 days) than in younger pe
ople (6.7 +/- 1.7). These elderly patients accumulated digitoxin even
on a dose of 0.05 mg/day. The symptoms of digitoxin intoxication disap
peared on discontinuation of medication. When digitoxin is used in the
treatment for heart failure in the very elderly patients, one should
be aware of the possibility of digitoxin intoxication, even on a low d
ose.