<prompt> H a t year old patient on Oxygen therapy has developed digital toxicity. The plasma peacocks in level is 4ngml. Renal function is normal and the plasma half life for digoxin in this patient is 1.6 days. How long should give with hold digoxin in order to reach a safer yet probably therapeutic level of 1ngml1.6days2.4days3.2days4.8days  <response>: Ref-Katzung 10e p48 WeWwant to decrease a plama concentration of digoxin from 1ngml.it will take two half lives.thus time required is 2x1.63.2days 