pharmacology question about half life

Question

The t_1/2 of digoxin is 2 days. How long will it take to achieve a steady state level of the drug?



a.     12 hours

b.    4 days

c.     8 days

d.    2  months

Answer 1

In normal kidney function, it needs 3 to 5 half-lives for digoxin to reach steady state.

half life here is 2 days

The best answer from the choices would be 8 days ( 2 x 4 half-lives)