A patient has been taking levothyroxine once daily for 1 year for the treatment of hypothyroidism. At her last office visit a dose adjustment is made. The half - life of levothyroxine is about 7 days. Approximately how long will it take for the new steady state level to be reached?
A) 2 weeks
B) 4 days
C) 5 weeks
D) 1 week