A member asked:

How long before an increase in synthroid (thyroxine) from 5 tabs of 25 mcg to 8 tabs each week takes full effect for hypothyroidism treatment?

2 doctors weighed in across 2 answers
Dr. Douglas Fronzaglia ii, do, ms answered

Specializes in Internal Medicine - Geriatrics

Few weeks: It will take a few weeks to have a the full effect of a dose change of your synthroid (thyroxine).

Answered 12/20/2012


Dr. Brian Chou answered

Specializes in

6 weeks: Synthroid or levothyroxine does not have to be titrated like that as the half-life is 1 week and thus steady state typically takes 4-6 weeks to obtain. Generally, the most appropriate dose should be started and adjusted every 6-8 weeks according to bloodwork. A good estimate is 1.6 mcg/kg as a start.

Answered 11/11/2018



Related Questions

Online Primary Care Doctors Accepting New Patients

$44 video appointments available today with a membership as low as $15/month

Book a Video Appointment
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question