Get Virtual Care
For Businesses
About Us
A member asked:
What is the thyroxine(t4) half life if we give 500mcg single dose?
A doctor has provided 1 answer
Half life: If euthyroid (normal thyroid levels) the half life is 6-7 hrs. (in hyperthyroidism 3–4 days, in hypothyroidism 9–10 days.
Answered 5/6/2020
884 views
Thank
Related Questions
A member asked:
Had chemical pregnancy of 4 wks & TSH levels nw are 0.25 & free T4 1.8.My doc dnt want 2 reduce Synthroid (thyroxine) dose (75mcg) n want 2 check in 4 wks.Normal?
A doctor has provided 1 answer
A member asked:
On 25mcg synthroid, (thyroxine)TSH reduced frm 4.67 to 4.57; Free T4 1.2; T3 103.Doc increased dose to 50mcg.I am trying to conceive.Is it ok?
A doctor has provided 1 answer
A member asked:
Can someone interpret my thyroid levels: T3 (liothyronine) 1.06 ng/ml, T4 10.20 ?g/dl, TSH 2.05 ?iu/ml. I take 75 mg l-thyroxine everyday. Am i given the right dose?
A doctor has provided 1 answer
A member asked:
TSH 1.160 (0.091 in 9/2022) T4 9.7, T3 uptake 21, Free T3 3.6, Free Thyroxine Index 2.0, NP wants to start on low dose Levothyroxine due to low T3 uptake, even though others levels WNL. Should I start taking it or not? 31, female, fatigue, wt gain?
2 doctors weighed in across 2 answers
A member asked:
Finally on dose of synthroid to keep TSH down (currently around 4tsh) and free T4 normal. Antibodies tpo came back at 1. What are other likely causes?
A doctor has provided 1 answer
People also searched for:
My TSH is 9.75, T3 (liothyronine) is 2.10 and T4 is 0.73. I am taking 50 mg Thyroxine everyday. Is this enough or should i increase my dose?
Wt 86 kg age 46 yrs T4 7.7 TSH 12.86 I am on thyroxine sodium taking 2 tab of 50 mcg now my dr asked me to inc d dose now i m on 3 mcg daily is it ok?
Im 30y.From14.02.22 I take L-thyroxine 100mg daily bcse of TSH 3.14 ,T3 = 2.9 and T4=1.07 and plans for pregnncy.On12.04,i had TSH ~ 0.01, T3= +8.5 ,T4= +3.14. I have apointment with the doctor on 28.04.Which dose of L-thyrox should i take until 28?
Does normal (1.01) "thyroxine (t4) free, direct, s, " normal (0.931) "tsh, " and low (67) "triiodothyronine (t3)" = Synthroid dose good? Or go up/down?
My T4 free was 1.0. TSH w/reflex to FT4 was 7.97. I have been on various doses of Synthroid (thyroxine) for years. Now is 112mg. Should it be higher dose?
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 questionMore of what we treat
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HIPAASecure
SOC 2 Type 2Certified
JCAHOAccredited
Download HealthTap
Video visit and message your doctor
