U.S. doctors online nowAsk doctors free
Methuen, MA
A 29-year-old female asked:

Thyroid ultrasound = no concern ; thy. antibody test showed no autoimmune cause. tsh still high, even on synthroid. ft4 high end of normal. causes???

1 doctor answer • 4 doctors weighed in
Dr. Richard Zimon
Dr. Richard Zimonanswered
Internal Medicine 60 years experience
Two thoughts: 1. This sounds like primary thyroid failure ("simple" HYPO-thyroidism) which is "borderline" but is causing the high TSH (Think of the TSH "trying" to "waken" the "sleeping" gland. 2. Synthroid per se (=thyroxine (T-4) is a POOR TSH suppressant ...it needs to be converted to T-3 to suppress the TSH..thus a SWITCH in your thyroid pills to a T-3 may help! Hope this is helpful Dr Z
260 viewsReviewed >2 years ago
Thank
Dr. Sahba Ferdowsi
Dr. Al Hegab
Dr. Marvin Ott
Dr. Sahba Ferdowsi and 2 doctors agree3 doctors agree

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

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

Related questions

A 49-year-old female asked:
Thyroid ultrasound reveals slight increase in size of lobes from 3 5x1.2x.9 mm to 4.1x2.1x 1.2mm and isthmus is .1. No nodule. Tsh slightly high inspite of synthroid.Have hashimoto's is the increase abnormal? Could it be cancer?
2 doctor answers • 3 doctors weighed in
A 27-year-old female asked:
Dx hypothyroid in April, been on synthroid (thyroxine) 0.025mg x 3 months, but TSH went higher (~13) w/ normal ft4. Could viorele birth control cause high TSH?
1 doctor answer • 1 doctor weighed in
A 86-year-old female asked:
In 4/2021 my TSH was 0.14 and my Free T4 was 1.05 ng/dL; my doctor lowered my Synthroid from .88mcg to now .77mcg since then my problems with IBS has been HORRIBLE can this change make such a difference? I have no thyroid?
1 doctor answer • 1 doctor weighed in
A 53-year-old male asked:
Had thyroid lobe removed 3/10/2014. Since then TSH has increased from 2.89 to 4.56. FT4 has been stable. Do I need to be on Synthroid (thyroxine)?
1 doctor answer • 1 doctor weighed in
A 25-year-old female asked:
Diagnosed hypothyroidism 4yrs ago.tsh was 6.5.on synthroid 50 mcg.now tsh over 1.no Antibodies detected.is it autoimmune or not?catch cold frequently
2 doctor answers • 2 doctors weighed in
Last updated Oct 12, 2020

Found in:

Antibody

People also asked

Hypothyroid. TSH started @ 13.8 & ft4 1.3. On synthroid. Antibodies normal. Never had thyroid surgery, meds that affect thyroid. What could be cause?
1 doctor answer • 1 doctor weighed in
Diagnosed with hyperthyroidism. Unknown cause. Tsh in range. Normal t3 high ft4. Negative antibodies for graves and Hashi. Thyroid ultrasound normal. Low b12 lower range vit D. Normal prolactin level. Endo believes its pituitary?
1 doctor answer • 2 doctors weighed in
Had high TSH (4.6). Refused Synthroid (thyroxine). Repeat test: Normal TSH (2.4), normal T4 (0.98), elevated T3 (4.8), negative thyroid antibodies. Any concerns?
1 doctor answer • 1 doctor weighed in
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?
1 doctor answer • 1 doctor weighed in
TSH was 7.3 all other tests within normal ranges.should I take Synthroid or natural thyroid and why?can Lexapro cause high TSH level?
1 doctor answer • 1 doctor weighed in
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
Talk to a doctor now
24/7 visits - just $39!
50% off with $15/month membership

Disclaimer:

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.

Get the Free App for Members

Get the Free App for Doctors

Product

Company

HIPAACompliant
LegitScriptCertified
SOC 2 Type 2Certified
TermsPrivacyCookiesDMCA
Copyright 2022 HealthTap, Inc.