Endocrine \u00b7 HRT
HRT and thyroid medication: dose adjustments
Estrogen raises thyroid-binding globulin. Oral HRT typically requires a modest levothyroxine dose increase; transdermal estradiol usually does not. Check TSH at 6\u20138 weeks after starting or switching.
Key points
- Recheck TSH at 6–8 weeks
- Split doses of levothyroxine and estrogen by 4+ hours
- Use transdermal estradiol if fine-tuning is difficult
Frequently asked questions
Do I need to change my thyroid dose on HRT?
On oral estrogen — often yes. On transdermal — usually not.
When should I recheck TSH?
6–8 weeks after starting HRT or changing dose.
Which route avoids the issue?
Transdermal estradiol.
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Written and medically reviewed by the Kindr Health Clinical Team · Published 2026-06-19 · Last reviewed 2026-07-01. Compounded medications are prepared by FDA-registered 503A pharmacies and are not FDA-approved drug products.