Free T4 test when symptoms persist on levothyroxine
FT4 as well as TSH
tests per year, UK, when symptoms continue after starting levothyroxine
“Consider measuring FT4 as well as TSH for adults who continue to have symptoms of hypothyroidism after starting levothyroxine.”
NICE NG145, Thyroid disease: assessment and management, section 1.3, 2019-11
- Kind of source
- Clinical guideline
- Read on
- 2026-11-06
- Daily check
- Quote found at the source on 2026-11-06
- What to know
- Added to the routine TSH test only when symptoms persist.
Used in
Kept as evidence; no figure on the platform is computed from it yet.