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A member asked:
Tsh was 5, started 50mcg levothroxine on friday. bloodwork monday and it showed tsh was 2.3. is it possible that it effected blood work that fast?
A doctor has provided 1 answer
Variation: TSH levels vary throughout the day so different readings on separate days are not unusual in you case the difference is quite big though in part because of the affect of your Levo on tsh release by the pituitary glad although it is conventional wisdom that 4-6 weeks is needed before testing after thyroid initiation is done, we seen much sooner effects in real practice.
Answered 5/18/2016
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