TSH Over 100? Check Cortisol Before You Start Levothyroxine

Daily Clinical Pearl Endocrinology Free for Basic Members

The Hidden Danger in Severe Hypothyroidism

When TSH crosses 100, the gland that is failing may not be the only one.

Many patients will visit your chamber carrying their thyroid reports. They will place the papers on your desk, look at you, and say:

“Sir, my thyroid levels are high β€” please prescribe a treatment.”

You review the report. The TSH reads 132 mIU/mL β€” an extremely elevated level. You order Anti-TPO antibodies and Anti-Thyroglobulin antibodies for further evaluation, and you reach for the prescription pad to start Levothyroxine.

As general physicians, we often forget to order one more test β€” a serum cortisol. Today, we will discuss why this single missing investigation can turn a routine thyroid prescription into a life-threatening crisis: the relationship between severe hypothyroidism and adrenal insufficiency.
Specialty: Endocrinology 3-Minute Read Pre-prescription Safety Check

Want the Full Thyroid Framework?

This pearl covers the one safety check before Levothyroxine. For the full holistic walkthrough β€” thyroid storm, myxedema coma, Wolff-Chaikoff, NO SPECS, euthyroid sick syndrome β€” read the 34-page deep-dive note on Thyroid Emergencies & Disorders.

Read the Deep Dive β†’
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