Thyroid hormones
- Replace deficient thyroid hormone
- Levothyroxine (T4) is standard therapy
- Liothyronine (T3) acts faster/shorter
- TSH usually guides primary-hypothyroid dosing
- Iron/calcium reduce levothyroxine absorption
- Excess dosing → AF, bone loss + anxiety
- Routine T3 combination therapy is uncommon
Class at a glance
- Replace deficient thyroid hormone
Practical pearls
- Levothyroxine (T4) is standard therapy
Other practical pearls
- Liothyronine (T3) acts faster/shorter
- TSH usually guides primary-hypothyroid dosing
Members / distinctions
- Iron/calcium reduce levothyroxine absorption
- Excess dosing → AF, bone loss + anxiety
- Routine T3 combination therapy is uncommon
Drugs in this class (3)
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