Version October 2024
| Generic name | Composition | Brand names* | Average adult dose/day (oral) |
| Levothyroxine¶ | T4 | Tablets:Δ Euthyrox, Levoxyl, Synthroid, Unithroid | 112 to 125 mcg |
| Soft gel capsules:◊ Tirosint | |||
| Oral solutions:§ Ermeza, Tirosint-Sol, Thyquidity | |||
| Liothyronine | T3 | Tablets:¥ Cytomel | 37.5 mcg‡ |
| Desiccated thyroid extract (Thyroid USP) | 4:1 mixture of T4 and T3 (approximately) | Tablets:† Adthyza, Armour Thyroid, Niva Thyroid, NP Thyroid | 90 mg |
| 1 grain of desiccated thyroid extract (60 mg) should contain approximately 38 mcg T4 and 9 mcg T3 | |||
| Pork origin |
T3: triiodothyronine; T4: thyroxine.
* Generic preparations may also be available.
¶ Best preparation.
Δ Available in tablet strengths from 25 to 300 mcg.
◊ Available in capsule strengths from 13 to 200 mcg.
§ Ermeza is available as a 150 mcg/5 mL oral solution (75 or 150 mL per bottle). Tirosint-Sol is supplied in 1 mL unit dose ampules of varying concentrations from 13 to 200 mcg/mL. Thyquidity is available as a 100 mcg/5 mL oral solution (100 mL per bottle).
¥ Available in tablet strengths of 5, 25, and 50 mcg.
‡ Dose reserved for patients with differentiated thyroid cancer undergoing levothyroxine withdrawal before radioiodine therapy.
† Available in tablet strengths from 15 to 300 mg.Do you want to add Medilib to your home screen?
