Thyroid hormone
Levothyroxine (T4)
White capsule contents
Typical Strength
per prescriber
Formulations
0 compounds
Formula
C₁₅H₁₁I₄NO₄
Mol. Weight
776.87 g/mol
How It Works
Mechanism of action
Synthetic T4 that the body converts to active T3 as needed, providing a steady hormone reservoir. Compounding allows dye-free, filler-free, and exact-microgram formulations for sensitive or hard-to-titrate patients.
What compounding can change
When Levothyroxine (T4) is compounded for one patient, your prescriber can choose the concentration, combine it with other ingredients, and pick the base. Commercial products come in fixed strengths and bases.
Safety Considerations
Please note: Compounded medications require a prescription from a licensed prescriber for an individual patient. Compounded medications are not FDA-approved. The FDA does not review them for safety, effectiveness or quality. A compounded medication is not the same as, or a generic version of, any FDA-approved drug. This page is general information, not medical advice. Your prescriber decides whether a treatment is right for you and sets the final ingredients, strength and dosage form.