RenThyroid (LEVOTHYROXINE and LIOTHYRONINE) 57 ug / 13.5 ug

TABLETORALGenus LifesciencesNDC: 64950-173Updated: Mar 2026

Active Ingredients

⚠️ 1 ingredient flagged as common allergen

Mannitol

⚠️ Yes — Mannitol

Filler/Sweetener

Calcium Stearate

Lubricant

Microcrystalline Cellulose

Filler/Binder

Silicon Dioxide

Glidant

Ingredient	Purpose	Common Allergen?	Description
Mannitol	Filler/Sweetener	⚠️ Yes — Mannitol	A sugar alcohol used as a sweetener and bulking agent. Can cause osmotic diarrhea in sensitive individuals.
Calcium Stearate	Lubricant	No	A calcium salt of stearic acid used as a tablet lubricant to prevent sticking during manufacturing.
Microcrystalline Cellulose	Filler/Binder	No	Refined wood pulp used as a filler and binder. Generally inert and well-tolerated.
Silicon Dioxide	Glidant	No	A mineral (silica) used to improve powder flow during tablet manufacturing. Also called colloidal silicon dioxide.

This medication contains ingredients flagged in the following groups. Patients with these sensitivities should consult their prescriber.

1 ingredient may contain mammalian-derived components:

Calcium Stearate(Possible — Stearates can be plant- or animal-derived (verify source).)