Switching from Natural Desiccated Thyroid to a Liquid Formulation of Levothyroxine for Hypothyroidism

Table 1

Excipients in commercially available thyroid treatments.

Excipient	Branded or generic LT4 tablets	Natural dessicated thyroid	Liquid LT4 formulation
Animal-sourced ingredients		X
Corn starch	X
Dyes	X
Gluten
Glycerol			X
Lactose	X
Magnesium or calcium stearate	X	X
Microcrystalline cellulose
Povidone	X
Sodium starch glycolate	X
Sucrose or dextrose	X	X
Talc	X
Water			X

In some formulations.