| Levothyroxine Sodium | 🇺🇸United States | 100MCG/5ML, 100MCG/ML, 200MCG/5ML … | solution | Marketed | Hikma |
| Levothyroxine Sodium | 🇺🇸United States | 0.025MG, 0.025MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.050MG … | tablet | Marketed | Macleods Pharms LTD |
| Levothyroxine Sodium | 🇺🇸United States | 100MCG/VIAL, 200MCG/VIAL, 500MCG/VIAL | powder | Marketed | Piramal Critical |
| Levothyroxine Sodium | 🇺🇸United States | 0.075MG, 0.088MG, 0.112MG … | capsule | Not marketed | Ani Pharms |
| Levo-T | 🇺🇸United States | 0.025MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.05MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.075MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium … | tablet | Marketed | Cediprof INC |
| Levoxyl | 🇺🇸United States | 0.025MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.05MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.075MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium … | tablet | Marketed | King Pharms |
| Thyro-Tabs | 🇺🇸United States | 0.025MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.05MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.075MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium … | tablet | Marketed | Alvogen |
| Levolet | 🇺🇸United States | 0.025MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.05MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.075MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium … | tablet | Marketed | Genus Lifesciences |
| Euthyrox | 🇺🇸United States | 0.025MG, 0.05MG, 0.075MG … | tablet | Not marketed | Emd Serono INC |
| Thyquidity | 🇺🇸United States | 100MCG/5ML | solution | Marketed | Stevens J |
| Ermeza | 🇺🇸United States | 150MCG/5ML | solution | Marketed | Mylan |
| Synthroid | 🇺🇸United States | 0.025MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.05MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.075MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium … | tablet | Marketed | Abbvie |
| Tirosint | 🇺🇸United States | 0.013MG, 0.025MG, 0.0375MG … | capsule | Marketed | Ibsa |
| Tirosint-Sol | 🇺🇸United States | 100MCG/ML, 112MCG/ML, 125MCG/ML … | solution | Marketed | Ibsa |
| Unithroid | 🇺🇸United States | 0.025MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.05MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium, 0.075MG **See current Annual Edition, 1.8 Description of Special Situations, Levothyroxine Sodium … | tablet | Marketed | Stevens J |
| RenThyroidCombination | 🇺🇸United States | | | Status unknown | |
| NP Thyroid 15Combination | 🇺🇸United States | | | Status unknown | |
| NP Thyroid 30Combination | 🇺🇸United States | | | Status unknown | |
| NP Thyroid 60Combination | 🇺🇸United States | | | Status unknown | |
| NP Thyroid 90Combination | 🇺🇸United States | | | Status unknown | |
| NP Thyroid 120Combination | 🇺🇸United States | | | Status unknown | |
| EvexiTHROIDCombination | 🇺🇸United States | | | Status unknown | |
| Thyroxine Cord | 🇺🇸United States | | | Status unknown | |
| ThyroplexCombination | 🇺🇸United States | | | Status unknown | |
| Thyroid HPCombination | 🇺🇸United States | | | Status unknown | |