SHEET /m/levothyroxine · PubChem CID 5819 · CAS 51-48-9 · REV 2026.07
marquee
Levothyroxine
from sourceC15H11I4NO4 · 776.87 g/mol
L-thyroxine · Levothyroxin Delalande
What is Levothyroxine?
The manufactured copy of the body's own thyroid hormone, taken when the thyroid does not make enough. One of the most dispensed medicines anywhere. from source
CategoryPrescription medicine
LeaderboardsBiggest
Fig. 1 · 2D structure RDKit
SMILES
C1=C(C=C(C(=C1I)OC2=CC(=C(C(=C2)I)O)I)I)C[C@@H](C(=O)O)NWhere you'll find it
Dispensed on prescription, not sold on a shelf. See the rest of the prescription medicine group.
Toxicity & hazards
DangerIrritantHealth hazardH302, H361, H372from source
Keep roaming
Where Levothyroxine leads
Relatedcomputed
Thyroxine100% similarBoth carry a phenol, a carboxylic acid and an ether group.Triiodothyronine74% similarBoth carry a phenol, a carboxylic acid and an ether group.L-DOPA43% similarBoth carry a phenol, a carboxylic acid and an amine group.Tyrosine43% similarBoth carry a phenol, a carboxylic acid and an amine group.Phenylalanine41% similarBoth carry a carboxylic acid and an amine group.