Methylthiouracil

Methylthiouracil

Clinical data
ATC code	H03BA01 (WHO)
Identifiers
IUPAC name 6-methyl-2-sulfanylidene-1H-pyrimidin-4-one
CAS Number	56-04-2
PubChem CID	667493
E number	{{#property:P628}}
ECHA InfoCard	{{#property:P2566}}
Chemical and physical data
Formula	C5H6N2OS
Molar mass	142.18 g/mol

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Methylthiouracil is an antithyroid preparation. It is a thioamide, closely related to propylthiouracil.

Methylthiouracil is not used clinically in the United States, it has a similar mechanism of action and side effect to that of propylthiouricil.

The drug acts to decrease the formation of stored thyroid hormone, as thyroglobulin in the thyroid gland.

The clinical effects of the drug to treat the hyperthyroid state can have a lag peroid of up to two weeks, depending on the stores of thyroglobulin and other factors.

Like with any drug a wide variety of side effects can occur, but four topics should be kept in mind and the patient informed:

Agranulocytosis - develops rapidly, soar throat and fever are hallmark symptoms. Can be fatal if drug is not discontinued promptly.

Allergic Skin reactions the most dangerous of which is Exfoliative Dermatitis, it rapidly can get out of control, notify the physician should a skin eruption occur.

Hepatitis - yellowing of the skin, nausea, yellowing of the whites of the eyes, flu like symptoms.

Thombocytopenia - unusual brusing or bleeding.

Source: Goodman and Gillman's Pharmacological Basis of Therapeutics, 6th edition, and Facts and Comparisons.

see link on discussion of Hyperthyrodism: http://www.merck.com/mmpe/sec12/ch152/ch152e.html#S12_CH152_T002 Template:Thyroid therapy