Also Known As: Protirelin, Thyrel trh

Thyrotropin-releasing hormone (TRH), also called thyrotropin-releasing factor (TRF), thyroliberin or protirelin, is a tropic, tripeptidal hormone that stimulates the release of TSH (thyroid-stimulating hormone) and prolactin from the anterior pituitary. TRH has been used clinically for the treatment of spinocerebellar degeneration and disturbance of consciousness in humans.[1]

It is used in pharmacology (brand name Relefact TRH) to test the response of the anterior pituitary gland.

Medical preparations of TRH are used in diagnostic tests of thyroid disorders and in acromegaly.

A TRH test may be indicated if secondary hypothyroidism is suspected.

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