The effect of danazol on anterior pituitary function

Area of Science:

• Endocrinology
• Pharmacology

Background:

• Danazol is a synthetic steroid with various endocrine effects.
• Understanding its impact on pituitary hormones is crucial for clinical application.

Purpose of the Study:

• To investigate the effects of danazol on basal and stimulated levels of key pituitary and adrenal hormones.
• To assess danazol's impact on follicle-stimulating hormone (FSH), luteinizing hormone (LH), thyroid-stimulating hormone (TSH), prolactin (PRL), and cortisol.

Main Methods:

• Five postmenopausal women and five normal adult men received danazol 600 mg daily for 15 days.
• Basal hormone levels (FSH, LH, TSH, PRL, cortisol) were measured before and during treatment.
• Hormonal response to combined gonadotropin-releasing hormone (GnRH) and thyrotropin-releasing hormone (TRH) stimulation was evaluated.

Main Results:

• Danazol significantly reduced basal FSH and LH levels.
• A diminished cumulative response to GnRH was observed after danazol treatment.
• No significant changes were noted in basal or TRH-stimulated TSH and PRL levels.
• Basal cortisol secretion remained unaffected by danazol.

Conclusions:

• Danazol exerts an inhibitory effect on the gonadotropic axis (FSH and LH).
• Danazol does not appear to significantly interfere with the thyrotropic axis (TSH) or prolactin secretion.
• The drug does not alter basal cortisol secretion in healthy individuals.