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Oral progestational activity of spironolactone
The Journal of Clinical Endocrinology and Metabolism
|September 1, 1978
Summary
Spironolactone exhibits progestational activity, affecting reproductive cycles in animal models. This activity is consistent with menstrual irregularities observed in women using spironolactone.
Area of Science:
- Endocrinology
- Reproductive Biology
- Pharmacology
Background:
- Spironolactone is a medication with known effects on the endocrine system.
- Its impact on reproductive hormonal activity requires further elucidation.
Purpose of the Study:
- To investigate the progestational activity of spironolactone.
- To correlate animal model findings with clinical observations in women.
Main Methods:
- Assessing endometrial glandular development in estrogen-primed rabbits following spironolactone administration.
- Evaluating the effects of spironolactone on estrogen-withdrawal bleeding and menstrual cycles in rhesus monkeys.
Main Results:
- Spironolactone induced significant glandular development in rabbit endometrium across tested dosages (50-200 mg/kg).
- In rhesus monkeys, spironolactone (400 mg/monkey) delayed bleeding post-estrogen withdrawal and inhibited menstruation in cycling subjects.
Conclusions:
- Spironolactone demonstrates progestational effects in preclinical animal models.
- These findings support the observed menstrual irregularities and amenorrhea in women undergoing spironolactone treatment.