4-Pregnen-21-oic acid-17α-ol-3-one-7α-thiol γ-lactone 7-acetate, 7α-(Acetylthio)-17α-hydroxy-3-oxopregn-4-ene-21-carboxylic acid γ-lactone
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:
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Quality Level




207-208 °C (lit.)


chloroform: complete 50 mg/ml, clear, faintly yellow



SMILES string




InChI key


Gene Information

human ... HSD17B1(3292), NR3C2(4306)
rat ... Ar(24208)

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Spironolactone was added to rat diet to study the effect of long-term spironolactone use on renal function.


1, 5 g in glass bottle

Biochem/physiol Actions

Spironolactone reduces aldosterone-induced potassium/magnesium loss and myocardial fibrosis. It reduces hypertension, improves the endothelial function and reduces the overall morbidity and mortality in patients with chronic heart failure. Spironolactone improves nitric oxide bioactivity and vascular endothelial vasodilator dysfunction.
Spironolactone is a competitive aldosterone receptor antagonist. Used as potassium sparing diuretic.

Features and Benefits

This compound was developed by Pfizer. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.
This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more.
This compound is featured on the Nuclear Receptors (Steroids) page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.

Preparation Note

Spironolactone yields clear, faint yellow solution in chloroform at 50 mg/ml.

Other Notes

Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. S3378.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin.

Legal Information

LOPAC is a registered trademark of Sigma-Aldrich Co. LLC


Health hazard

Signal Word


Hazard Statements

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


A Sato et al.
Hypertension research : official journal of the Japanese Society of Hypertension, 22(1), 17-22 (1999-04-30)
There is increasing evidence for important cardiovascular effects of aldosterone via classical mineralocorticoid receptors in the heart. Administration of aldosterone with excess salt produces both cardiac hypertrophy and interstitial cardiac fibrosis in rats, and concomitant administration of potassium canrenoate at...
Donna A Volpe et al.
The AAPS journal, 16(1), 172-180 (2013-12-18)
Drug interactions due to efflux transporters may result in one drug increasing or decreasing the systemic exposure of a second drug. The potential for in vivo drug interactions is estimated through in vitro cell assays. Variability in in vitro parameter...
Femke Waanders et al.
American journal of physiology. Renal physiology, 296(5), F1072-F1079 (2009-02-27)
Chronic transplant dysfunction (CTD) is the leading cause of long-term renal allograft loss and is characterized by specific histological lesions including transplant vasculopathy, interstitial fibrosis, and focal glomerulosclerosis. Increasing evidence indicates that aldosterone is a direct mediator of renal damage...
P Moghetti et al.
The Journal of clinical endocrinology and metabolism, 84(4), 1250-1254 (1999-04-13)
GnRH agonists (GnRHa) have recently been proposed for the treatment of hirsutism in women with the polycystic ovary syndrome (PCOS). As most of these subjects have increased androgen secretion from both ovaries and adrenal glands, the association of GnRHa with...
Jakob Nielsen et al.
American journal of physiology. Renal physiology, 283(5), F923-F933 (2002-10-10)
Renal tubule profiling studies were carried out to investigate the long-term effects of administration of spironolactone, a mineralocorticoid receptor antagonist, on abundances of the major Na transporter and Na channel proteins along the rat renal tubule. Oral administration of spironolactone...

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