Spironolactone Warnings & Precautions

Before taking Spironolactone, inform your doctor of all your medical conditions and medications. Certain conditions and patient groups require special precautions or may make Spironolactone unsuitable.

Key Warnings

→Monitor electrolytes regularly — potassium and sodium particularly
→Potassium-sparing diuretics combined with ACE inhibitors or ARBs cause dangerous hyperkalaemia
→Avoid in severe dehydration
→Hold dose during acute illness causing dehydration

Pregnancy and Breastfeeding

→Diuretics are generally avoided in pregnancy as they reduce plasma volume. Exceptions exist for specific conditions (e.g., furosemide in pulmonary oedema). Discuss with your doctor.

Older Adults

→Significantly increased risk of electrolyte disturbances, falls (dizziness, postural hypotension), and acute kidney injury. Start at lowest doses. Monitor electrolytes closely. Thiazides increase hyponatraemia risk.

Chronic Conditions

→Renal impairment: thiazides lose efficacy at low eGFR; loop diuretics preferred. Gout: thiazides worsen gout — consider alternative. Diabetes: thiazides worsen glycaemic control.

When Not to Use

→Anuria
→Severe hyponatraemia or hypokalaemia
→Potassium-sparing agents in hyperkalaemia or severe renal impairment

Safety Note

Spironolactone should only be taken as prescribed. If you have any concerns about whether Spironolactone is suitable for you, consult your doctor or pharmacist.

Frequently Asked Questions

Is Spironolactone safe for everyone?

Spironolactone is not suitable for everyone. Monitor electrolytes regularly — potassium and sodium particularly Always inform your doctor of all medical conditions before starting Spironolactone.

Why should I take my diuretic in the morning?

Diuretics increase urine production for several hours after taking them. Taking them in the morning allows this effect to occur during the day rather than disrupting sleep with nocturia (frequent nighttime urination).

More About Spironolactone

Dosage & Administration

Side Effects

Drug Interactions

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Medical Disclaimer: This drug reference is provided for informational purposes only and is not a substitute for professional medical advice. Always consult your physician or pharmacist before changing your medication. Information reviewed by the vHospital Editorial Team · Sources: WHO, BNF, FDA prescribing information.