Spironolactone is a widely used medicine in Australia for things like fluid balance, high blood pressure, acne and hormone-related hair growth in women. It blocks aldosterone and has anti-androgen effects, so it can help both medical and cosmetic issues. If you’re considering it, read the basics below so you know what to expect and how to get it safely.
You need a prescription from a GP or specialist. Some people get it through a regular doctor visit, others via a telehealth consult. In Australia, look for a pharmacy that’s clearly registered and displays contact details. Avoid sites that sell without a prescription or won’t provide a pharmacist contact. If you want to buy online, choose an Australian-registered pharmacy or a reputable international seller that asks for a valid prescription and shows licensing information.
Brands you may see include the generic name spironolactone and brand names like Aldactone. Prices vary; ask your pharmacist if there’s a cheaper generic option. For some conditions, your doctor may be able to prescribe it under the Pharmaceutical Benefits Scheme (PBS) — check with them or your pharmacist for eligibility and cost details.
Typical starting doses range from 25–50 mg a day, but your doctor will choose the right dose for your condition. For acne or hair issues, doses commonly sit between 25–100 mg daily and are adjusted slowly. For heart or blood pressure problems, dosing follows different guidance. Never change or stop the dose without talking to your prescriber.
Spironolactone raises potassium levels in some people. Your doctor will usually check blood tests (potassium and kidney function) within 1–2 weeks of starting, then at intervals after that. If you already take an ACE inhibitor, ARB, potassium supplements, or potassium-sparing diuretics, the risk of high potassium goes up — tell your doctor about all medicines and supplements.
Common side effects include dizziness, breast tenderness or enlargement, irregular periods, and tiredness. Serious problems are rare but include marked hyperkalemia (high potassium) and significant kidney issues. Don’t use spironolactone if you’re pregnant or planning pregnancy without specialist advice — it can affect fetal development.
Quick tips: keep hydrated but avoid sudden high-potassium foods or supplements unless your doctor approves; report lightheadedness or muscle weakness right away; store medicine in a cool dry place; and keep regular follow-up tests. If you’re buying online, double-check the pharmacy’s registration, read reviews, and never use a seller that refuses a prescription.
Want help finding a safe online pharmacy or understanding a prescription? Speak with your GP or local pharmacist — they can point you to legitimate options and help set up monitoring that keeps you safe while on spironolactone.
