Prescription drug Published: RCT evidence Extensive real-world use

Spironolactone: dosing, timing and what to expect

Potassium-sparing diuretic and antiandrogen — prescribed for blood pressure, hormonal acne and PCOS-pattern symptoms, and in feminizing HRT.

Also known as Aldactone

Educational research reference Prescription Medications

Quick reference. Everything you need to run Spironolactone — dosing, frequency, reconstitution math for the vial sizes people actually buy, and what it stacks with. For anything specific to your situation, ask the Guru.

Spironolactone quick start

Route: Oral
Typical dose: Physician-set — commonly 25–200 mg/day
Frequency: Daily
Half-life: ~1.4 h, active metabolites ~15 h.
Cycle: Continuous under physician supervision.

These are the numbers people actually run, drawn from the published record and from what the community has settled on over time. Educational reference, not medical advice — a starting point to work from, and one you can adjust as you learn how you respond.

How to run it

How often: Daily
Cycle length: Continuous under physician supervision.
Half-life: ~1.4 h, active metabolites ~15 h.
Route: Oral

Consistency matters more than perfect timing. Pick a slot in your day you will actually keep, and let DoseIQ handle the rest.

For women

One of the most-prescribed drugs for hormonal acne and PCOS symptoms in women; pregnancy requires stopping it.

What to expect

Most people tolerate Spironolactone well. Here is what is worth knowing going in, so nothing catches you by surprise.

Raises potassium — additive with ACE inhibitors and ARBs, and worth a periodic potassium lab. As an antiandrogen it works directly against TRT — flagging that contradiction is the point of tracking it.

Known interactions

Interactions involving Spironolactone's drug class that DoseIQ screens for. Each one cites where it comes from — an FDA label section or the published record — because an interaction warning you can't trace is just noise.

Serious Lithium + diuretics — lithium levels rise

Thiazides in particular reduce lithium clearance; the level climbs within days.

What to do: Never add or change a diuretic on lithium without the prescriber knowing — levels get rechecked.

Source: FDA label, lithium §7

Caution Spironolactone + ACE/ARB — potassium climbs from both

Both raise potassium; together they can push it high enough to matter.

What to do: A periodic potassium level is the whole answer — cheap, and your prescriber will agree.

Source: FDA label, spironolactone §7

Worth knowing Spironolactone blunts testosterone

Spironolactone blocks androgen receptors — it works directly against TRT's purpose.

What to do: Sometimes intentional (acne dosing is low); worth confirming the prescribers know about each other.

Source: Spironolactone pharmacology

Worth knowing PDE5 + blood-pressure medication — additive lowering

Usually fine and often co-prescribed, but stacked vasodilation can show up as lightheadedness.

What to do: Rise slowly; mention dizziness to your prescriber.

Source: FDA labels, sildenafil/tadalafil §7

DoseIQ screens your whole protocol against these rules automatically — every compound, prescription and supplement you track, cross-checked as you add them. Serious flags are always free.

Preparing it

Spironolactone does not need reconstituting — it comes ready to use.

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This page is an educational research reference and is not medical advice. Dose figures reflect the published record and what the community has converged on — starting points to weigh, not instructions. Consult a qualified healthcare provider before starting any protocol.