스피로노락톤

抗雄激素 B

Spironolactone (螺内酯/安体舒通)

Spironolactone (Aldactone)

Oral

Spironolactone (Spiro) is structurally a potassium-sparing diuretic (blood pressure medication) that possesses an unintended, mild anti-androgenic side effect. Because CPA is completely banned by the FDA, Spironolactone reigns as the absolute default anti-androgen in the United States. It relies on receptor blockade rather than lowering testosterone production, and carries severe risks associated with fatal potassium build-up.

Hyperkalemia — The Fatal Heart Risk

Because Spiro is a “potassium-sparing” diuretic, it forces your kidneys to rapidly flush out sodium and water while hoardingly trapping potassium inside your blood ^[1] . If your potassium breaches toxic levels (Hyperkalemia: K⁺ > 5.5 mmol/L), you run an aggressive risk of suffering a sudden, fatal cardiac arrhythmia.

While taking Spironolactone you MUST:

• Submit to strict potassium blood tests (monthly at first, then every 3-6 months).
• Prohibit massive dietary intake of potassium bombs (e.g., eating multiple bananas daily, coconut water, heavy tomato paste).
• Never take any generic dietary potassium supplements.
• Never combine it with ACE inhibitors or ARBs (blood pressure meds) unless strictly supervised by a cardiologist.

GO TO THE ER IMMEDIATELY IF: You feel sudden muscle weakness, heart palpitations, severe shortness of breath, or numbness tingling up your limbs.

Pharmacology

The Mechanism

Spiro’s method of dealing with testosterone is vastly different and arguably weaker than CPA or GnRH Agonists ^{[1] [2]} :

1. Androgen Receptor Blockade (Primary): It clogs up your body’s cell receptors so that testosterone and DHT physically cannot bind to them to trigger masculinization.
2. Mild Synthesis Disruption: It very weakly impairs the enzymes the testes use to manufacture testosterone, lowering actual production only slightly.
3. No Direct T Destruction: Your blood serum testosterone levels may barely drop at all.

The Crucial Misunderstanding: Spironolactone does not chemically obliterate your testosterone count. The T is still floating wildly in your blood, it simply cannot “plug in” to the cells ^[2] . Therefore, measuring your progress via a T-level blood test while on Spiro is incredibly deceptive. You cannot assess Spiro’s effectiveness from the T number alone.

Efficacy Compared to CPA

Spiro is universally considered the weaker anti-androgen option ^[3] :

• Its binding affinity to the androgen receptor is pitifully weak compared to hardcore alternatives like Bicalutamide.
• Because it can’t shut the system down like CPA, many users report hitting a wall at maximum doses without feeling adequately feminized.
• It desperately requires towering levels of estradiol running alongside it to successfully suppress masculinization.

Dosage Recommendations

Phase	Dose	Notes	Sourcing
Starting Dose	50 mg/day	Evaluates tolerability and initial potassium stability.	ES 2017
Standard Titration	100 mg/day	The average effective baseline for most users.	UCSF 2016
The Maximum Ceiling	200 mg/day	Going beyond 200mg invites crippling side effects with zero added anti-androgenic benefit.	ES 2017; WPATH SOC 8

Administration Tips

• Split your pills (take half in the morning, half at night) to stabilize potassium fluctuations and minimize sudden blood pressure drops ^[2] .
• Taking it with food heavily boosts its absorption rate.
• Since it is literally a diuretic designed to empty your bladder, taking it right before bed will absolutely ruin your sleep by forcing you to pee all night. Take your PM dose earlier in the evening.

Higher Doses Don't Work Faster

Pushing past 200 mg/day does not magically crush androgen receptors any harder. It merely exacerbates the plummeting blood pressure and drives your potassium up to a potentially lethal cliff ^[1] . If you hit 200 mg/day and your masculinization isn’t halted, you must switch blockers, or significantly increase your transdermal/injectable estradiol to suppress T organically.

Quality of Life Drawbacks

Besides the severe risk of heart arrhythmias, Spiro inflicts several brutal quality of life downsides:

Crashing Blood Pressure (Orthostatic Hypotension)

Spiro’s primary pharmaceutical purpose is to drop hypertension ^[2] . If you stand up too fast from a chair, you will frequently experience severe dizzy spells or even blackout fainting.

• You MUST aggressively hydrate with plain water every single day.
• Do not restrict your salt intake (unlike potassium, you will crave and heavily need sodium).
• If your natural baseline blood pressure before HRT was already dangerously low, Spiro is likely an unviable option for you.

Constant Urination (Polyuria)

• The drug forces fluid out of your body rapidly. You will pee constantly and feel chronically dehydrated. Drink endless water.

Mandatory Monitoring Protocol

Test Panel	Frequency	Target Range / Warning	Action Needed
Potassium (K⁺)	Months 1, 2, 3 → Then every 6 mos	K⁺ 3.5-5.0 mmol/L	If > 5.5: Stop drug, hit ER.
Kidney Function (Creatinine / eGFR)	At baseline + every 6 months	eGFR > 60 mL/min	If crashing: Stop Spiro before kidney collapse.
Blood Pressure	Every clinic visit	No severe dizzy spells	If chronically fainting: Cut dose.

Global Access

Because CPA is banned in America, Spiro is the undisputed king of US pathways:

• In the US: Handed out freely at Informed Consent clinics (like Planned Parenthood). Massively accessible, universally stocked, and extremely cheap under insurance/GoodRx.
• In Europe/Asia: Used almost exclusively as a fallback drug for people whose livers cannot handle CPA, or those who survived a brain tumor via CPA.
• DIY Risk: While Spiro itself is rarely faked, trying to DIY manage Spiro without paying for private kidney panels is playing Russian roulette with a heart attack.

品牌图鉴

🇨🇳中国

螺内酯 / 安体舒通

厂商

多种国产厂商

规格

20mg × 100片

外观

白色小圆片

中国大陆最廉价易得的抗雄药物，OTC 可购

🇮🇳印度

Aldactone

厂商

RPG Life Sciences / Pfizer India

规格

25mg / 50mg / 100mg

外观

白色至类白色圆形片

印度版螺内酯，多种规格可选

🇺🇸美国

Aldactone

厂商

Pfizer

规格

25mg / 50mg / 100mg

外观

白色/黄色薄膜衣片

原研品牌，美国 HRT 最常用抗雄

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