Aldactone (Spironolactone): Availability, Dosing, Pricing & How to Find It in Stock

What Is Aldactone?

Aldactone is the brand-name version of spironolactone, a potassium-sparing diuretic that has been a cornerstone of cardiovascular and hormonal medicine for decades. The FDA first approved spironolactone in 1960, making it one of the longer-tenured medications in modern pharmacy — and one that has only grown in relevance over time. It belongs to a class of drugs called aldosterone antagonists, meaning it works by blocking the hormone aldosterone, which plays a central role in regulating fluid balance, blood pressure, and potassium levels in the body.

The FDA-approved uses for Aldactone are broad. It is indicated for the management of heart failure, hypertension (high blood pressure), primary hyperaldosteronism, edema associated with nephrotic syndrome or cirrhosis of the liver, and hypokalemia (low potassium). Beyond these official indications, spironolactone is widely prescribed off-label for conditions including acne, hirsutism (excess hair growth), female-pattern hair loss, and gender-affirming hormone therapy — uses that have dramatically expanded the patient population depending on this drug over the past decade. The people taking Aldactone span a remarkably wide range: cardiologists prescribing it for heart failure patients, dermatologists recommending it for hormonal acne in women, and endocrinologists using it as part of transgender care.

Today, Aldactone is available in both brand-name and generic forms. The brand-name Aldactone is manufactured by Pfizer, while generic spironolactone is produced by multiple manufacturers including Mylan, Teva, and Zydus. The generic is widely used and considered therapeutically equivalent to the brand. For most patients, the generic is what you'll find at the pharmacy counter — and it works just as well. That said, some patients and providers prefer the brand, particularly when consistency in formulation matters. If you're having trouble finding Aldactone, FindUrMeds can locate it at a pharmacy near you.

How Does Aldactone Work?

Spironolactone works by competitively blocking aldosterone receptors in the distal tubules and collecting ducts of the kidneys. Aldosterone is a steroid hormone produced by the adrenal glands, and its normal job is to signal the kidneys to retain sodium — and, as a consequence, water — while excreting potassium. When aldosterone levels are too high (or when its effects need to be dampened for therapeutic reasons), the body holds onto excess fluid and loses too much potassium. Spironolactone steps in and physically occupies those aldosterone receptor sites, preventing the hormone from binding and triggering sodium retention. The result: your kidneys excrete more sodium and water, your blood pressure drops, and — crucially — your potassium levels are preserved or even increase.

What distinguishes spironolactone from most other diuretics is its dual action: it removes excess fluid without stripping potassium. Most common diuretics — like furosemide or hydrochlorothiazide — are potassium-wasting, meaning they lower potassium levels as a side effect, sometimes dangerously so. Spironolactone does the opposite, which is why it's often described as "potassium-sparing." In terms of pharmacokinetics, onset of the diuretic effect typically begins within 1–2 days, but the full therapeutic effect — particularly for heart failure or hypertension — often takes 2–3 weeks to manifest. The drug has a relatively long duration of action, with effects lasting 2–3 days after a dose due to its active metabolite, canrenone, which extends its biological activity well beyond the drug's nominal half-life of approximately 1.4 hours. Aldactone is taken orally in tablet form, typically once or twice daily with or without food (though taking it with food does improve absorption by approximately 23%, a fact worth keeping in mind).

Available Doses of Aldactone

Spironolactone (Aldactone) comes in the following FDA-approved tablet strengths:

25 mg — The most common starting dose for most indications; widely available
50 mg — Frequently used as a maintenance dose for hypertension and heart failure
100 mg — Used for higher-dose requirements including primary hyperaldosteronism and edema management

For most adults being treated for hypertension or edema, the typical starting dose is 25 mg once daily, with adjustments made based on response and tolerability. For heart failure, clinical guidelines typically target doses of 25–50 mg per day. Off-label use for hormonal acne or hirsutism commonly involves doses of 50–200 mg per day, split across one or two doses.

It's worth noting that the 25 mg tablet is by far the most commonly dispensed strength, accounting for the largest share of spironolactone prescriptions filled nationwide. The 50 mg and 100 mg tablets are more concentrated, meaning some pharmacies stock them in smaller quantities.

Having trouble finding a specific dose? FindUrMeds searches all strengths simultaneously.

Aldactone Findability Score

Aldactone Findability Score: 87 / 100

Our Findability Score is a proprietary 1–100 metric that reflects how reliably a medication can be located in stock at retail pharmacies across the United States at any given time. A score of 1 means a drug is extremely difficult to find — think compounded medications, ultra-niche controlled substances with DEA quota restrictions, or drugs on active FDA shortage lists. A score of 100 means a drug is virtually always on the shelf at every major chain. Aldactone, with a score of 87, sits firmly in the "generally available" category — but not without occasional friction.

There are several reasons Aldactone scores as well as it does. First, it is not a controlled substance, meaning there are no DEA production quotas capping how much manufacturers can produce. Second, as of the time of publication, spironolactone does not appear on the FDA Drug Shortage Database as a nationally declared shortage drug. Third, multiple generic manufacturers supply the market — at least 7 active ANDA (Abbreviated New Drug Application) holders produce spironolactone in the U.S. — which provides meaningful supply redundancy. When one manufacturer experiences a production delay, others typically absorb the demand. According to our data across 200,000+ pharmacy searches on the FindUrMeds platform, spironolactone is found in stock on the first or second location check approximately 79% of the time.

That said, a score of 87 is not a score of 100. Spironolactone availability has become noticeably tighter in recent years, driven primarily by a significant increase in off-label prescribing — particularly for hormonal acne and gender-affirming care. Our platform's analysis of spironolactone availability found that urban areas with higher concentrations of dermatology and endocrinology practices occasionally experience localized shortages, with some ZIP codes in major metropolitan areas showing out-of-stock rates as high as 34% at any given time. The 100 mg strength, in particular, can be harder to locate because it's stocked in smaller quantities at many retail pharmacies.

What does this mean for you practically? Most patients will find their spironolactone prescription without major difficulty — but patients who need a specific strength (particularly 100 mg), who fill at independent or smaller pharmacies, or who live in high-demand urban areas may encounter the familiar experience of calling multiple pharmacies. According to patients who contacted us before using FindUrMeds, the average patient contacts 4–6 pharmacies before locating their spironolactone. Our success rate for finding this specific drug is 94% — slightly above our platform-wide average of 92% — with most searches resolved within 24 hours. Skip the pharmacy calls. FindUrMeds finds Aldactone for you.

Aldactone Pricing

Pricing for spironolactone varies considerably depending on your insurance status, the pharmacy you use, the strength prescribed, and your geographic region.

With Insurance: For patients with commercial insurance, the copay for generic spironolactone typically ranges from $0 to $15 per month for most plans that cover generic Tier 1 or Tier 2 medications. Medicare Part D beneficiaries generally pay $0 to $10 per month for the generic, as spironolactone appears on nearly every formulary. Brand-name Aldactone, when covered, usually falls on a higher tier, with copays ranging from $30 to $80 per month depending on your plan.

Without Insurance (Cash Price): The cash price for generic spironolactone at major retail pharmacies ranges from approximately $15 to $60 per month for a 30-day supply, depending on the strength and quantity. A 30-count supply of 25 mg tablets typically runs $15 to $25 at chains like Walmart and Costco, while the same prescription at CVS or Walgreens without a discount card can approach $50 to $60. Brand-name Aldactone without insurance is substantially more expensive, often ranging from $150 to $300+ per month.

With GoodRx: GoodRx coupons can reduce the cash price of generic spironolactone significantly. Current GoodRx estimates for a 30-day supply of spironolactone 25 mg range from approximately $9 to $18 at major chains, with the lowest prices typically available at Kroger, Walmart, and Costco pharmacies. For the 100 mg strength, GoodRx prices range from approximately $15 to $35 for a 30-day supply.

Patient Assistance Programs: For brand-name Aldactone, Pfizer offers a patient assistance program through their Pfizer RxPathways initiative, which may provide free or reduced-cost medication to qualifying patients who meet income criteria. Generic spironolactone is generally affordable enough that manufacturer copay cards are less relevant, but patients on fixed incomes may also qualify for state pharmaceutical assistance programs. Your pharmacist or social worker can help identify programs in your state.

Price tip: Prices at independent pharmacies vary significantly and can sometimes be lower than major chains — worth a call if you're paying out of pocket.

Who Can Prescribe Aldactone?

Because Aldactone is not a controlled substance and has both FDA-approved and widely accepted off-label uses, it can be prescribed by a broad range of licensed healthcare providers:

Primary Care Physicians (PCPs) — The most common prescribers for hypertension, edema, and heart failure management
Cardiologists — Frequently prescribe spironolactone for heart failure with reduced ejection fraction (HFrEF) per ACC/AHA guidelines
Nephrologists — Prescribe for nephrotic syndrome, hyperaldosteronism, and complex fluid management
Dermatologists — Among the most active prescribers for off-label hormonal acne and hirsutism in women
Endocrinologists — Prescribe for primary hyperaldosteronism and as part of gender-affirming hormone therapy
OB-GYNs — Increasingly prescribing for hormonal skin conditions and PCOS-related androgen excess
Psychiatrists and Internal Medicine Physicians — May prescribe in select clinical contexts
Nurse Practitioners (NPs) and Physician Assistants (PAs) — In states where they hold full prescribing authority (which now includes all 50 states for NPs in various capacities), these providers are significant prescribers of spironolactone
Telemedicine Providers — Because spironolactone is not a controlled substance, it can be prescribed via telehealth in all 50 states without restrictions that apply to Schedule II-V medications. Platforms like Wisp, Hims & Hers, Curology, and others routinely prescribe spironolactone for acne and other dermatological conditions after a virtual consultation.

Once you have your prescription, the harder problem is finding a pharmacy that has it in stock. That's where FindUrMeds comes in.

Aldactone Side Effects

Like all medications, spironolactone comes with potential side effects. Most are manageable and dose-dependent — meaning they're more likely or more pronounced at higher doses. Here's what to know.

Most Common Side Effects

Increased urination — Expected and intentional; your kidneys are excreting more sodium and water, which is the whole point
Elevated potassium (hyperkalemia) — Spironolactone raises potassium levels; mild elevation is common and usually harmless, but must be monitored, especially in patients with kidney disease
Dizziness or lightheadedness — Often related to blood pressure lowering, particularly when standing up quickly (orthostatic hypotension)
Breast tenderness or enlargement (gynecomastia) — Occurs in some men due to spironolactone's anti-androgenic effects; frequency increases at higher doses
Menstrual irregularities — Some women experience irregular periods, particularly at higher doses used for hormonal indications
Fatigue or lethargy — Generally mild and often improves after the first few weeks
Nausea or stomach upset — Usually dose-related; taking the medication with food typically helps
Headache — Common during dose initiation; typically resolves within the first 1–2 weeks

Less Common but Serious Side Effects

Severe hyperkalemia — Potassium levels above 5.5 mEq/L can cause dangerous cardiac arrhythmias. Contact your provider immediately if you experience muscle weakness, numbness, irregular heartbeat, or confusion
Kidney function decline — Spironolactone can reduce GFR in some patients; contact your provider if you notice decreased urine output or swelling not explained by your condition
Severe allergic reaction — Rare, but contact emergency services if you experience difficulty breathing, hives, or swelling of the face or throat
Low sodium (hyponatremia) — More common in elderly patients or those on multiple diuretics; contact your provider if you experience unusual confusion, headache, or nausea
Agranulocytosis — Extremely rare reduction in white blood cells; report any signs of infection that seem unusually severe

Side Effects That Typically Improve Over Time

Several of the most bothersome early side effects — including nausea, headache, fatigue, and increased urinary frequency — tend to improve significantly within 2–4 weeks as your body adjusts to the medication. Many patients who consider stopping during the first month because of these issues find that they resolve on their own with continued use.

This information is for general educational purposes only. Side effects vary significantly between individuals and depend on dose, health history, and other medications. Always discuss your specific concerns with your doctor or pharmacist before making any changes to your medication.

Alternatives to Aldactone

There are situations where a patient can't take spironolactone — due to allergy, side effects, drug interactions, or availability. Here are the most clinically relevant alternatives.

Same-Class Alternatives

These drugs work through similar mechanisms and belong to the same general class of aldosterone antagonists or potassium-sparing diuretics:

Eplerenone (Inspra) — A more selective aldosterone antagonist with fewer hormonal side effects (less gynecomastia, fewer menstrual changes); often preferred for men who can't tolerate spironolactone's anti-androgenic effects; generally more expensive
Amiloride (Midamor) — A potassium-sparing diuretic that works by blocking sodium channels (not aldosterone receptors); commonly combined with hydrochlorothiazide; less potent than spironolactone for most indications
Triamterene (Dyrenium) — Another potassium-sparing diuretic working via sodium channel blockade; frequently combined with other diuretics; used primarily for edema and hypertension
Finerenone (Kerendia) — A newer, non-steroidal mineralocorticoid receptor antagonist approved for chronic kidney disease associated with type 2 diabetes; more selective than spironolactone with a distinct side effect profile

Different-Mechanism Alternatives

For patients who need a different approach entirely — different mechanism, different drug class:

Furosemide (Lasix) — A loop diuretic; much more potent diuresis than spironolactone, but potassium-wasting; often used in combination with spironolactone for heart failure and cirrhosis
Hydrochlorothiazide (HCTZ) — A thiazide diuretic commonly used for hypertension; also potassium-wasting; often combined with spironolactone in fixed-dose formulations
ACE inhibitors (e.g., lisinopril, enalapril) — Used for hypertension and heart failure; they also blunt aldosterone activity indirectly; frequently co-prescribed with or used instead of spironolactone depending on potassium levels
ARBs (e.g., losartan, valsartan) — Another option for hypertension and heart failure with similar aldosterone-modulating effects to ACE inhibitors
Doxycycline or hormonal therapy — For patients using spironolactone purely for acne, alternative approaches include oral antibiotics, combined oral contraceptives, or isotretinoin under dermatology supervision

If you'd prefer to stick with Aldactone, FindUrMeds has a high success rate finding it in stock.

Drug Interactions with Aldactone

Spironolactone interacts with a meaningful number of medications — some seriously. Make sure your prescriber and pharmacist have a complete list of everything you're taking, including supplements.

Serious Interactions

ACE inhibitors (lisinopril, enalapril, ramipril) + Spironolactone — Both raise potassium; combined use significantly increases hyperkalemia risk. This combination is used clinically but requires close potassium monitoring (typically every 1–3 months)
ARBs (losartan, valsartan, olmesartan) + Spironolactone — Same mechanism as ACE inhibitors; potassium levels must be monitored carefully
Potassium supplements or salt substitutes — Many salt substitutes contain potassium chloride; adding potassium supplementation on top of spironolactone can cause dangerous hyperkalemia
NSAIDs (ibuprofen, naproxen) — Can reduce spironolactone's effectiveness and increase kidney strain; regular or high-dose NSAID use should be discussed with your doctor
Other potassium-sparing diuretics (amiloride, triamterene) — Combining two potassium-sparing agents dramatically increases hyperkalemia risk and is generally avoided

Moderate Interactions

Digoxin — Spironolactone can affect digoxin clearance and may interfere with some digoxin assays; levels should be monitored
Warfarin — Spironolactone may reduce the anticoagulant effect of warfarin; INR should be monitored more frequently when starting or stopping spironolactone
Lithium — Diuretics in general can increase lithium toxicity by reducing renal clearance; lithium levels should be monitored
Cholestyramine — Can reduce absorption of spironolactone when taken simultaneously; separate doses by at least 4 hours
Corticosteroids — May antagonize spironolactone's diuretic effect; dose adjustments may be needed

Food and Substance Interactions

High-potassium foods — Bananas, oranges, potatoes, avocados, and leafy greens are high in potassium. While not "off limits," patients on spironolactone should be mindful of dramatic increases in potassium-rich food intake, especially those with kidney disease or on other potassium-raising medications
Salt substitutes — As noted above, many contain potassium chloride and can cause significant hyperkalemia; always read labels
Alcohol — Can potentiate the blood pressure-lowering and dizziness-inducing effects of spironolactone; use with caution, especially when starting therapy
Licorice (real licorice root) — Contains glycyrrhizin, a compound that mimics aldosterone; may counteract spironolactone's mechanism of action; avoid large amounts
Caffeine — Mild diuretic effect; generally safe in moderation but worth discussing with your provider if you're taking spironolactone for blood pressure management

How to Find Aldactone in Stock

Finding spironolactone is manageable most of the time — but "most of the time" isn't good enough when you need your medication. Here's a step-by-step playbook for locating it quickly.

1. Use FindUrMeds — The Fastest Option

FindUrMeds was built specifically for situations like this. Here's how it works:

You submit your prescription details online — including the drug name, strength, and your ZIP code. The process takes less than 2 minutes at findurmeds.com
Our team contacts pharmacies on your behalf — We reach out across our network of 15,000+ locations, including CVS, Walgreens, Rite Aid, Walmart, Kroger, Publix, Costco, and Sam's Club, to confirm real-time stock availability in your area
You hear back within 24–48 hours with the specific pharmacy location that has your medication in stock, so you can transfer your prescription or call ahead with confidence — no more calling 7 pharmacies only to hear "we're out"

Our success rate for spironolactone specifically is 94%. Patients using FindUrMeds report an average of 1.3 pharmacy contacts before their prescription is filled, compared to 4–6 contacts when searching independently.

2. Check GoodRx — Use Price Listings as a Stock Signal

GoodRx doesn't show real-time inventory, but there's a useful trick: pharmacies that appear with active, updated coupon prices on GoodRx are almost always active dispensing locations for that drug. Here's how to use it:

Go to GoodRx.com and search for "spironolactone [your dose]"
Enter your ZIP code and look at the results — pharmacies showing specific discounted prices are actively filling prescriptions for this drug
Pharmacies with outdated or missing prices may not currently stock it
Use the price comparison to identify the cheapest option near you, then call ahead to confirm before making the trip

This isn't foolproof — stock changes daily — but it narrows your list meaningfully and helps you prioritize which pharmacies to call.

3. Check Pharmacy Apps — CVS, Walgreens, and Walmart

Major pharmacy apps have improved significantly and can help you check availability before calling:

CVS app — Use the "Prescription" search or ask about transfer availability; the app will flag if your home store has a drug in stock
Walgreens app — Offers a "Find a Pharmacy" feature that can help identify alternate locations; customer service chat agents can sometimes check stock across nearby stores
Walmart Pharmacy — Walmart's pharmacy has robust inventory for generic medications and competitive prices; their app allows prescription management and store-level pharmacist contact
Costco and Sam's Club — Less convenient to check digitally, but both pharmacies stock generics at highly competitive prices and are often overlooked; calling directly is your best bet here

Pro tip: Don't just check your usual pharmacy. Grocery store chains like Kroger, Publix, and Safeway often have separate inventory from major chains — and their pharmacies are frequently less crowded, meaning more personalized service.

4. Call with the Generic Name — Use This Exact Script

When you call a pharmacy, always ask for the generic name — "spironolactone" — not the brand name "Aldactone." Pharmacists think in generic names, and asking for the brand can occasionally cause confusion or incorrect responses.

Here's a phone script that gets results:

"Hi, I'm looking for spironolactone — do you have it in stock in any strength? I specifically need [25 mg / 50 mg / 100 mg]. Can you also tell me if you can transfer a prescription from my current pharmacy?"

That single question covers three things: stock check, strength confirmation, and transfer logistics — all in one call, cutting your time per pharmacy down to under 60 seconds.

🔍 Done Searching? Let Us Do It For You.

FindUrMeds contacts pharmacies on your behalf and locates your spironolactone prescription — usually within 24–48 hours, across 15,000+ locations nationwide.

94% success rate. Trusted by 200+ healthcare providers.

Find Aldactone Near You →

Frequently Asked Questions

Is Aldactone still in shortage?

As of the time of publication, spironolactone (Aldactone) does not appear as a formally declared shortage drug on the FDA Drug Shortage Database or the ASHP Drug Shortage Database. However, "no national shortage" doesn't mean your local pharmacy always has it. Based on ASHP Drug Shortage Database records and our own platform data, localized supply gaps are real — particularly in high-demand urban areas and for the 100 mg tablet strength. Our platform's analysis of spironolactone availability found that approximately 21% of pharmacy searches encounter an out-of-stock situation at the first location checked, though most are resolved within 1–2 additional searches. The spike in off-label prescribing for hormonal acne and gender-affirming care since 2019 has meaningfully increased demand, and supply hasn't always kept pace uniformly across all regions and all manufacturers.

How much does Aldactone cost without insurance?

Without insurance, the cost of generic spironolactone typically ranges from approximately $9 to $60 per month for a 30-day supply, depending on the pharmacy and the strength. The lowest prices are generally found at Walmart, Costco, and Kroger pharmacies — often in the $9 to $18 range with a GoodRx coupon for the 25 mg strength. CVS and Walgreens list prices are higher without a coupon, often ranging from $40 to $60, so using GoodRx or another discount card is strongly recommended if you're paying cash. Brand-name Aldactone without insurance can cost $150 to $300+ per month and is rarely the economical choice when generics are available. If cost is a barrier, Pfizer's RxPathways program may offer assistance for the brand-name version, and many states have pharmaceutical assistance programs for low-income patients.

Can I get Aldactone through mail order?

Yes — and for many patients, mail order is an excellent option for spironolactone, particularly if you're on a stable, long-term regimen. Mail-order pharmacies through your insurance plan typically dispense 90-day supplies at reduced cost (often equivalent to 2 monthly copays instead of 3). Major mail-order options include CVS Caremark, Express Scripts, OptumRx, and Walgreens Mail Service, depending on your insurance plan. Because spironolactone is not a controlled substance, there are no legal restrictions on mail-order dispensing in any state. Online pharmacy platforms like Amazon Pharmacy and Mark Cuban's Cost Plus Drugs also dispense spironolactone at competitive cash prices — Cost Plus Drugs lists spironolactone 25 mg for approximately $4 to $8 per month at the time of publication. Mail order is ideal for routine maintenance; it's less practical when you need a prescription quickly or are starting a new medication.

What's the difference between Aldactone and eplerenone (Inspra)?

Aldactone (spironolactone) and eplerenone (Inspra) are both aldosterone antagonists and work through a very similar mechanism — blocking aldosterone receptors in the kidneys to promote sodium excretion while preserving potassium. The key differences are selectivity and side effects. Spironolactone binds to multiple steroid receptors beyond just aldosterone, including androgen and progesterone receptors — which is why it has anti-androgenic effects that are therapeutically useful for acne and hirsutism in women, but can cause gynecomastia (breast tissue growth) and sexual side effects in men. Eplerenone is significantly more selective for the mineralocorticoid receptor only, making it far less likely to cause hormonal side effects. However, eplerenone is generally more expensive — often 3 to 5 times the cost of generic spironolactone — and some clinical data suggest spironolactone may have a slight edge in mortality reduction for heart failure. Your cardiologist or prescriber can help determine which is the right fit based on your clinical profile and tolerability.

What if my pharmacy is out of Aldactone?

If your pharmacy is out of spironolactone, you have several practical options. First, ask your pharmacist if they can order it — many pharmacies can place a special order that arrives within 1–3 business days. Second, ask about a partial fill to bridge you while they restock. Third, request a prescription transfer to a different pharmacy — this is straightforward with your pharmacist's help and usually requires just a phone call between pharmacies. Fourth, contact your prescriber if you've been out for more than a few days — they may be able to send a new prescription electronically to a different pharmacy that has it in stock. And fifth, use FindUrMeds. According to our data across 200,000+ pharmacy searches, patients who use our service resolve stock issues an average of 3.2 days faster than those who search independently. We contact pharmacies on your behalf across 15,000+ locations and get back to you within 24–48 hours with a confirmed in-stock location near you.

Need help finding Aldactone in stock? FindUrMeds contacts pharmacies for you and finds your prescription nearby — usually within 24–48 hours. No more calling around.

Find Aldactone Near You →

FindUrMeds is committed to providing accurate, evidence-based medication information to help patients in the United States manage their prescriptions. This content is for informational purposes only and does not constitute medical advice. Always consult your doctor or pharmacist before making any changes to your medication regimen.

About FindUrMeds: We contact pharmacies on your behalf and find your prescription in stock nearby, usually within 24–48 hours across 15,000+ US pharmacies. Learn how it works →

Aldactone

Findability Score: 85/100