HomeCompoundsAnadrol
17α-alkylated oral anabolic steroidRx · Schedule III

Anadrol.

Also known as: Oxymetholone · A-bombs · A50

Why anadrol is the fastest-acting, hepatotoxicity, estrogenic side effects, and dosing.

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Researched and edited by the Epti editorial team
Every claim labeled by confidence tier · reviewed quarterly · last updated May 20, 2026
01 · Quick Overview

Quick Overview.

Anadrol (chemical name: Oxymetholone), often referred to as "A-Bombs" or "Abombs," is widely considered the most powerful and most toxic oral anabolic steroid in existence. Originally developed in 1959 to treat severe anemia and muscle wasting diseases, it is still FDA-approved today, though its medical use has largely been replaced by safer alternatives.[1]

In the bodybuilding and powerlifting communities, Anadrol is used for one specific purpose: adding massive amounts of sheer size and explosive strength in the shortest time possible. It is notorious for causing extreme water retention, severe liver toxicity, and massive spikes in blood pressure. The gains are rapid and dramatic, but they are almost entirely water and glycogen, making them very difficult to keep post-cycle.[2]

  • Primary Use Case: Extreme off-season bulking, rapid strength gains, and powerlifting peaking.
  • Mechanism: Agonism of the androgen receptor, massive stimulation of erythropoiesis (red blood cell production), and direct activation of the estrogen receptor.[3]
  • Who it is for: Elite powerlifters peaking for a meet, or advanced mass-monsters who can tolerate extreme side effects.
  • Who it is NOT for: Beginners, women, or anyone concerned about their liver, blood pressure, or cardiovascular health.
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02 · The Protocol & Usage Guide

The Protocol & Usage Guide.

confidence_tier: well-established

Anadrol is a 17-alpha-alkylated (17aa) oral steroid. It has a half-life of approximately 8 to 9 hours. Because it is so powerful and toxic, the standard tablet size is massive (50mg), whereas most other oral steroids are dosed in 5mg or 10mg tablets.[4]

Standard Dosing Schedule

PhaseDoseFrequencyTiming
BeginnerNOT RECOMMENDEDN/AToo toxic for beginners.
Standard Bulking50 mg / daySingle or split doseWith meals
Advanced Mass/Power100 mg / daySplit into 2 dosesAM and Pre-Workout
Elite Powerlifting Peak150 mg / daySplit into 3 dosesShort term only (1-2 weeks)

Cycle Length & Discontinuation Protocol

  • Cycle Length: Strictly 4 to 6 weeks. Running Anadrol longer than 6 weeks is highly dangerous to the liver and cardiovascular system.
  • The "Kickstart" Method: Like Dianabol, Anadrol is often used for the first 4 weeks of a heavy injectable cycle to provide immediate mass while waiting for long esters to kick in.
  • Discontinuation (PCT): Anadrol is highly suppressive. A standard PCT is required if not cruising on TRT. Expect a massive and rapid loss of water weight (often 10+ lbs) immediately after stopping the drug.
04 · Safety, Interactions & Side Effect Management

Safety, Interactions & Side Effect Management.

confidence_tier: well-established

Side Effect Profile

Side EffectSeverityFrequencyManagement
HepatotoxicityExtremeUniversalElevates AST/ALT significantly. Can cause peliosis hepatis (blood-filled cysts in the liver). Avoid alcohol completely.
HypertensionExtremeUniversalThe rapid increase in blood volume and red blood cells strains the heart. Monitor BP daily.
GynecomastiaSevereCommonAnadrol does not aromatize, but it directly activates the estrogen receptor. Manage with Nolvadex, not Arimidex.
Lethargy / "Tox-Sick"SevereCommonThe extreme liver stress often makes users feel exhausted, nauseous, and lose their appetite.
"Pumps" / CrampsSevereCommonLower back pumps can become debilitating. Manage with Taurine and hydration.

Contraindications

  • Absolute: Individuals with pre-existing liver disease, high blood pressure, or cardiovascular disease.
  • Absolute: Women. The virilization is rapid and severe.
  • Absolute: Beginners.
05 · Common Stacks & Combinations

Common Stacks & Combinations.

confidence_tier: community

StackGoalRationale
Testosterone + Deca + AnadrolThe Ultimate Mass StackThe heaviest bulking stack possible. Test and Deca provide the base; Anadrol provides explosive, immediate size.
Testosterone + Trenbolone + AnadrolPowerlifting PeakUsed by elite strength athletes in the final weeks before a meet. Extremely toxic, but produces unparalleled strength and aggression.
06 · Body Composition & Training Guide

Body Composition & Training Guide.

confidence_tier: well-established

  • The "Anadrol Look": Anadrol produces the thickest, most watery, and most bloated physique of any steroid. It is the exact opposite of a cosmetic or aesthetic drug.
  • Explosive Strength: The strength gains are unparalleled. The massive intracellular water retention acts as a cushion for the joints, allowing users to move incredible amounts of weight safely.
  • The Appetite Paradox: While Anadrol is used for bulking, it is so toxic to the liver that it frequently causes severe nausea and loss of appetite. Many users have to force-feed themselves to get enough calories while on the drug.
07 · Storage, Handling & Accessibility

Storage, Handling & Accessibility.

confidence_tier: well-established

  • Storage: Store tablets at room temperature in a dry place.
  • WADA Status: Banned in competitive sports under section S1.1 (Anabolic Androgenic Steroids).
  • Cost & Accessibility: Widely available on the black market. It is relatively cheap to produce.
08 · Bloodwork Monitoring Guide

Bloodwork Monitoring Guide.

confidence_tier: well-established

BiomarkerWhen to TestWhy it Matters
AST / ALT (Liver)Baseline, Mid-CycleAnadrol is extremely toxic to the liver. If enzymes exceed 3x the upper limit of normal, discontinue use immediately.
Complete Blood Count (CBC)Baseline, Mid-CycleAnadrol was designed to treat anemia; it will massively spike red blood cell count and hematocrit.
Blood PressureDailyMust be monitored daily at home. Hypertension is the primary acute danger of Anadrol.
09 · Comparison to Similar Compounds

Comparison to Similar Compounds.

confidence_tier: well-established

FeatureAnadrol (Oxymetholone)Dianabol (Methandienone)Superdrol
Primary GoalExtreme Mass / PowerMass / StrengthDry Mass / Strength
Water RetentionExtremeHighNone
Liver ToxicityExtremeHighExtreme
Estrogen MechanismDirect ER ActivationAromatizes to Methyl-E2None
Mood EffectLethargy / NauseaEuphoria / Well-beingLethargy
10 · Deep Dive (For Advanced Researchers)

Deep Dive (For Advanced Researchers).

confidence_tier: well-established

The Estrogen Paradox

One of the most confusing aspects of Anadrol pharmacology is its estrogenic activity. Oxymetholone is a DHT derivative. By definition, DHT derivatives cannot be aromatized by the aromatase enzyme into estrogen. Therefore, taking an Aromatase Inhibitor (AI) like Arimidex or Aromasin will do absolutely nothing to stop Anadrol-induced gynecomastia or water retention.

  • The Mechanism: Research indicates that Oxymetholone and its metabolites can directly bind to and activate the estrogen receptor (ER) without needing to be converted into an estrogenic hormone first.
  • The Solution: Because AIs are useless, the only way to combat Anadrol-induced gynecomastia is to use a Selective Estrogen Receptor Modulator (SERM) like Nolvadex (Tamoxifen), which physically blocks the estrogen receptor in breast tissue.[5][6]

Hepatotoxicity and Peliosis Hepatis

Anadrol is 17-alpha-alkylated, but it is dosed much higher (50-100mg) than other 17aa steroids (like Winstrol at 30-50mg). This places an immense metabolic burden on the liver.

  • Peliosis Hepatis: A rare but highly dangerous condition uniquely associated with long-term Anadrol use in clinical settings. It involves the formation of blood-filled cysts within the liver parenchyma. If these cysts rupture, it can lead to fatal intra-abdominal hemorrhage. This is why Anadrol cycles must be kept extremely short.[7][8]

Erythropoiesis

Anadrol was originally developed to treat aplastic anemia. It is one of the most potent stimulators of erythropoietin (EPO) release from the kidneys ever created. While this drastically improves oxygen transport (which is why strength goes up), it also causes the blood to become highly viscous (thick). This polycythemia forces the heart to pump much harder, leading to the severe hypertension associated with the drug.[9]

11 · Frequently Asked Questions (FAQ)

Frequently Asked Questions (FAQ).

confidence_tier: community

Q: Why do I feel so sick on Anadrol? A: This is known as "tox-sick." The extreme stress placed on your liver causes systemic inflammation, nausea, and lethargy. If you cannot eat because you feel so sick, the drug is defeating its own purpose (bulking).

Q: Can I use Arimidex to stop Anadrol gyno? A: No. Anadrol does not aromatize. Arimidex will do nothing. You must use a SERM like Nolvadex to block the receptor directly.

Q: Is Anadrol stronger than Dianabol? A: Yes. Milligram for milligram, Anadrol produces more sheer weight and strength than Dianabol, but it is also significantly more toxic and produces a much "dirtier," more bloated look.

12 · International Regulatory Status

International Regulatory Status.

confidence_tier: well-established

AgencyStatusNotes
US FDAApprovedSchedule III Controlled Substance. Prescribed for anemias caused by deficient red cell production.
WADABannedProhibited at all times under S1.1.
UK MHRAApprovedClass C Controlled Drug. Legal to possess for personal use.
EU EMAApprovedPrescription required.
13 · Decision Tree

Decision Tree.

confidence_tier: community

[Goal: Extreme Mass and Powerlifting Strength?]
  |
  +-- Are you a beginner or intermediate lifter?
        |
        +-- (Yes) -> DO NOT USE ANADROL. Use Dianabol or Testosterone alone.
        |
        +-- (No) -> Are you prepared for severe liver stress and high blood pressure?
              |
              +-- (No) -> Do not use Anadrol.
              |
              +-- (Yes) -> Take 50-100mg daily for a maximum of 4-6 weeks.
                           Have Nolvadex on hand for gyno flare-ups.
                           Take TUDCA daily.
                           Monitor blood pressure daily.
14 · Schema.org Data

Schema.org Data.

{
  "@context": "https://schema.org",
  "@type": "MedicalEntity",
  "name": "Oxymetholone",
  "alternateName": ["Anadrol", "Anapolon", "A-Bombs"],
  "description": "An extremely potent and highly toxic oral anabolic steroid. FDA-approved for treating anemia. Used off-label by advanced bodybuilders and powerlifters for massive, rapid increases in strength and body weight.",
  "legalStatus": {
    "@type": "DrugLegalStatus",
    "description": "FDA Approved. Schedule III Controlled Substance in the US. Banned by WADA."
  }
}
15 · References

What we cited.

  1. Kicman AT. Pharmacology of anabolic steroids. Br J Pharmacol. 2008;154(3):502-521. doi:10.1038/bjp.2008.165
  2. Llewellyn W. Anabolics. 11th ed. Molecular Nutrition; 2017.
  3. Supasyndh O, et al. Effect of oral anabolic steroid on muscle strength and muscle growth in hemodialysis patients. Clin J Am Soc Nephrol. 2013;8(2):271-279. doi:10.2215/CJN.00380112
  4. Hengge UR, et al. Double-blind, randomized, placebo-controlled phase III trial of oxymetholone for the treatment of HIV wasting. AIDS. 2003;17(6):699-710. doi:10.1097/00002030-200304110-00008
  5. Bond P, et al. Anabolic-androgenic steroids: How do they work and what are the risks? Front Endocrinol (Lausanne). 2022;13:1059473. doi:10.3389/fendo.2022.1059473
  6. Clark RV, et al. Endocrinology of the aging male. Endocrinol Metab Clin North Am. 2013;42(2):295-313. doi:10.1016/j.ecl.2013.02.005
  7. Young GP, et al. Fatal hepatic coma complicating oxymetholone therapy in multiple myeloma. Aust N Z J Med. 1977;7(1):47-51. doi:10.1111/j.1445-5994.1977.tb03656.x
  8. Kafrouni MI, et al. Hepatotoxicity associated with dietary supplements containing anabolic steroids. Clin Gastroenterol Hepatol. 2007;5(7):809-812. doi:10.1016/j.cgh.2007.04.020
  9. Orr R, et al. The anabolic androgenic steroid oxandrolone in the treatment of wasting and catabolic disorders: review of efficacy and safety. Drugs. 2004;64(7):725-750. doi:10.2165/00003495-200464070-00004

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