Dianabol (Methandrostenolone): The Classic Oral, Honestly Explained
Dianabol has been around since 1958 and still has a cult reputation for fast size. That speed comes with a liver, blood pressure and water-retention bill.
SteroidsCanada.org editorial teamUpdated · 3 min read
On this page
Methandrostenolone, also called methandienone, was developed in the 1950s and sold as Dianabol. It was approved in the United States in 1958 for conditions such as muscle wasting and was eventually withdrawn. Its reputation in gyms has never faded, mainly because it works quickly.
What makes it an oral
Most steroids taken by mouth would be broken down by the liver before reaching the bloodstream. Methandrostenolone carries a methyl group at the 17-alpha position, which blocks that breakdown. The same feature is what makes 17-alpha-alkylated steroids hard on the liver.
Old prescribing information listed 2.5 to 5 mg a day. Modern tablets are often 10 to 20 mg each, several times the medical amount per tablet.
Why it works fast
Dianabol raises protein synthesis and pulls glycogen and water into muscle. Strength and scale weight rise within the first few weeks. It also converts into methylestradiol, a potent estrogen, which adds water retention and explains the full, puffy look many users describe. When it stops, part of that weight goes with it.
Risks
| Risk | What it looks like |
|---|---|
| Liver strain | Raised ALT and AST; rarely cholestasis (yellow skin or eyes, dark urine, itching) |
| Blood pressure | Fluid retention raises readings, sometimes sharply |
| Cholesterol | HDL drops quickly with oral steroids |
| Estrogen effects | Breast tenderness or growth, puffiness |
| Suppression | Natural testosterone falls within days |
Why runs are kept short
Liver and cholesterol effects build with time on 17-alpha-alkylated orals. That is why oral compounds are generally used for a few weeks rather than months, and why stacking two orals multiplies the strain rather than the benefit.
Where Dianabol came from
Methandrostenolone was synthesised in the 1950s by Ciba and became famous after a United States team physician, John Ziegler, introduced it to weightlifters. It quickly spread through strength sports. In medicine it was used for muscle wasting and to help patients recover after illness. The American product was withdrawn in the 1980s, and it has never been marketed as a medicine in Canada. Today it is made by manufacturers around the world, often in tablets several times stronger than the original 5 mg pill.
Who should not take it
- Anyone with liver disease, raised liver enzymes or heavy alcohol use
- People with high blood pressure, heart disease or kidney disease
- Anyone with low HDL or a family history of early heart disease
- Men who are prone to breast tissue growth
- Women, men trying to conceive, and anyone under 21
Medicines and substances that add risk
Alcohol, high doses of acetaminophen (Tylenol), some antifungal and tuberculosis medicines, and other oral steroids all add to the strain on the liver. Methandrostenolone can also increase the effect of warfarin and lower blood sugar in people on diabetes medicines.
Blood pressure, practically
Water retention from Dianabol can raise blood pressure within days. A validated upper-arm home monitor costs about the same as a month of supplements and is the most useful tool you can own. Measure seated, after five minutes of rest, at the same time each day. Readings that stay above 140/90, or any reading of 180/120 or higher, are a reason to stop and see a doctor.
Myths and facts
| Myth | Fact |
|---|---|
| The gains are all muscle | A large share of early weight is water and glycogen that leaves after stopping. |
| Liver supplements cancel the toxicity | No supplement has been proven to prevent 17-alpha-alkylated steroid liver injury. |
| Taking it once a day is fine | Its short half-life means levels swing widely; the bigger question is total amount and duration. |
Bloodwork
Liver enzymes (ALT, AST, GGT, bilirubin), lipid panel, blood pressure, estradiol and total testosterone before starting and within a few weeks of starting.
Legal status
Methandrostenolone is Schedule IV under the Controlled Drugs and Substances Act. Possession for personal use is not an offence under the Act; selling, importing and exporting without authorisation are. It is not marketed as a medicine in Canada and is banned in sport.
Product pages: Zionova Dianabol and Genetix Pharma Dianabol. For a side-by-side with oxymetholone, see Anadrol vs Dianabol.
Products in this guide
Each product page carries the chemistry, label strength, risks and references.
Questions
Why does Dianabol cause so much water retention?
It converts to a potent estrogen, methylestradiol, and pulls glycogen and water into muscle. Much of the early weight is fluid and fades after stopping.
How long does Dianabol last in the body?
Its half-life is only a few hours, which is why it is taken several times a day.
Was Dianabol ever a prescription drug?
Yes. It was approved in the United States in 1958 and later withdrawn. Old labels listed 2.5 to 5 mg a day.
Is milk thistle enough to protect the liver?
No supplement is proven to prevent liver injury from 17-alpha-alkylated steroids. Keeping runs short and checking liver enzymes matter far more.
Sources
General information, not medical advice. Written for adults in Canada. Anabolic steroids are Schedule IV under the Controlled Drugs and Substances Act. Talk to a licensed healthcare provider and get bloodwork before using any compound.
Keep reading
Compound guides · 3 minMasteron (Drostanolone): Enanthate and Propionate ExplainedDrostanolone began as a breast cancer treatment. It is now known for a hard, dry look in lean people. Here is what it does and what it costs your scalp and cholesterol.
Compound guides · 3 minTestosterone Propionate: The Short Ester ExplainedPropionate was the first injectable testosterone ester used in medicine. It works the same way as enanthate but on a much faster clock, which changes how it is used and how it feels.
Compound guides · 3 minBioavailability: How Your Body Absorbs and Uses Oral SteroidsA 20 mg tablet does not put 20 mg into your blood. Here is what happens between swallowing and reaching muscle, in plain language.