What is Oxymetholone 25 (Astera Labs)?
Astera Labs oxymetholone in 25mg tablets, 100 to a sachet. Oral Anadrol at the strength that lets you find out how you react before committing to a full dose.
Also sold as Anadrol, Adrol, A50, Anapolon or oxymetholone.
Oxymetholone puts on weight faster than anything else available, through a combination of real tissue, glycogen and a great deal of water. It is 17-alpha-alkylated, and it behaves strangely with estrogen in a way that catches out people who think they have it covered.
Oxymetholone 25 benefits
- The fastest weight and strength gain of any oral compound
- Noticeable inside the first week, which is why it opens bulking cycles
- Strong effect on fullness and pump when calories are high
- Also used at the end of a cycle as a finisher, to close out a phase before post-cycle therapy
- 25mg tablets allow a trial week at half dose, which a 50mg tablet does not
Oxymetholone 25 dosage
- First week
- 25mg per day, as a tolerance trial
- Standard
- 50mg per day, which is two tablets
- Higher end
- 100mg per day, experienced only
- Frequency
- Once daily, or split at the higher dose
- Half-life
- About 8 to 9 hours
- Cycle length
- 4 to 6 weeks maximum
The 25mg strength is what makes a trial week practical. Oxymetholone affects blood pressure and appetite unpredictably, and finding that out at half dose is cheaper than finding it out at full.
50mg a day is where most people should settle. Four to six weeks is the ceiling and the liver sets it.
Package content
- Tablets
- 100 per sachet
- Strength
- 25mg oxymetholone per tablet
- Oxymetholone per sachet
- 2500mg
- Half-life
- About 8 to 9 hours
- Brand
- Astera Labs
At 50mg a day one sachet covers 50 days, well beyond what a single run should be.
Store below 30°C. Protect from light. Do not freeze. Keep out of reach of children.
Who is Oxymetholone 25 for?
Anyone running oxymetholone for the first time, and anyone who wants to sit between 25 and 75mg rather than at fixed 50mg steps.
ANADROMED 50 is the same compound at 50mg, where one tablet is the standard dose. There is also an injectable version, which is no easier on the liver.
Before you run it. The liver is what limits every compound on this page. The 17-alpha-alkyl group is what lets the tablet survive digestion and reach your bloodstream intact, and it is the same feature that puts the liver under load. Cycle length is set by that, not by how well you tolerate it. Four to six weeks is the ceiling for oxymetholone. The part that catches people out is estrogen:
it does not aromatise, yet it still causes gyno and water retention, so an aromatase inhibitor does nothing about it and a SERM is what addresses that side. The
estrogen management guide explains the difference. Blood pressure climbs sharply on this compound and is worth measuring at home rather than guessing at.
Post-cycle therapy is required. Keep alcohol low for the duration and do not run a second alkylated oral alongside it.
Bloodwork before and after is how you know where you stand. Not for anyone under 18, and not for women who are pregnant or breastfeeding.
How to use Oxymetholone 25
Swallow with water. Two tablets daily is the standard protocol; split them if you are running 100mg. Take them at the same time each day.
Frequently asked questions
Will an aromatase inhibitor stop gyno from Anadrol?
No, and almost everyone gets this wrong. Oxymetholone does not aromatise at all, so there is no estrogen for an aromatase inhibitor to act on, and yet gyno and water retention still happen.
The mechanism is different and a SERM is what addresses it. Running an AI and assuming you are covered is exactly how people end up with gyno on this compound while believing they did everything right.
Why does it raise blood pressure so much?
The water retention is the main driver and oxymetholone produces more of it than almost anything else. Combined with what it does to cholesterol, blood pressure often climbs quickly and noticeably.
A home monitor is worth having on this compound specifically. It is the side effect most likely to end a cycle early and the easiest one to actually measure.
Does it really kill your appetite?
For a fair number of people, yes, which is an awkward side effect on a compound used to gain weight. It is not universal and plenty of people report the opposite.
If it happens to you, liquid calories are the usual workaround. If eating becomes genuinely difficult, the compound is working against the thing you are running it for.
Would the injectable version be easier on my liver?
No. The liver load comes from the 17-alpha-alkyl modification built into the molecule, not from the route it takes to get into you.
Injecting bypasses the stomach, not the liver. It is the same compound, the same cycle length and the same monitoring either way. The only real difference is convenience and whether your stomach objects to tablets.
How long should I run it?
Four to six weeks. The liver sets the ceiling.
Like Dianabol, it is a kickstart rather than a full cycle. Run it at the front, drop it, and let the injectables carry the rest of the run.
