What is Mibolerone 0.5 (Astera Labs)?
Mibolerone is a veterinary compound taken minutes before a fight or a heavy attempt. It is not a cycle steroid and running it like one is how people get hurt.
Also sold as Cheque Drops, Cheque, Matenon or mibolerone.
Mibolerone was developed to suppress heat in female dogs, which is its actual licensed use. In humans the effect people take it for is acute: a sharp rise in aggression and drive within about half an hour, lasting a couple of hours. It does almost nothing for muscle and it is extremely hepatotoxic, which is why the use pattern is single doses rather than daily ones.
Mibolerone benefits
- Acute aggression and drive within roughly 30 minutes
- Taken before a single event rather than run as a cycle
- No weight gain, so it does not affect a weight class
- 0.5mg tablets, which is a single acute dose
How mibolerone is used
- Acute dose
- 0.5mg, roughly 30 minutes beforehand
- Upper limit
- 1mg, experienced only
- Frequency
- Occasional single doses, not daily
- Duration of effect
- About 2 hours
- Total exposure
- Days across a year, never weeks in a row
This is not a cycle compound and it should never be run as one. Mibolerone is taken as a single dose before a specific event. Daily use for weeks is how the serious liver problems associated with it happen.
If you are looking at this and thinking about a four week run, you are looking at the wrong product.
Package content
- Tablets
- 50 per sachet
- Strength
- 0.5mg mibolerone per tablet
- Mibolerone per sachet
- 25mg
- Original use
- Veterinary, suppression of oestrus in dogs
- Brand
- Astera Labs
One sachet holds 50 single doses, which for correct use is a very long time.
Store below 30°C. Protect from light. Do not freeze. Keep out of reach of children.
Who is Mibolerone for?
Fighters and strength athletes who want an acute effect immediately before a bout or a maximal attempt, and who understand this is a one-off tool rather than something you run.
It is the wrong purchase for anyone wanting to build muscle. It does not do that. If you want strength across a training block, fluoxymesterone is the compound that fills that role, and it is already a harsh one.
Read this before buying. Mibolerone is not something you run for weeks. It is extremely hepatotoxic, more so per milligram than almost anything, and the harm associated with it comes almost entirely from people treating it as a cycle compound rather than a single dose.
The aggression is severe and genuinely difficult to control. It is not the focused intensity people expect; it is unpredictable and it does not stay where you want it. It suppresses your own production hard even from limited use, so
post-cycle therapy may still apply, and
bloodwork is how you check the liver. Not for anyone under 18, and not for women who are pregnant or breastfeeding.
How to use Mibolerone
Swallow one tablet with water roughly 30 minutes before the event. Do not take it daily, do not take it alongside another alkylated oral, and do not drink on it.
Frequently asked questions
Can I run mibolerone as a cycle?
No, and this is the single most important thing on this page. Mibolerone is taken as a single dose before a specific event, not daily for weeks.
Almost all of the serious harm associated with this compound comes from people running it like a normal oral. The liver load per milligram is extreme and it accumulates fast.
Will it build muscle?
Effectively no. Mibolerone does very little for tissue and nobody serious takes it for that.
What it does is produce a sharp acute rise in aggression and drive. That is the only reason it is used, and it is a narrow one.
How long does it take to work?
About half an hour, and the effect lasts roughly two hours. That is why it is timed to an event rather than taken on a schedule.
Taking it earlier in the day and expecting it to be there at competition time does not work.
Why was it made for dogs?
Mibolerone was developed and licensed to suppress heat in female dogs, and that remains its only legitimate use. It was never intended for humans.
That is worth sitting with. The human dosing, safety data and long-term picture for this compound are far thinner than for anything else in this category.
Is the aggression manageable?
Less than people expect. Mibolerone is known for producing aggression that is genuinely hard to direct, which is a problem if there is anyone around you when it hits.
Plenty of people take it once and decide it is not worth repeating. That is a sensible response rather than a failure to handle it.
