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Halotestin (Fluoxymesterone)

Halotestin (often referred to as Halo) is an oral anabolic steroid derived from methyltestosterone. This incredibly potent anabolic steroid has an androgenic rating of 850 and an anabolic rating of 1900. Halotestin is considered the most potent steroid available, even stronger than Trenbolone, which many believe is the strongest ever.

Released in the 1950’s by Upjohn Pharmaceuticals. Halotestin was created for medical reasons, to help build and maintain lean muscle mass for patients suffering from many different medical conditions.


Halotestin (Fluoxymesterone)
Chemical Name: 9a-fluoro-11b, 17b-dihydroxy-17a-methyl-4-androsten-3-one, 9a-fluoro-11b-hydroxy-17a-methyltestosterone
Formula: C20H29FO3
Molecular Weight: 336.441 g/mol
Manufacturer: Upjohn
Half Life: 9.5 hours
Anabolic/Androgenic Rating: 1900/850

Halotestin has an added methyl group on the 17th carbon, and this allows Halotestin to be orally ingested without being destroyed by the liver. This modification significantly increases the hepatotoxicity of the steroid, which can lead to liver damage with extended periods of use.

There is also a modification to carbon 9, 3 and 11. Due to these modifications, Halotestin does not aromatize and has a very high androgenic rating. Not being able to aromatize, makes Halotestin very effective when incorporated into a cutting cycle. Its high androgenic rating makes Halotestin very popular for powerlifters and strength athletes. This steroid is known to give incredible strength gains over a short period.

Halotestin is a potent anabolic steroid. However, due to its extreme liver toxicity and the severe side effects associated with this steroid, it is often avoided by most bodybuilders. There is really no need to use Halotestin; there are other effective steroids available (such as Masteron) that are not as harsh as Halotestin. You can view side effects associated with steroids here.

Dosage and Cycles

Halotestin dosages range from 10 to 30mg a day for 3 to 4 weeks. 10 to 20mg is often more than enough to see incredible results, dosages higher than this are not recommended. Halotestin should never be taken longer than four weeks due to its liver toxicity and harsh effects on the body.

Halotestin is often used with steroids like testosterone and Equipoise when doing a cutting cycle. Oral steroids such as Dianabol, Winstrol, etc. and harsh steroids like Trenbolone should be avoided entirely when using Halo.

Sample cycle:

 HalotestinTestosterone PropionateNolvadex (*if needed)
Week 110mg/day150mg/every second day*20mg/every day
Week 220mg/day150mg/every second day*20mg/every day
Week 320mg/day150mg/every second day*20mg/every day
Week 4150mg/every second day*20mg/every day
Week 5150mg/every second day*20mg/every day
Week 6150mg/every second day*20mg/every day
Week 7150mg/every second day*20mg/every day
Week 8150mg/every second day*20mg/every day

Once the cycle is complete, make sure to follow a proper PCT protocol. The above cycle is for entertainment purposes only and is not medical advise.


With over 15 years of experience as a personal trainer, and a vast amount of knowledge on bodybuilding and anabolic steroids. My aim is to provide quality and helpful information.

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