Some bodybuilders and athletes use trenbolone esters for their muscle-building and otherwise performance-enhancing effects.  Such use is illegal in the United States and many other countries. The DEA classifies trenbolone and its esters as Schedule III controlled substances under the Controlled Substances Act .  Trenbolone is classified as a Schedule 4 drug in Canada  and a class C drug with no penalty for personal use or possession in the United Kingdom .  Use or possession of steroids without a prescription is a crime in Australia . 
Drostanolone enanthateis an injectable anabolic steroid derived from dihydrotestosterone (DHT). Here, the DHT backbone has been modified with a 2-methyl group to increase its anabolic properties, making this agent significantly more effective at promoting the growth of muscle tissue than its non-methylated parent. Drostanolone enanthate is described in product literature as a “steroid with powerful anabolic and anti-estrogenic properties,” and indeed does seem to share some of both properties. Admittedly, however, its anabolic properties are more properly described as moderate, especially when placed in the context of other agents. The drug is most often used by dieting bodybuilders and athletes in speed sports, where it is highly favored for its ability to produce solid increases in lean muscle mass and strength, which are usually accompanied by reductions in body fat level and minimal side effects.
For physique-or performance-enhancing purposes, this drug is usually injected three times per week. The total weekly dosage is typically 200-400 mg, which is taken for 6-12 weeks. This level of use is sufficient to provide measurable gains in lean muscle mass and enanthate is often combined with other steroids for an enhanced effect. Common stacks include an injectable anabolic such as Deca-Durabolin (nandrolone decanoate) or Boldenon (boldenone undecylenate), which can provide notably enhanced muscle gains without excessive water retention. For mass gains, it is often combined with an injectable testosterone. The result here can be solid muscle gain, with a lower level of water retention and other estrogenic side effects than if these steroids were used alone (usually in higher doses). Masteron, however, is most commonly applied during cutting phases of training. Here it is often combined with other non-aromatizable steroids such as Stanozolol, Primobolan, Trenbolone, or Oxandrolone, which can greatly aid muscle retention and fat loss, during a period which can be very catabolic without steroids.
Most men will dose Masteron (Propionate version) at 300-400mg per week. Because the Enanthate ester is larger than the Propionate ester this means it takes up more space in the total compound. Dosing may need to be adjusted upwards to garner the same amount of active Drostanolone when using the Enanthate version. An increase by 100mg per week should do the trick. Regardless of the dose, the total weekly dose may be split into two equal size injections per week, such as one on Monday and one on Thursday. Total use will last anywhere from 6-12 weeks depending on need.