Precision Gear Works offer two versions of this drug, one being Tren 150 which is dosed at 150mg/ml and contains the Enanthate ester and Tren-Ace 80 which is dosed at 80mg/ml of the Trenbolone acetate ester. Dosage on the acetate ester ranges from around 40mg every day or 80 every other day right up to 80mg every day or 160mg every other day, some users have reported dosages at 200mg ED and, while I think that is just crazy if you compare the anabolic/androgenic ratio to a powerful hormone such as testosterone you will see why. If you are using the Enanthate base you will be looking at around at around 2ml per week, which would be around 300mg of the drug. I would suggest starting off on the Ace version and seeing how your body responds to Tren, the last thing you want is a long ester at work when you start to develop some really nasty side effects.
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 . 
Heavy consumption of the essential amino acid lysine (as indicated in the treatment of cold sores) has allegedly shown false positives in some and was cited by American shotputter C. J. Hunter as the reason for his positive test, though in 2004 he admitted to a federal grand jury that he had injected nandrolone.  A possible cause of incorrect urine test results is the presence of metabolites from other AAS, though modern urinalysis can usually determine the exact AAS used by analyzing the ratio of the two remaining nandrolone metabolites. As a result of the numerous overturned verdicts, the testing procedure was reviewed by UK Sport . On October 5, 2007, three-time Olympic gold medalist for track and field Marion Jones admitted to use of the drug, and was sentenced to six months in jail for lying to a federal grand jury in 2000.