Many users have reported negative effects on the kidneys. However, there is no accurate evidence of this. Perhaps this theory appeared due to the fact that, while using Trenbolone, the urine becomes much darker. But there is an explanation for this: since Trenbolone suffers little to no breakdown, the compound is excreted in the urine in a rusty, oxidised form. Researches tend to demonstrate that kidney damages are actually due to the increased water loss and sweating while using Trenbolone. This is why Trenbolone users are advised to keep high the water intake.
Dutasteride was patented in 1996  and was first described in the scientific literature in 1997.  It was approved by the FDA for the treatment of BPH in November 2001 and was introduced into the . market the following year under the brand name Avodart.  Dutasteride has subsequently been introduced in many other countries as well, including throughout Europe and South America .  The patent protection of dutasteride expired in November 2015 and the drug has since become available in the . in a variety of low-cost generic formulations . 
Anabolic steroid implants are allowed for veterinary use. But if someone diverts this for use in humans, it will be deemed as a distribution of a Schedule III drug leading to prosecution. The law on trenbolone differs in other countries. For instance, in Canada it is a Schedule IV drug. In Canada, all anabolic steroids are classified as Schedule IV drugs. In the UK, anabolic steroids are classified as Class C substances. Their possession can lead to a 2 year jail term, while their production and supply can lead to a 14 year jail term. But many countries do not have strict laws. In some places, you can even buy it over the counter.