In November 1942, the Italian cyclist Fausto Coppi took "seven packets of amphetamine" to beat the world hour record on the track.  In 1960, the Danish rider Knud Enemark Jensen collapsed during the 100 km team time trial at the Olympic Games in Rome and died later in hospital. The autopsy showed he had taken amphetamine and another drug, Ronicol , which dilates the blood vessels. The chairman of the Dutch cycling federation, Piet van Dijk, said of Rome that "dope – whole cartloads – [were] used in such royal quantities." 
When you use any kind of steroid or testosterone over the course of three weeks or longer, your body stops making natural testosterone. Because of this, you need to make sure to implement PCT in order to help your body start producing natural testosterone again. You will need to start your therapy 10 days after your last dose of Sustanon 250, and all you need is a SERM, or Selective Estrogen Receptor Modulator. Nolvadex is generally regarded as one of the best, and you will use 40mg per day for the first two weeks, 20mg per day for the next two weeks, and then 10mg a day for one more week. You can continue it for a sixth week if necessary.