If you need a large amount of controlled medicine, you will find that most doctors will balk at the idea of issuing prescriptions for more than one hundred tablets; even then they may write two different prescriptions for fifty tablets each and tell you to purchase the other prescription at a different pharmacy. Be sure to ask the doctor to telephone the pharmacy and confirm the fact that they do have the medicine on the shelf. It can be frustrating to go through the trouble of finding a doctor and paying him (commonly, twenty dollars) to write a prescription, only to find that the pharmacy is out of stock.
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."