Disgraced former American cyclist Tyler Hamilton says he was given performance-enhancing drugs as well as blood transfusions by Spanish doctor Eufemiano Fuentes.
Fuentes is the principal accused in the "Operacion Puerto" trial examining whether the blood transfusions he carried out on a number of high-profile cyclists endangered public health.
Hamilton, though, claims he not only received numerous blood transfusions from Fuentes but was also provided with the blood-booster EPO, testosterone, insulin and human growth hormone (HGH).
"I was a patient of Doctor Fuentes from 2002 to 2004," he told the court on Tuesday.
"In our first meeting we planned transfusions and medical treatments for the future.
"He gave me a calendar with the races and with the dates that I should take the substances and he gave me EPO.
"The calendar was circled with when I should take the EPO and the colour of the circle indicated the amount.
"The consumption of HGH, testosterone and insulin were also indicated on the calendar.
"I didn't follow the instructions on HGH very much and I only took insulin one time because I didn't like how I felt when I took it. I sweated a lot and my heart rate increased."
The American, who twice tested positive during his career in 2004 and 2009, also claims to have felt ill after receiving a blood transfusion in 2004.
"Within 35 or 40 minutes of the transfusion I went to the bathroom and my urine was black," Hamilton said.
He said he ended his relationship with Fuentes just months after that experience when he tested positive in the 2004 Tour of Spain due to traces of someone else's blood being found in his system.
Hamilton also confirmed he had received blood transfusions from other people, including one from former Spanish cyclist Alberto Leon, who had no medical training, during the 2002 Tour de France.
Fuentes denies the charge of endangering public health.
Meanwhile, the lawyer for former Tour de France winner Alberto Contador said his client would not testify at the trial in defence of Manolo Sainz, his former manager at the Liberty Seguros cycling team.
Sainz is on trial along with four others, including Fuentes.
"Looking at how the process is developing, I will not call Alberto Contador as a witness," Ignacio Arroyo told reporters.
Contador was due to testify on Friday, but Arroyo claimed his decision not to call the Spaniard was a sign that the case was going well for his client.
"Looking at how things are developing every day during the case, I believe that certain things are on the right path with respect to my client."
On Monday, the court heard that the doping substance Synacthen found in Sainz' residence when he was arrested along with Fuentes in 2006 was, in fact, given to the team by the Spanish Medical Agency.
Judge Julia Patricia Santamaria made little secret of her unease when Arroyo made his announcement right at the end of Tuesday's hearing.
"Alright, that is your right, although a lot of work had gone into that testimony," she said.
No other parties had requested the cyclist's presence, so Contador is simply no longer involved in proceedings.
In another twist in the trial, though, the judge confirmed that another cyclist due to testify on Friday, Angel Vicioso, could not be located.