Mohammed Jawad lost 10 percent of his body weight and told doctors he was urinating blood after guards subjected him to the sleep deprivation program, Air Force Maj. David Frakt, his Pentagon-appointed lawyer, said, citing records from the prison on a U.S. base in Cuba.
The records, Frakt said, contradict military claims that Jawad suffered no ill effects from what the military called its "frequent flyer" sleep deprivation program.
"It provides substantiation there was not just mental suffering but there were medical side effects," Frakt told The Associated Press.
Jawad is charged with attempted murder for throwing a grenade that wounded two U.S. soldiers and their translator in Afghanistan in December 2002.
The lawyer had previously filed a motion asking a military judge to dismiss the charges because of the treatment, which he has labeled torture.
On Friday, he said he filed an additional motion for dismissal because prosecutors failed to provide records of the health effects before a hearing on the issue last month.
U.S. military prosecutors have acknowledged that guards kept Jawad awake by repeatedly moving him from cell to cell over two weeks in May 2004 but say the treatment did not amount to torture and they have urged the judge not to dismiss the charges.
A Pentagon spokesman, Navy Cmdr. Jeffrey Gordon, declined Friday to comment on Frakt's allegations, which are based on records from the prison.
In a separate motion, Frakt argues for a dismissal on the grounds that a senior Pentagon legal official may have misled the court in his testimony last month.
The lawyer said Air Force Brig. Gen. Thomas Hartmann was deliberately evasive when testifying on a hearing called to determine whether he had used what the military calls improper "command influence" to push for criminal charges to be filed against Jawad. A ruling is pending on the issue.
A spokesman for the general said Hartmann stands by his testimony and declined further comment.
Jawad is one of 20 Guantanamo prisoners so far charged. The military says it plans to prosecute about 80 of the 265 men held at the prison.