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"&lt;p&gt;&lt;/p&gt;&lt;p&gt;Saturday night's Ultimate Fighter 7 Finale was unexpectedly pared from 11 down to 10 bouts at the last minute when Tim Credeur was not allowed to fight. He was scheduled to face Cale Yarbrough at The Palms in Las Vegas.&lt;/p&gt;&lt;p&gt;The fight was scrapped by the Nevada State Athletic Commission when traces of the prescription drug Adderall were found in a pre-fight drug test administered to Credeur according to the Ultimate Fighting Championship.&lt;/p&gt;&lt;p&gt;Credeur informed that commission before Friday's weigh-ins that he had been taking the drug up until about five days ago. He was voluntarily subjected to a drug test following the weigh-ins and traces of the drug appeared in his system.&lt;/p&gt;&lt;p&gt;\"Unfortunately, the drug was still in his system and he's still positive, so he was unable to get cleared to fight,\" said Keith Kizer, Executive Director of the Nevada State Athletic Commission to UFC.com. \"It should be out of his system in a few days and hopefully they'll find another fight for him.\"&lt;/p&gt;&lt;p&gt;According to Kizer, Adderall \"acts as a cardio-vascular restrictor and that's the main reason it's banned because it can cause athletes to have a cardiac episode with the stress they're under when they're in an athletic competition. Secondly, it can have a performance-enhancing effect as well.\"&lt;/p&gt;&lt;p&gt;There will be no disciplinary action taken towards Credeur by the NSAC. \"We found out about it beforehand, and he was very honest with us about it yesterday,\" said Kizer.&lt;/p&gt;&lt;p&gt;According to drugs.com, \"Adderall is a central nervous system stimulant. It affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control.&lt;/p&gt;&lt;p&gt;\"Adderall is used to treat narcolepsy and attention deficit hyperactivity disorder (ADHD).\"&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/mma/2008/06/23/credeur-cancelled>