كتب : Omar AbdelAziz
The Bayern skipper along with Brazilian defender Lucio, have been charged by UEFA last week for violent conduct and will be summoned to a hearing by the UEFA control and disciplinary body on Thursday.
Kahn issued an apology and explained the reasons of his fury in an interview with the club's official site on Wednesday.
"I'd expressly like to apologize to the doctor. It wasn't OK, and it won't happen again, that's a promise," said Kahn.
The Germany international regretted his behavior but revealed the reasons for his fury.
"It was the fourth time in a row we'd had a doping control after a match - and would you believe it, I was picked out of 18 possible candidates for the fourth time," he added.
"I was disgruntled, especially because my family was waiting and I'd promised to hurry up after the final whistle this time."
"The team was celebrating the win and there I was in the medical room, watching the clock, and then finally, after two hours I managed it. I took my container to the doctor, but he said he hadn't been watching me. I had to do it all again."
"I was angry, but the way I let my frustration get the better of me wasn't right. I'm very sorry."
The Bavarian giants were given a boost by the news that Dutch midfielder Mark van Bommel will be available for the Champions League quarter finals second leg against AC Milan after his two-match suspension was reduced by UEFA to one match.
The Dutchman has been given a suspended one-match ban by UEFA for his offensive gestures to Real Madrid fans in the last 16 first leg.
He was then sent off in the return match for a second yellow card that would normally enforce a one-match ban.
UEFA decided to impose a deferred sanction by extending the suspension to two games, but the German Champions' appeal to the case has turned successful, the club announced in a statement on Wednesday.
Bayern will visit Milan for the first leg on April 3rd, and the return game will be in Munich on April 11th.