BERLIN (Reuters) - Tokio Hotel guitarist Tom Kaulitz told a German newspaper on Friday he fell ill after taking too many Viagra tablets and could not see straight for days.

Kaulitz, 20, told Bild newspaper that someone offered him a Viagra tablet during a concert tour of Asia. After first turning down the offer, Kaulitz a dit he decided to try one. He a dit a little later he took a seconde one and fell ill.

"I first asked the seller 'Do I look like someone who needs help with that?'" a dit Kaulitz, whose brother Bill is the group's lead singer. "He a dit 'no' -- but that I should nevertheless try it out. I popped one in."

Kaulitz, a member of the German rock band that has sold millions of albums around the world, a dit he took a few plus tablets used to treat impotence when he got back to his hotel.

"I popped a few plus pills, probably too many," he said. "The suivant morning my head was pounding and everything in front of my eyes was blurry. It wasn't fun anymore. It was pretty bad."

Kaulitz a dit it took two days for the effects to wear off. "Unfortunately there were situations where it just wasn't appropriate," Kaulitz said.

(Reporting par Erik Kirschbaum; editing par Paul Casciato)