Rocker Dave Grohl has sworn off drugs for a second time after suffering a relapse 25 years after he got clean.

The Foo Fighters frontman stopped taking illegal substances at the age of 20, but a bout of insomnia drove him back to smoking marijuana.

Grohl admits he would puff on a joint after putting his daughters to bed, but swore off cannabis again when he found himself watching reality Tv show Keeping Up With The Kardashians while he was high.

He tells Britain's The Sun newspaper, "I stopped doing drugs when I was about 20 years old. But I recently thought, 'Oh, I'm going to start smoking pot again to cure insomnia.' I'd put the kids to bed, go upstairs and smoke a little bit of pot. But then I'd get stuck in front of the Kardashians on Tv for 45 minutes. And it freaked me out. I was like, 'I'm never doing this ever again.' It's definitely not for me."