A campaign has been launched today to highlight the dangers of using the banned substance mephedrone.
It is estimated that more than 134,000 youngsters aged 16 to 24 have tried the formerly legal high, commonly known as 'meow meow'.
Cardiff bar manager Sian Hills told ITV Wales people that people often underestimate the power of the drug.
More top news
A young boy has been praised for his quick-thinking actions after his mother collapsed at home.
George North has ended speculation over his future by signing a new contract at Northampton.
A man who died from stab wounds in Newport has been named by police.