Health Minister Lesley Griffiths says she does not consider mephedrone use 'a huge problem' in Wales.
But she added that educating people about it now will raise awareness of the dangers and help prevent people trying the substance in future.
More top news
The Royal London One-Day Cup match being played in Cardiff has been abandoned due to a 'dangerous pitch'.
A series of crashes on the A470 have led to traffic disruption
A largely dry and warm afternoon, but a muggy night to come with showery outbreaks.