Dr James McDaid says the banning of headshops is not the way forward.
He said he believes the country is on the verge of making a huge mistake if such shops are banned.
Deputy McDaid, who is also a GP, says it isn't the way to tackle drug problems.
He says doing so will not solve anything.
"I do not think - and I know this is a controversial sentence - that the banning of these substances and the banning of these headshops is the proper way forward" he said.
"There are plenty of information and statistics that are there to prove the point that I'm making" he added.