The Drug Foundation of New Zealand is concerned over the manufacturing of synthetic drugs at an increased rate.

Executive Director, Ross Bell is demanding stringent amendments in drug law in order to clamp down on the open selling of new products, which are causing an effect same as cannabis.

Mr. Bell said that a new product was launched in the market a week after the product named Spice was banned.

He suggested some measures like age restrictions, mandatory health warnings, and controls over the marketing of such products.

He also said that these products could be more dangerous than cannabis, as they can be easily obtained from the market and have a handful of controls.

He told Newstalk ZB, "Once controls are put over a certain type of product, manufacturers have a new one the very next day to replace those products. We really need to modernise our drug law so the government isn't playing catch up all the time".

Mr. Bell stated that each time when a drug or synthetic product is banned, the pharmacists act as standing-by and make changes in the ingredients.