Police fear crystal meth is set to replace heroin as the public’s most used drug, after recipes for the substance were found on several websites.

The internet sites included ingredients such as painkillers and iodine that can be purchased in any supermarket.

One website, according to The People, promises, “no lies here, folks, this recipe will manufacture methamphetamine.”

Crystal meth is a popular clubbing drug with the gay community, also known as ‘tina’, ‘krank’ or ‘ice’, the ease of production and euphoric effects have ensured dramatic escalation of the drug’s distribution worldwide.

Users experience a temporary sense of supreme confidence, alertness and have an increased perception of self-attractiveness. On the other hand it also delivers paranoia, agitation and violence in some individuals.