The £2.2m Home Office campaign has been launched to warn of the links between cannabis use and mental health damage. The add depicts the drug's side-effects - memory loss, paranoia and panic attacks - as unwanted guests at a party in the user's brain and is aimed at 11 to 18-year-olds.

The campaign urges youngsters curious to learn more about the drug to "Talk to Frank" by calling an information line or visiting a website where they could get advice on the dangers of drugs, the law around their use and how to get help.

Cannabis binge smoking may be putting people's mental health in serious danger.

There is evidence of a link between cannabis and mental health problems such as schizophrenia, and those who first use it at an early age may be more at risk. The fact is that you never truly know what you will get and stronger cannabis, such as skunk, can increase the chance of suffering a bad reaction.

Hard-hitting campaigns like this one are essential for convincing people just how frightening the effects of cannabis can be. For those who are vulnerable, taking it may not be just chilling out for an evening but could turn into robbing oneself of the chances in life.

Many teenagers experience serious personality changes with regular cannabis smoking. They go from being very academic, sporty, good students and loving children to people with low moral who may even turn against their families.