Shrouded in anonymity, the questions people ask on the Internet can provide a candid snapshot of their concerns. Now, based on queries made on Yahoo! Answers over seven years, a new study has uncovered the drug-related problems on the minds of six different nations.

 Survey Found: Overall, marijuana was the drug most people had on their minds, followed by cocaine, Xanaz, heroin, MDMA and opiates. In the US and Australia, marijuana appears to be the most popular drug, with the most common search terms being, "how long do the effects last?"

The revealing survey found that marijuana is by far the most talked about drug beating cocaine, MDMA and methamphetamine, in every country but the UK. But it's not the effects that people are concerned with the most.

A closer look at the data suggests that almost every nation wants to find out how to dodge a drugs test. The survey was conducted by drug-related website Detox.net, who focused on six countries; the United States, Canada, United Kingdom, Spain, Australia, and Italy. As well as the number of queries, the group looked at the first two words most commonly associated with questions about the drugs analysed. Overall, marijuana was the drug most people had on their minds, followed by cocaine, Xanaz, heroin, MDMA and opiates. In the US and Australia, marijuana appears to be the most popular drug, with the most common search terms being, "how long do the effects last?"

In the UK, cocaine is the most popular drug with around 34 percent of all search queries relating to the substance. It is thought one in 20 British teenagers between 15 and 16 have tried cocaine.

In May, tests revealed that cocaine use is so widespread that experts were able to locate traces of the drug in Britain's drinking water.

Marijuana follows in second at 29 percent and heroin in third, with 15 percent of questions relating to the drug.

The most common questions for heroin include "what is it?" followed by "how long do the effects last?"

"In this digital age, it's not surprising that people are seeking advice online," Detox.net writes.

"However, what is startling is the extent to which people of all ages may forego real medical opinions on important health topics and, instead, settle for the virtual wisdom offered by faceless strangers."

To get a picture of what advice people were receiving, the group researched some of the answers to these questions.