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Using cocaine puts you at a higher risk of catching a sexually transmitted disease (STD), as well as other health issues relating to drug use. According to a new study by researchers at the Johns Hopkins University of Medicine, cocaine results in "sexual-impatience", which means users are less likely to use condoms.

The study looked at 12 volunteers, all of whom identified themselves as cocaine users. Each participant was shown 60 photos of people to select those they'd be willing to have casual sex with. They were also asked to identify those who they thought were less likely to have an STD.

Participants were then asked about how likely it would be for them to use a condom if one was available straight away, as well as how long they would be happy to wait to get a condom before having intercourse.

It was found that the longer someone who had taken cocaine had to wait to get a condom, the less likely they were to use one. This means that that they put themselves and their partner at risk of STDs and unwanted pregnancy.

According to the researchers, using cocaine increases an individual's sexual desire and so they are less willing to postpone intercourse, even if this means more time to get a condom. They become impatient so are more likely to put themselves in the situation of having risky intercourse.

A previous study that looked at the effect the alcohol has on decision making when it comes to safe sex revealed similar results. Although alcohol doesn't increase sexual desire, it does mean people are more impatient so may skip out on condom usage.

Matthew Johnson, a researcher on the study, said: "Our study affirms and may help explain why people who regularly use cocaine are more willing to partake in risky sex when under the influence of cocaine, and underscores why public health officials and physicians should be ensuring that cocaine users are supplied with condoms to prevent the spread of sexually transmitted diseases."