The popular drug MDMA - also known as ecstasy - has been legalised in the United States for use in a clinical trial involving terminally ill patients.
The trial will use MDMA along with psychotherapy to treat anxiety in patients who have a terminal illness. The study aims to gauge the effectiveness of the drug as a viable medical treatment.
As anyone who's attended Creamfields will know, MDMA brings on an energy buzz, intensifies colours and sounds and engenders feelings of love and affection for repetitive house music and fellow sweat-stained ravers.
However the come-down from the drug can include anxiety itself, as well as depression. And super-strength pills have been known to be fatal.
The organisation behind the trial is a California-based non-profit called the Multidisciplinary Association for Psychedelic Studies (MAPS) "develops medical, legal, and cultural contexts for people to benefit from the careful uses of psychedelics and marijuana".
It was granted approval for the use of MDMA in the trial last week by the United States' Drug Enforcement Administration.
The MDMA used during the trial isn't the same stuff you'll find around the average festival ground - it's pure methylenedioxy-methamphetamine created without the usual additives found in common ecstasy.
"It's not so much anxiety that MDMA produces but rather arousal," Brad Burge, director of communications at MAPS said.
"When that arousal comes about in an unsafe situation, such as outside of therapy, or in a recreational context it may be experienced as anxiety.
But in the context of psychotherapy, that arousal may be experienced as a form of fear but also excitement and tension that comes with MDMA. So that anxiety can be used productively to assist the therapeutic process," he told Engadget.
MDMA brings on an energy buzz that can be followed by depression and anxiety
This isn't the first time MDMA has been used in a clinical study in the USA - in fact it's the seventh.
But for the drug to become fully legal, it would have to pass through the country's Food and Drug Administration (FDA) for regulation after several successful studies - a process that's unlikely to happen until at least 2017.
For the purposes of the clinical trial, 18 terminally ill patients with a life expectancy of at least nine months will take part.
Five subjects will be given a placebo, while the rest will be handed a 125mg dose of pure MDMA alongside psychotherapy. The results will be carefully measured and form a body of studies that will eventually be submitted to the FDA.
Currently, the UK recognises MDMA as a class A drug and has not legalised its use for any form of psychotherapy.
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MDMA made LEGAL for terminally ill patients in America