Due to the continuous search for new, legal, less expensive, and more powerful highs by drug users, the synthesis of novel cathinone derivatives has become a fruitful industry, leading to a fast emergence of new alternative substances every year. Methylone (3,4-methylenedioxy-N-methylcathinone) is one of the substances that rapidly emerged as the main ingredient of “bath salts”, becoming readily accessible on the Internet. This fact has raised concerns about its potential harmfulness.

The aim of the present study is to analyze the presence of methylone in samples delivered to energy control from 2014 to 2015 in Spain.

A total of 8324 samples were assessed from June 2014 to May 2015. Only those samples acquired as methylone were studied. They were analyzed by energy control, a Spanish harm reduction NGO that offers the possibility of analyzing the substances that users report. Analysis was done by gas chromatography-mass spectrometry.

Ten users reported to have acquired methylone (0.12%). The most used source for acquiring it was the Internet (60%). Other sources included a friend or relative (10%), home-delivered (10%) or undetermined (20%). There was no peak of consume as 50% were acquired in 2014 and 50% in 2015.

According to the results, the presence of methylone in our samples is extremely low. Therefore, despite the fact that methylone monitorization is ought to be carried out, this substance is not expected to be an emerging issue concerning Public Health and no further clinical research should be done.

The authors have not supplied their declaration of competing interest.