Our Swiss colleagues have discovered the particularly harmful substance Paramethoxymethamphetamine (PMMA) identified. It is a pink tablet with the Rolex (crown) logo, which is exclusively  PMMA (see photo).
The warning from Safer Party can be found under the following link: http://www.saferparty.ch/tl_files/images/download/file/Warnungen_PDF_2015/PMMA_Juni_2015.pdf

In the past, PMMA/PMA warnings have been repeatedly issued throughout Europe - we have also found PMMA/PMMA in various substances in recent years.
If you decide to use synthetic substances - despite the health and legal risks, Have your substances tested!
If this is not possible, follow the safer use rules: test carefully, wait for the effect, don't top up straight away!

You can find more information about PMA/PMMA here: https://checkit.wien/substanzen/pma/