Police in Scotland have issued a warning over pink superman pills currently in circulation in the west of the country.
They say that tests have shown that the pills contain PMA (or methoxyamphetamine), a chemical similar to ecstasy but more toxic.
Pills containing PMA have lead to a spate of deaths among users, with tabloids last year reporting on 'killer pills' sweeping the UK. We also ran our own investigation looking into the influx of PMA pills onto the market and their effects.
If you are in doubt about pills that you have bought, try checking Pill Report.