They discovered the effects were more severe during music by the dance band than during works by Bach. Loud music alone didn't harm the mice - those given injections of plain salt water instead of speed fell asleep during the "rave"
Jenny Morton, of Cambridge University, said: "It seems that listening to pulsatile music strengthens the toxic effects of methamphetamine." She also noted that drugged mice subjected to both kinds of music also had more disturbing behaviour - remaining in one spot but swaying backwards and forwards.
Four of the 40 'Bach' mice exposed to died during or after the experiment, while seven of the 40 'Prodigy' mice died.