Police are reminding festival goers about the risk of taking drugs ahead of this weekend's Electric Avenue Festival at Hagley Park in Christchurch.
More than a dozen people were hospitalised at last year's event after taking a bad batch of MDMA.
Police say the easiest way to prevent drug harm is to not take any substances at all.
A crowd of 16000 is expected to turn out tomorrow, up from 13000 last year.
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