District Health Boards spent more than $280 million over the past three years treating patients who became sick after being prescribed the wrong medication.

Though the Ministry of Health says some of those admissions were unavoidable, as it could have been an unknown allergic reaction to a drug, experts have raised "serious concern" about hundreds of preventable cases, such as a patient who died after being given two drugs that shouldn't be used together.

New Zealand Nurses Organisation (NZNO) organiser Donna MacRae told the Herald it was an issue that was putting patients in unnecessary danger and was also "money

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DHB spending:

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Medication error complaints: