New Zealanders with ADHD, are being forced to switch medication, after supply chain issues have meant that a popular drug is no longer available.

Four thousand people no longer have access to Teva [tee va] , a popular stimulant drug used to treat ADHD, and have been left scrambling to adjust to alternative medication.

ADHD New Zealand's Darrin Bull told Mike Hosking the issue isn't going away anytime soon.

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