This medication alert is to advise that the Aotearoa New Zealand standardised batch sheet for baclofen oral suspension will change to a 1 mg/mL concentration from 1 November 2021. This means that for patients taking baclofen oral suspension, the concentration and the amount of medicine they need to take may change. The alert highlights actions for all prescribers, pharmacists and nurses to reduce the risk of inadvertent under- or overdosing with baclofen oral liquid or suspension.