The pharmacist must measure the methadone dose using a calibrated device with an error rate of no greater than 0.1ml, which is equal to 1mg. All devices used to measure methadone should be distinctive and recognizable and should be used only to measure methadone solutions. Devices should be labelled with a “methadone only” label and a “poison” auxiliary label with the international symbol of the skull and cross bones. Pharmacists may contact their wholesaler for assistance to locate a product that meets the required specifications.