- Use of any prescription (see specification below for Trial Part 2) or non-prescription medication, including herbal products and non-routine vitamins, within the last 2 weeks before the start of the trial (screening) that will interfere with the pharmacokinetics of insulin 287, as judged by the investigator in agreement with the sponsor. Routine vitamins and occasional use judged by the investigator in agreement with the sponsor. Routine vitamins and occasional use of paracetamol is permitted up to 48 hours prior to dosing