Multi-use drug delivery device for drugs with less preservatives

Abstract

A multi-use drug delivery device for extended use, wherein the multi-use drug delivery device comprising a multi-use main portion () and a single-use flow conducting device () adapted for conducting drug to the subcutaneous tissue of a subject, wherein the change from a connected configuration to an unconnected configuration of the main portion and the flow conducting device is through the intermediate configuration. The intermediate configuration comprises an equalizing channel defining an equalizing flow path () different from an unintended flow path (). The equalizing channel is adapted for equalizing the fluid pressure in a fluid communication volume () to the fluid pressure in the external environment, upon changing the configuration from the connected to the intermediate configuration and thereby expanding an internal volume, whereby an equalizing fluid flow along the equalizing flow path is larger than an unintended flow along the unintended flow path, whereby equalization of the fluid communication volume is provided with a reduced risk of introducing microorganisms from the flow channel () into the reservoir ().