Inhaler for dispensing an inhalable medium, with the following features: a. the inhaler has a housing with a mouthpiece and with a chamber for a container unit, which chamber is surrounded by a chamber wall and is open at one end, and b. the inhaler has a container unit arranged in the chamber, and c. the container unit has an outlet connector which is attached to a discharge channel of the housing in a communicating manner, and also a container for storing the medium before discharge, wherein, by moving the container with respect to the outlet connector, an outlet valve of the container unit can be opened, and d. the container of the container unit faces the open end of the chamber so that it can be pressed down in order thereby to open the outlet valve and allow medium to pass through the discharge channel to a discharge opening at the end of the discharge channel, and e. an annular gap is provided between the container and the chamber wall of the chamber, through which annular gap air is sucked in during inhalation and mixes with the medium flowing out through the discharge opening, and f. the inhaler has an evaluation unit which is placed onto that end of the container facing away from the outlet connector and can be pressed down together with the container, wherein the evaluation unit is designed to detect the air sucked in at the mouthpiece, characterized by the following further features: g. the evaluation unit comprises a measuring channel with a measuring channel inlet and a measuring channel outlet, wherein the measuring channel forms part of a first flow path for air flowing into the open end of the chamber from an environment and, between the measuring channel inlet and the measuring channel outlet, has a flow sensor for detecting the air flowing through the measuring channel, and h. a second flow path is provided for air flowing into the open end of the chamber from an environment, which second flow path does not lead through the measuring channel, and i. the first flow path and the second flow path are matched to each other in such a way that the flow resistance of the first flow path corresponds at least to the flow resistance of the second flow path. a. the inhaler has a housing with a mouthpiece and with a chamber for a container unit, which chamber is surrounded by a chamber wall and is open at one end, and b. the inhaler has a container unit arranged in the chamber, and c. the container unit has an outlet connector which is attached to a discharge channel of the housing in a communicating manner, and also a container for storing the medium before discharge, wherein, by moving the container with respect to the outlet connector, an outlet valve of the container unit can be opened, and d. the container of the container unit faces the open end of the chamber so that it can be pressed down in order thereby to open the outlet valve and allow medium to pass through the discharge channel to a discharge opening at the end of the discharge channel, and e. an annular gap is provided between the container and the chamber wall of the chamber, through which annular gap air is sucked in during inhalation and mixes with the medium flowing out through the discharge opening, and f. the inhaler has an evaluation unit which is placed onto that end of the container facing away from the outlet connector and can be pressed down together with the container, wherein the evaluation unit is designed to detect the air sucked in at the mouthpiece, g. the evaluation unit comprises a measuring channel with a measuring channel inlet and a measuring channel outlet, wherein the measuring channel forms part of a first flow path for air flowing into the open end of the chamber from an environment and, between the measuring channel inlet and the measuring channel outlet, has a flow sensor for detecting the air flowing through the measuring channel, and h. a second flow path is provided for air flowing into the open end of the chamber from an environment, which second flow path does not lead through the measuring channel, and i. the first flow path and the second flow path are matched to each other in such a way that the flow resistance of the first flow path corresponds at least to the flow resistance of the second flow path.