Portable inhaler (1) for a fluid (2) having a preferably insertable container (3) containing the fluid (2) and having a monitoring device (24) for detecting use of the inhaler (1), wherein the monitoring device (24) comprises an acceleration sensor (30), the monitoring device (24) is constructed so that it automatically switches off or is deactivated or goes into standby mode, and the monitoring device (24) is adapted to be activated or woken up by detection of movement of the inhaler (1) by means of the acceleration sensor (30).
