Patent ID: 7047964

Claim:
A dispenser for a medicament or the like to be inhaled as successive doses, the dispenser comprising: a dispenser body having an inhalation passage leading to a mouthpiece; a pressurised source of the medicament arranged at an up-stream end of the inhalation passage; a junction in the body for receiving a stem of the pressurised source and directing the pressurised medicament for inhalation; means for controlling release of doses from the pressurised source; a transducer for detecting gaseous flow within the dispenser associated with release of a dose for inhalation; wherein: the transducer is an acoustic transducer arranged to detect noise of gas flow within or from the pressurized source of the medicament on release of a dose; and a counter arranged to be incremented or decremented in accordance with each flow detection by the transducer, wherein: the counter including an associated detection circuit that is adapted to recognise the spectrum of a particular gas flow in use of the dispenser and to increment/decrement the counter in response to such recognition.