Drug delivery inhaler devices

A drug delivery inhaler device having:

• an L-shaped body with an upright portion for housing a drug reservoir and terminating at an air inlet and a transverse portion terminating at an outlet for communication with the mouth of a patient;
• an air flow path through the device along which air is drawn from the air inlet of the upright portion of the body to the outlet by inhalation by the patient;
• a seat for location of a drug reservoir, the drug reservoir being operable to deliver a dose of aerosolized drug into the air flow path for inhalation by the patient;
• and
• an air flow rate indicator operable to continuously indicate when the air flow rate along the air flow path is at or above a predetermined minimum level suitable for delivery of the drug to the patient both before and during delivery of the drug,
• wherein said air flow indicator is provided in the airflow path at or proximate the air inlet of the upright portion of the body upstream from the point at which the dose of aerosolized drug is ejected into the air flow path.