A pharmaceutical composition for controlled drug delivery comprising a \u03b2-lactam antibiotic or its pharmaceutically acceptable hydrates, salts or esters, and one or more carbomers. The air flow is admitted to at least two impactors operating in parallel. The two legs have slots therethrough configured to receive fasteners that, when secured to support members, secure and maintain the extension member in position. The system also performs an interval Newton step on the subbox X to produce a resulting subbox Y. The vehicle also includes an electronic control unit operatively associated with the control device.