A dispenser (10) to deliver a liquid medication. The dispenser (10) includes a hollow reservoir body (11) providing an interior that receives the liquid. The body (11) has a threaded neck (13) that receives a cap (58). The cap (58) includes a pump assembly (17) and a nozzle member (29). The pump assembly (17) includes a vent one-way (48) that provides for the delivery of air to the interior of the reservoir (11).