Surgical adjuncts and medicants for promoting lung function are provided. In general, an implantable adjunct can have one or more medicants releasably retained therein that are configured to promote lung function. The adjunct can be configured to be applied to lung tissue in conjunction with surgical staples using a surgical stapler. The one or more medicants can be configured to promote lung function in a variety of ways. For example, the one or more medicants can be effective to increase oxygen concentration. For another example of the one or more medicants being configured to promote lung function, the at least one medicant can be configured to treat contaminants in lung tissue.