How are drugs that are absorbed into the bloodstream after passing through the lungs taken?

Drugs that are absorbed into the bloodstream after passing through the lungs are taken through inhalation. This method allows for the substance to enter the respiratory system, where it rapidly diffuses across the alveolar membranes directly into the bloodstream. This is particularly effective for certain medications, such as those used for asthma (like bronchodilators) or anesthetics, because the lungs have a vast surface area and a rich blood supply, facilitating quick absorption and onset of action.

Inhalation ensures that the drug bypasses the digestive system and liver metabolism, which can alter the efficacy of many substances. This method is commonly utilized for both therapeutic and recreational drugs, maximizing their delivery and effect through the pulmonary route.