What does inhalation refer to in the context of drug use?

Inhalation, in the context of drug use, specifically refers to the process of smoking or otherwise delivering substances directly into the lungs. This method allows for rapid absorption of the drug into the bloodstream through the pulmonary system, enabling a quicker onset of effects compared to other routes of administration. Inhalation methods can include smoking substances like marijuana or using devices designed for vaporizing drugs. This direct access to the lungs makes inhalation a common method for users seeking immediate effects.

Other methods of drug administration, such as taking drugs orally, applying drugs through a patch, or injecting drugs using a syringe, involve different processes and routes of absorption. Each method has its unique characteristics, effects, and potential risks, but in the context of this question, inhalation distinctly aligns with the process of smoking or delivering substances into the lungs.