What is the primary method of usage when heroin is snorted?

Snorting heroin primarily involves inhaling the drug through the nasal passages, where it is absorbed into the bloodstream through the thin membranes lining the nasal cavity. This route of administration allows the user to experience the effects of the drug relatively quickly, as it bypasses the digestive system and enters the bloodstream more directly than oral consumption would.

While injection is another common method of using heroin, it involves injecting the substance directly into the bloodstream, which is different from snorting. Oral consumption, meanwhile, requires the substance to be ingested and absorbed through the digestive tract, resulting in a slower onset of effects. Therefore, when considering heroin use via snorting, inhalation is indeed the primary method, as it efficiently delivers the drug into the body through the nasal route.