Injecting a drug provides a quick and intense effect. When injected into a vein (intravenously), you feel the effect after 15-30 seconds, when injected into the muscles (intramuscularly) or under the skin (subcutaneously) after 3 to 5 minutes.

Because a large amount of drug enters the bloodstream at once and nothing is lost of the drug, injecting a drug often results in a ‘flash’. The other administration methods do cause the euphoria but no flash (except smoking base coke/crack).

Injecting is the most risky way of ingestion, because you pass all the safety barriers of the body. Injecting almost never occurs among recreational users in the dance scene. In the small scene of psychonauts there are sometimes experiments with the intramuscular administration of ketamine. But injecting is rare there as well.

For example: injecting heroin, cocaine or speed into a vein (‘shot’), injecting ketamine into the muscles.