It is highly unlikely for a dog to get high from licking the skin of a heroin addict. Heroin is not typically absorbed through the skin in amounts that would lead to intoxication, especially through casual contact like licking.
Heroin is most commonly ingested by injection, smoking, or snorting, where it enters the bloodstream in higher concentrations. The drug's effects on the body are a result of how it interacts with the brain's receptors, leading to feelings of euphoria and sedation. When a person uses heroin, it is absorbed into their bloodstream and metabolized by their body.
Even if trace amounts of heroin were present on the skin of an individual who recently used the drug, the likelihood of a dog ingesting enough to experience any intoxicating effects is extremely low.
However, it is important to note that heroin and other drugs can be dangerous and toxic to pets if ingested in larger amounts. If you suspect that a dog or any pet has ingested drugs or any toxic substance, it is crucial to seek immediate veterinary attention.
Additionally, if you are aware of drug use in someone you know, it is essential to encourage them to seek help and support for their addiction, as it can have serious consequences for their health and well-being.