The intensity of heroin withdrawal syndrome is variable depending on the dosage of the drug used and the frequency of use.
You don't have to be legally intoxicated (.10%) to get an OWI ticket. The police just have to register alcohol. The ability to drive is what's important.
Among the hazards of illicit drug use is the ever-increasing risk of infection, disease, and overdose. Medical complications common among narcotic abusers arise primarily from adulterants found in street drugs and in the non-sterile practices of injecting. Skin, lung, and brain abscesses, endocarditis (inflammation of the lining of the heart), hepatitis, and AIDS are commonly found among narcotic abusers.
Heroin is smuggled into the United States and Europe from areas such as the Golden Triangle (Southeast Asia); with Afghanistan currently being "the world's largest exporter of heroin".