It has been proven that drug rehab reduces costs associated with health and social costs of addiction, by far more than the cost of the treatment itself.
Opiates which also have legitimate use in medicine but are commonly abused include morphine, meperidine, paregoric (which contains opium), and cough syrups that contain codeine.
The average GHB dose can range anywhere from 1 to up to 5 grams (depending on drug purity) which can be 1-2 teaspoons mixed in a beverage.
Studies indicate that most inhalants are extremely toxic and that "huffing" can often have fatal consequences.