entering a drug rehab?

im curious to know what goes on in a drug rehab.. my friend does drugs, quiet often.. and is quiet broke because of it.. he does meth once every two months or so… coke probably once a week, and smokes weed like people smoke cigs, i bet he gets high 10 times aday… i want him to enter rehab and i want to explain to him what all goes on.. what the facility is like… if it can be kept private, how much it cost.. what he actually does inside the facility… etc …. hes been doing weed for about 5 year’s, hes 19, meth for about 8-10months, and coke for about the same duration

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