If SHE'S lookings to get clean, (she has to want it) I'd recommend Suboxone
or anything relating to it, verus Methadone
. Just because Methadone is more addictive then heroin
.... It'd be exchanging one addiction
for the next...
Back when I was using, my boyfriend & I usually averaged the same amount each. (I was usually 7/8ish, but ssometimes I'd do more) It also tells me she has money to spend.. (how else would she feed the habit...) Suboxone & such, can be/is more espensive then Methadone treatment, depending on her insurance, & she'll need to find a doctor who has been trained to subscribe it. But I personally think, as well as many others, its the best route, if it can be done. It comes in a little orange pill, or film, I recommend the film, because it has to be placed under the tongue, to disolve.
Just remember, if she isn't ready, don't force. A person has to want to get clean to get clean. You can force a person into treatment 20 timess, & after they get home, they'll continue use, but with a lower tolerance. When its even more possible to OD.
Hope it works out for you. You might wanna check on the addiction forum, mainly haroin. Their is a bupri... (i dunno the spelling, but its the medical term for suboxone's main ingrediant) in the header topics... that's what it starts with... that will give you more info into suboxone. It truely saved my life. And I've gotten to the point where i don't need to take it everyday, unlike methadone... hope you find what your looking for.
& it took me about 6 months, from just recreationally useing, to hardcore using... just saying.