Methadone clinics do give take home doses, public clinics are less likely to do this. Holding methadone in your mouth, then injecting later is a stupid thing to do, but I dont doubt that people do this. Injecting methadone isnt really worth it since it is so well absorbed orally, but I have injected the oral solution many times. Injecting this solution is dangerous, so I usually run it through a .2 micron filter to remove bacteria. Even then, its hard on the veins, so when I encounter methadone nowadays, I usually take it orally. Injecting it is definately a better high, but unless you have a micron filter (or dont care about your health) you shouldnt inject it. In europe I hear they have ampules, but even this can be hard on the veins.....