I have been shooting Methadone liquid (with Dex.) for almost 15 years ... I am 99.98% out of viable vein/injection site options but have been injecting off and on for 35+ years.
I noticed that I got a second run at some veins but only after a 10 year recovery period ... I had a good run but if I wasn't such a cheapskate and didn't make Methadone and Dexamphetamine my DOC, then I wouldn't be regretting it as much.
yes, injecting syrup and filtered pills with butterflys was a dumb move but hey, it worked at the time.
and of course, financially viable ... i should've used less but better drugs, all in all.