Yeah I'm going to leave this thread open (at least presently) for the sake of other members.
Opioids do not have the advanced level of affecting the brain to reliably sustain increased mood without having to increase the dosage frequently. This means that they don't work as antidepressants, but as pain medications and drugs of abuse.
Furthermore, most any drug that entirely makes one's life much easier, is in fact a drug of abuse, and will merit an increased dosage before long, in order to sustain the positive effects on mood.
Neither alcohol, oxycodone, amphetamine, nor other addictive drugs are antidepressants. If used continuously, one either increases the dose or stops use. Eventually, they will continue to use and increase their dosage so that they give everything they have and more just to stay out of withdrawal.
Please stay away from opioids for depression. Feel free to read the plenty stories on this site about people who wrongly thought that opioids could help them in a psychiatric manner. Please stop using them now, or things will get very bad, very fast.