Plugging will be stronger every time with Morphine, in my experience. You should just skip the rest of this and administer rectally and see for yourself.
I was a Heroing addict for ~15 years. I have used plenty of other drugs, Methadone included.
Ive done it all.
Protein Pump Inhibitors e.g. Cimetidine (Tagamet)
Grapefruit family of fruit. Grapefruit juice. Grapefruit extract. Drinking Grapefruit juice every day.
Cats Claw (common medicinal herb)
Ive been there and done it. Do not waste your valuable time and energy on what are generally, trivial pursuits. Totally, utterly, trivial.
Do we invest hours into research, paying money for the shit, sitting and waiting and wondering.
Let's say, and i think this is a longshot, you could get a 10% boost on your Morphine. I mean, will you actually feel the difference? Maybe, slightly. This is in the most ideal of circumstances.
When dependent on Opioids and wanting the "magic" back, the only way is by reducing your dosage. That's it.
We are Opioid addicts man, come on. We get a 10% boost on our Morphine and that just what, changes everything? No. We take the increase then turn around and ask for the next increase.
So now you eat a Grapefruit every morning for literally the rest of your life? Any increase, I dont care if it is double, triple... give it a few days of sedation followed by "well, this is now my life, exactly how it was before, except now I need to pick up grapefruits and Heroin to stay well.
Its a fun topic to muse about, but we are addicts. The solution is never in more drugs.
As an Opioid dependent person, you've probably got 5--7 days tops before you cant even feel the difference. Then you are just tolerant.
Opioids as recreational drugs are only for occasional usage. You can feel them again, but that feeling doesn't come back from getting more dope, it comes back from being less-saturated.
Example:
In America, Fentanyl created habits that are practically 10 times higher than they were with Heroin. 10 fucking times. Do they look happy to you?