Really? I did not know that. I thought it would become stronger and more intense with a pharmaceutical MAOI just like Syrian Rue produces. I don't understand it either because inhibition of MAO would allow a bigger build-up of tryptamines, right? Or is there a difference in type (competitive vs. non-competitive or something). They're probably all reversible (the ones that are suitable), I heard that irreversible MAOIs would be unbelievably dangerous.
Do you have much experience with mushrooms, the both of you? Because Syrian Rue can cause very strong potentiation, I found it to be quite overwhelming and for a fair part in an unwanted way. Even though I was aware of this chance. If you do decide to take it, that suggested 2 grams is what I would also consider a maximum if I were you.
Grapefruit juice can potentiate via the 'lemon tek potentiation' way which is not really understood and properly proven like MAO inhibition is.
The mentioned CYP 3A4 (I really thought it inhibited the subtype 2D6 as well or instead but I just found out I was wrong) activity is a way of saying it does not work with mushrooms because the tryptamines are not broken down by those cytochromes / enzymes.
This kind of potentiation works by stopping/slowing/limiting the breakdown of a drug which logically allows for a higher build-up in concentration in the body and thus also stronger effect. The inhibitor should therefore slow the relevant and responsible enzyme and not some unrelated one.
For this reason grapefruit juice can make mushrooms stronger (through said lemon tek potentiation which is thought to be based on in vitro alkaloid conversion), but in a whole other way than how grapefruit juice can make opiates or DXM or a number of other things stronger (cytochrome P450 inhibition).
I think that the stronger a combined drug is on it's own, the less we should call it potentiation and the more we should call it synergy.
Other drug effects adding up in unrelated pharmacological mechanisms is not potentiating the mushroom's mechanisms.
Cannnabis for example, seems like synergy to me and it's not simply making the effects of mushrooms stronger but changing the resultant effect as well.
Ketamine: same thing.
Syrian Rue: does make the experience more spiritual and different (I'm not the only one who thinks so), but more of a potentiator especially considering the way it acts.
Moclobemide: apparently for DMT there is less 'change' in effect with oral ingestion compared to vaporizing DMT. So I'd have thought you could say it has little truly psychoactive effect on it's own or it 'colors' a drug experience less than Syrian Rue. But Sekio says differently when talking about mushrooms rather than DMT and of course I believe him.