I have the same issue and was told this:
"Alcohol causes endorphin release indirectly. Thats why opiate antagonists are used to treat alcoholism, they take the euphoria out of drinking.
Using opiates down-regulates opiate receptors so alcohol doesn't have as much of an effect on them and you don't get a buzz"
maybe its permanent down-regulation??
If this is supposed to mean that you can't enjoy alcohol while on opiates, either Kratom or others, it's not true for me.
In fact, I am one of the few people who enjoys drinking on Kratom.
I don't usually do it and I DO find that Kratom strongly decreases my cravings for alcohol which is very nice, but the few times I have drank on Kratom I've GREATLY enjoyed it.
I remember one time when I was brand new to Kratom I went to a brewery for a beer tasting and the euphoria from mixing quality beer with Kratom while sitting out in the sunshine was INCREDIBLE.
I have also enjoyed drinking wine on UEI Kratom extract.
It doesn't make me feel at all sick to drink on Kratom, and unlike other strong opiates it doesn't really depress your respiration so it is safe.
One of the best highs I have ever had in my life was getting drunk on red wine and whiskey while on a mixture of Green Malay and Bali Kratom along with some strong coffee while smoking and vaping some good weed and doing balloons of nitrous.
The combo of Kratom, booze and weed and caffeine is straight up PARTY material lol.
You've got your opiate, your stimulant, your depressant and your weed.
Covers pretty much all your bases.