So before I start I should say I'm not particularly familiar with the opiates overall. But out of curiosity I tried kratom this weekend. About 6-7grams (my scale sucks) in a tea. When I tried a bit of herb later, the effects were amplified like 3-4 times.. i kept coming up and coming up over 30-40 minutes..! laying back with my eyes closed, lush visuals, easily falling in and out of sort of hypnagogic (waking) dreams.. accompanied by a very deep relaxation. it was as if my tolerance to the herb had been instantly reset, accompanied by dreamlike opiate effects..
All in all it was a very lovely experience.. one I couldn't do too often as the hangover the next day was a bit tiresome, albeit still lush and enjoyable.
I've heard these two substances have a synergy between them.. I definitely agree..!