Hi, My first ever experience with Kratom was with the Thai strain; I chewed roughly 7.5 grams which gave me great euphoria for the first 5 times I had it. I had 7 day breaks in between each of my first 5 doses. Since my first 5 times I have never felt any euphoria with it; I have tried using Grapefruit Juice but this didn't potentiate the effects. I do also use Codeine which might affect the opioid receptors? But I did have a four week break from all drugs. At the end of the break I started taking the Kratom again, but still no euphoria. I do also get the mild nausea on 7.5 grams. Any advice to "get back" the euphoria would be great!