Interesting to read about these hallucinations...the only time I've had similar experiences on op!@tes is when I first started and had way too much, even then it was only minor...
I think mixing herb into it might cause something... I haven't smoked it for about 18 months, but it can be mildly psychedelic...I think...
But with your experience Biteme, I'm really at a loss...when I took tr@m I never noticed anything, and I mixed the two very frequently...I don't think serotonin is an issue, as I don't think Kr@to m works on it...I feel dodgy saying that, as I know serotonin syndrome can be unpredictable, not to mention dangerous, so proceed with caution if you suspect it. If you can get away with lowering the tr@m dose, even by just 50mg, that might be worth thinking of...