I've taken shrooms a couple times recently (2g doses) with incredibly minimal effects. I know the shrooms are potent, two friends started tripping at half that dose. I know lamictal blocks dissociative states does that mean it blocks the ability to trip too?
If you ever feel inclined to, Stahl's psychopharmacology is a really good book for this.
It's dense and it will probably be challenging depending on your current level of knowledge of biology/psychology/chemistry but if there's one book that I could recommend for understanding the whole thing in a comprehensive way, it's this one.