I went tripping with some friends once and one of then started drinking rum and coke while tripping first it was kind of funny because he drinks a lot and we where laughing at how when you're in mushrooms you're the "real" you. I don't know what kind of trip he had or if the mix had to do with it, but now he's a different person, he's apathic, always quiet and doesn't drink (still smokes pot thou).
I've found out that lon after the effect is gone, drinking some wine and smoking a joint the best. Nothing before or during.