There are sites that talk about antidepressants and their noted dulling of psychadelics (also prescribed by therapists) i learned that some types of uptake inhibitors can 'fill' the same receptors that the mushrooms use. Turned out my newly prescribed anti-depressant was listed as "most dulling" (which tracked with the reason i looked it up in the first place).
I also read that some interactions with a couple types drugs can actually be dangerous, overloading the brain with seratonin and even causing seizures. You should be careful and check it out friend, meanwhile I'll see if i can find that site again with your drug
edit: here is the site i remember, with helpful explanations of some interactions.
Looks like It was lithum i was referencing as possible OD. lamictal is not listed, sorry.
I can't really find anything official on lamotrazinec's effects but the shroom heads on Reddit and around the web i saw seem to experience dulling effects from it.
I'm trying to figure out who the fuck might read this "polywork" bullshit and think to themselves: "yes. Both this take and this person are both sane and good"