That sounds a little like my short experience with Niacin.
The big minus to Niacin was that I had vivid and disturbing dreams, bordering on Awake Dreaming.
I took it hoping to boost brain function.
I later settled for using Vitamin B3 instead.
Lion’s Mane is effective at boosting cognitive function, especially recall for words and names. This presumably follows from its documented ability to potentiate Nerve Growth Factor. In my experience, it also has a slight mood brightening effect. Some call it an antidepressant effect, but I wouldn’t go that far. But it is definitely not a hallucinogen at any dose.