Actually, I believe that LSD, like most other hallucinogens, is a 5ht (seretonin) agonist. Granted, it doesn't flood your brain with serotonin like MDMA, but it does fool around with it for a while. They have actually found that LSD is only active in the brain for 30 minutes which deepens the mystery of EXACTLY what it does. The last time I tripped was on 2 tabs of Orange Sunshine about five weeks ago. I got MAD jaw clenching, i mean it was insane. I thought that I was going to break my teeth. I had to get my rubber toy i chew whilst rolling.
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Ignorance will fall, wisdom will prevail.