LSD is a strong seratonin agonist. There are 7 subsets of seratonin receptor sites they know of. Many are in the gut. They have just recently discovered that the stomach has a lot more nerves then they had previously thought. Hmmmm..... If the standard shit doesn't help (25mg diphenhydramine/dramamine, eating a little, antacids, etc) I think you will have to endure. ISO-LSD which is formed when LSD is broken down by poor handling or storage is speculated to cause more discomfort as well.....try a different batch?