Children taking l-ornithine for insomnia on humaworm cleanse

Hello. I have a 2 1/2 yr. old who is 30 lbs. He has a confirmed case of parasite dientamoeba fragilis, with recurring diarrhea. I chose to put him on the humaworm formula for children. He is currently presenting with very bad insomnia symptoms, which I have read is from the amonia in the brain from the parasite detox. It is advised by Dr. Hulda Clark to take ornithine for this to neutralize the amonia, which has worked very well for me personally. Everything I have read on the web, however states that ornithine should not be given to children. Dr. Hulda Clark has a statement that reads that children "should not supplement excessively" with this. My question is, since it is simply an amino acid, would it be OK for me to give him just a vey small dose to help him sleep. I am desperate to figure out what to do because he can't sleep, and yet he needs to get rid of this parasite! Please help.