Another minor point to be aware of is, that Lysine can inhibit the effects of a Herpes Virus, which may also include Zoster, (Shingles).
Arginine can promote the effects of a Herpes Virus. Though such a virus is a latent agent, (a resident virus that shows no symptoms), as its related to Chickenpox, which never goes away after it stops being active, (Chickenpox exposure when you have the latent virus, can sometimes trigger Shingles).
However Arginine I think will only promote the virus's actions when it's actve, not when it's latent, so don't worry too much about that. If you had Chickenpox in the past, you should be okay to have Arginine supplements, providing you don't have Shingles at the moment, or possibly another type of Herpes virus.
What Ult said about Glutamine is good too. I use it. Glutamine is a protein synthesiser, but also can promote Hypothalamic responses, as it's a Neurotransmitter, same as Phenylalanine and Tryptophan are.
THe Hypothalamus is the part of the Brain that regulates Insulin, Adrenaline, Cortisol, Thirst, Satiety, Sleep, Digestive Enzymes, Growth Hormones and body Temperature to name but some. It's the governor of the Endocrine system, so things like Dopamine, Seratonin, Hypocretin etc, that govern sleep and mood may be influenced by Glutamine in a positive way