"L-Arginine and L-ornithine sometimes reactivate latent herpes virus infections, so persons who have ever had ocular or brain herpes must not use either of these as GH releasers.
Certain psychotics may experience worsened symptoms if they take arginine or ornithine supplements.
When taking growth hormone releasing amino acids such as L-ornithine, it is recommended to take one to three grams choline and one to two grams pantothenic acid, vitamin B5."
"L-arginine supplements should be avoided by those that have a tendency to suffer from herpes simplex (cold sores), as this amino acid can exacerbate the condition. (Consumption of L-arginine rich foods such as chocolate, milk, meat, cheese, nuts, popcorn and peas should be reduced as well).
L-ornithine does not have the same stimulating effect on herpes simplex."