My experience with L-lysene has to do with cold sores on the mouth (same virus as shingles, though), and I don't know where to tell you to find information on it, but I know a great many people who use it. I suspect the answer to be similar in both situations.
At the first sign of outbreak, begin taking 2-3 capsules of L-lysene, 3-4 times a day. Continue until the outbreak begins to get better. With cold sores, this greatly shortens the duration of the outbreak. I hope it works for shingles too.
Mindell's Vitamin Bible is a good source of information for holistic medication. Lysene is an amino acid that your body needs. It works for shingles, and herpes simplex I & II.