Rhodiola is a fairly powerful herb. I've heard some enthusiastic testimonials to its benefits. Unfortunately, it gave me near total insomnia, although it had been recommended to me by a fellow PTSDer because it had normalized his own sleep.
I bought Solgar brand, which is packaged with a good variety of antioxidants. I felt a boost, right away. But as I say, I couldn't sleep.
Here's a detailed review article:
http://content.herbalgram.org/iherb/...iew.asp?a=2333
Lar