I found a good review online. Here is the link:
[url="http://www.bodybuildingforyou.com/xenadrine/xenadrine-efx-review.htm."]http://www.bodybuildingforyou.com/xenadrine/xenadrine-efx-review.htm.[/url]
It does say that different people will react differently to Xenadrine but for me it has actually worked as an antidepressant. Here is what they say though, if you don't want to go to the above link:
1) l-tyrosine and acetyl-l-tyrosine: tyrosine is an amino acid that is a precursor for a number of neurotransmitters related to our feeling and mood. A deficiency in this results in depression and reduced ability to cope with stress, so with Xenadrine EFX you may get a lift in your mood.

A good thing.
3)3) PEA: Phenylethylamine (PEA) helps increase attention and activity and has been shown to relieve depression in 60% of depressed patients.