Is it an antidepressant? Technically, yes.
Is it a good choice for treating depression? In my opinion, the risks outweigh the rewards. Abuse potential and tolerance is just the tip of the iceberg.
Spot on. I quoted this to highlight it because it needs to be underlined several times... effie popped in with a brilliant post as well
In simple terms, of course amphetamine will lift your mood - you're taking a recreational drug

in the long-run, taking recreational drugs to treat mental illness usually makes the mental illness worse and then you have a drug problem on top of that so all-in-all it's counterproductive.
Lots of times people turn to substances out of desperation to alleviate their psychological distress but as I said, this rarely works out for the person. You can't expect any pill to magically make your depression vanish. If the ONLY reason you had depression was due to neurotransmitter levels this might work but depression is far too complex.
Maybe life circumstances or genetics or diet or all of it or none of it catalyzed your depression but then you cultivate bad habits, especially in your head that reinforce and perpetuate these problems and until you get to these root causes and start to really making changes, you aren't going to see things improving. A lot of people who suffer from depression need more help than a pill can provide. They need someone to help them explore where the problems really arise from and how they can properly address it so while medication can be beneficial to this end, it rarely is sufficient in and of itself and while taking an SSRI or something may not hurt without other interventions, something like amphetamine very well could.
What else have you explored to address your depression beyond popping psychotropics?
I would never represent myself as a qualified professional offering you treatment, but I have a couple years of education on counseling and psychology so if you'd like to discuss any of the above a little more, please do feel free to PM me.