Is there a drug around for just about everything?

It seems like there is. Unfortunately, the drugs only mask the underlying cause of the disease by treating the symptoms. In addition to this, many people have to take a whole slew of other drugs to counteracts the gnarly side effects of the initial drug. Most drugs don't even work as effectively as they should (prozac only has a 40% success rate), and lots of other drugs seem to work well on some people and not on others.

Can we raise our levels of dopamine ourselves?

I believe that our hormones are largely influenced by the way in which we lead our lives. If we live with a significant amount of stress, our bodies are constantly releasing cortisol, which in the long-term has a very deteriorating effect on our immune system. Dopamine is a neurotransmitter of the Biogenic Amine group and more specifically a catecholamine, derived from the amino acid tyrosine. Perhaps if we can get more tyrosene in the body, we can produce more dopamine??
Also, dopamine is degraded by certain enzymes with really long names, so maybe if you can eliminate having too much of those enzyme in the body, you can increase your dopamine levels? i don't really know.
How do you think chimps and humans diverged as species?

I think our species must have split millions of years ago and was probably some in between species before becoming the homo sapiens. Honestly i can't exactly know how it happened!