Scientific study has proved this drug generally useful for six months, but the long-term benefit is unknown.

CNN: Better understanding of dementia leading to more effective therapies

"Despite a considerable amount of research into the effects of legal highs, much is still unknown about their longer-term impact, " she said.

BBC: Summit discusses use of legal highs in Scotland

But he cautions that doctors need to "think twice, and even three times" before prescribing the drugs in kids, for whom the long-term efficacy, as well as the long-term risk, is unknown.

FORBES: Pharmaceuticals

Difficulties that everyday citizens (and voters) have with evaluating the merits of the most well-known financial services firms are multiplied when the challenge is to form a judgement on the long-term value provided by unknown, entrepreneurial firms who engage in financial transactions that are far removed from their own everyday lives.

FORBES: "Villains" of Financial Crisis Wrestle with Misperceptions

The biggest winner in biotech last month was KV Pharmaceuticals, a heretofore unknown drug maker whose new drug to treat pre-term birth was approved but the Food and Drug Administration on Feb. 4.

FORBES: Biotech Busts And Breakthroughs For February

Given the unknown depth, and length, of the recession, none of these stocks is a place to park money short term.

FORBES: Magazine Article