Supply and demand.

Wikipedea describes supply and demand as “market relations between prospective sellers and buyers of a good. The supply and demand model determines price and quantity sold in the market.” Most student that have taken an economics course view a free market economy as a good thing and recognize that supply and demand forces naturally reaches an equilibrium. When demand for a product rises, the sellers will be able to demand higher prices for the same product.

An argument can be made that in the case of Thalidomide, demand is highly inelastic. Rather than suffer with the effects of cancer, cancer patients will pay almost anything for the drug. From this point of view, raising the price from $6 to $29 can be considered highly unethical.
However, Thalidomide is not the only drug that is effective in treating cancer, and among it's competition it one of the cheaper drug available for cancer treatment. Should Celgene management strategy of raising prises be considered unethical when it sells it's product for less than it's competitors?

Celgene has an obligation towards it shareholders. This obligation is purely financial. After posting losses for a number of years, it's moral obligation to it's shareholders is to turn the company around. Unfortunately this includes tactices such as raising the prices of Thalidomide.

Web source
“http://en.wikipedia.org/wiki/Supply_and_demand”