Not according to a new econometric study that concludes no more than 20% of existing coal generation is likely to switch over to gas, even if the Environmental Protection Agency drives up the cost of coal generation and gas prices stay at their current, low rates indefinitely.

FORBES: Frack Gas Not Likely To Displace King Coal, Study Suggests

In order to guard against the generics, Forest is trying to switch patients from Celexa to Lexapro, which still has years of patent protection.

FORBES: Magazine Article

That leads to another potential upside for Merck: It could switch patients from Zocor to a Zocor-Zetia combination pill before Zocor loses patent protection in 2006.

FORBES: Merck And Schering-Plough's Zetia OK'd

When a drugmaker introduces a "new and improved" version of an old pill about to lose patent protection, it usually stops marketing the older one and makes an allout attempt to get doctors to switch to the new version.

FORBES: Pills and Poker