Very long term monthly chart of MRK. Currently attempting to break the large declining tops line. Formed a nice double bottom off of long term support. Working on a fifth straight month of gains, hasn't done this since 94/95.
Longer term, this type of price action is encouraging. Heavy resistance may come into play in the 42 range. However, the heavy volume in the late 04 sell-off may have cleared out some of that supply.
The stock still pays about a 4% dividend.
The company appears to be handling the recent litigation issues fairly well also.
Disclosure: I have long term holdings in this stock.