Editor's note: The following are questions received from viewers of "Mad Money," seen every day at 6 p.m. EDT on CNBC.

What do you think about Walgreen (WAG) as a short- or long-term investment?-- Mike from Texas

James J. Cramer:

In my opinion, this company is the best of breed in the drug retail business. With that in mind, it's no surprise to me that Walgreen has chosen

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UnitedHealth Group

(UNH) - Get UnitedHealth Group Incorporated Report

, another industry leader, to partner with for the new Medicare health plan. (Note: Cramer owns UnitedHealth Group for his

ActionAlertsPLUS charitable trust.)