But this time his company is too small to buy a titan like Merck, and the joint venture could discourage buyers:It contains a "poison pill" clause that gives Merck the right to buy Schering-Plough's share of the partnership if Schering-Plough is acquired.

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Anderson advises investors to buy Pfizer shares based on the new drugs the company is developing, including a rheumatoid arthritis pill.

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The company also created smaller pill packets and asthma inhalers for people who couldn't afford to buy a full month's supply at a time.

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