These blue chip healthcare stocks could still deliver strong long-term returns.

Dividend stocks are a great investment choice for many reasons. Buying on the dip is even better, provided, of course, they have the means to bounce back.

Investors looking for companies that fit this profile should strongly consider Pfizer ( PFE 0.22% ) and Merck ( MRK 1.86% ) . These two market leaders have lagged broader equities over the trailing-12-month period, but for those focused on the long game, they still look attractive. Here's the rundown.

1. Pfizer

Over the past few years, Pfizer has dealt with worsening financial results and stiff competition for some products. It also faces the prospect of losing patent protection for others; these include Eliquis, an anticoagulant that is o

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