In 2012, AbbVie's (NYSE:ABBV) Humira brought in $9.3 billion in total sales and was the best selling drug in the world. But did the autoimmune disease drug, which accounts for more than half of AbbVie's sales, keep its crown in 2013?

In the following slideshow, we reveal last year's three best-selling drugs. Blockbusters from powerhouses Amgen (NASDAQ:AMGN), Pfizer (NYSE:PFE), Johnson & Johnson (NYSE:JNJ), and Merck (NYSE:MRK) all made the list.

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Max Macaluso, Ph.D., has no position in any stocks mentioned. The Motley Fool recommends Johnson & Johnson. The Motley Fool owns shares of Johnson & Johnson. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.