Better Buy: Gilead Sciences, Inc. (GILD) vs. Pfizer (PFE)

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Gilead Sciences (NASDAQ: GILD) and Pfizer (NYSE: PFE) face different challenges -- but there is some similarity. Gilead is trying to prove that it can return to growth despite falling sales for its blockbuster hepatitis C virus (HCV) franchise. Pfizer is attempting to move past the weight on revenue resulting from older drugs that have lost patent exclusivity.

Neither stock has performed well over the last three years: Gilead's share price dropped 25%, while Pfizer stock increased by only 4% during the period. But which of these two drug stocks is the better buy now for long-term investors? Here's how Gilead Sciences and Pfizer compare in several key areas.

Man facing arrows on wall pointing left and right
Man facing arrows on wall pointing left and right

Image source: Getty Images.

Current products

The bad news for Gilead is that its HCV franchise sales continue to slide. Although sales for newer HCV drugs Epclusa and Vosevi are increasing strongly, it isn't nearly enough to offset declines for Harvoni and Sovaldi. Still, Gilead CEO John Milligan stated earlier this year that "the market dynamics for HCV are stabilizing" and that HCV revenue "should be a more predictable, albeit smaller, piece of [Gilead's] financial story."

Gilead's good news is that its HIV franchise is performing well. The biotech claimed seven blockbuster HIV drugs on the market last year. Sales for Genvoya, Descovey, and Odefsey soared. Even better, Gilead now has new HIV therapy Biktarvy, which is probably the single most important drug for Gilead's immediate future. Analysts project peak annual sales for Biktarvy of close to $6 billion.

Outside of its antiviral drugs, Gilead has several other products that combined for $2.3 billion in sales last year, with pulmonary arterial hypertension drug Letairis leading the pack. Thanks to its acquisition of Kite Pharma, Gilead also has a promising CAR-T therapy with Yescarta. Although the launch of the drug has been slow due to complexities involved with the process for delivering CAR-T treatment, Yescarta could reach peak annual sales of around $2.7 billion.

It's a good news/bad news story for Pfizer also. Sales for the big pharma company's older products, including Enbrel and Viagra, are slipping. In addition, Pfizer has faced challenges from product shortages and technical issues with its sterile injectables business.

On the other hand, Pfizer's current lineup includes several big winners. Eliquis, an anticoagulant that Pfizer co-markets with Bristol-Myers Squibb, continues to enjoy strong sales momentum. Cancer drug Ibrance and arthritis drug Xeljanz are two of the company's rising stars. Pfizer's acquisitions over the last couple of years have also given the company new growth drivers like prostate cancer drug Xtandi and eczema drug Eucrisa.