Which pharmaceutical product became the fastest to reach $1 billion in annual sales, achieving this milestone in just 9 months after its launch in 1997?

In the competitive world of medicine and pharmaceuticals, product launches can make or break a company's success. Major drug launches often involve years of research, clinical trials, and marketing strategy. This trivia question focuses on one of the most successful pharmaceutical product launches in history and the milestone it achieved. Test your knowledge of pharmaceutical industry achievements!

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Lipitor (atorvastatin) by Pfizer
Viagra (sildenafil) by Pfizer
Prozac (fluoxetine) by Eli Lilly
Celebrex (celecoxib) by Pharmacia