Which medication had the fastest product launch to reach $1 billion in annual sales (becoming a 'blockbuster drug') and revolutionized treatment for Hepatitis C with a >90% cure rate?

The pharmaceutical industry invests heavily in product launches, with some medications becoming instant blockbusters while others struggle to gain traction. A successful product launch in medicine requires careful timing, strategic marketing to healthcare professionals, and awareness of regulatory constraints. This trivia question tests your knowledge of one of the most successful pharmaceutical product launches in history, which transformed both patient outcomes and industry expectations.

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Sovaldi (sofosbuvir) - launched in 2013, reached $1B within just 3 months
Lipitor (atorvastatin) - launched in 1996, reached $1B within 9 months
Humira (adalimumab) - launched in 2002, reached $1B within 6 months
Keytruda (pembrolizumab) - launched in 2014, reached $1B within 5 months