Which pharmaceutical product became the first to reach annual sales of $1 billion (achieving 'blockbuster' status) and revolutionized how medications were marketed directly to consumers?

The pharmaceutical industry has seen numerous breakthroughs that have not only saved lives but transformed business models. Understanding the market trends and corporate histories behind these medical innovations reveals how certain products redefined entire therapeutic categories and company trajectories. This trivia question explores one of the most significant product success stories in pharmaceutical history that altered industry marketing strategies forever.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Lipitor (atorvastatin) by Pfizer for cholesterol management
Prozac (fluoxetine) by Eli Lilly for depression
Viagra (sildenafil) by Pfizer for erectile dysfunction
Prilosec (omeprazole) by AstraZeneca for acid reflux