Which pharmaceutical company first introduced color-coded pill branding to help patients distinguish between different dosage strengths of the same medication?

In the medical industry, pharmaceutical branding plays a crucial role in product recognition, trust, and market differentiation. Companies invest millions in developing distinctive visual identities that healthcare professionals and patients can easily recognize. This poll tests your knowledge about the origin of a famous medication's brand identity that revolutionized pharmaceutical marketing.

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Pfizer with Lipitor (atorvastatin)
GlaxoSmithKline with Paxil (paroxetine)
AstraZeneca with Prilosec/Nexium (omeprazole/esomeprazole)
Eli Lilly with Prozac (fluoxetine)