Which pharmaceutical packaging innovation was first introduced in the 1960s specifically to help patients track their medication schedule and improve adherence?

Pharmaceutical packaging design has evolved dramatically over the decades to address safety, compliance, and usability concerns. One innovation in particular transformed how medications are dispensed and tracked. Test your knowledge about this significant packaging advancement that changed how patients interact with their medications and how healthcare providers monitor adherence.

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Calendar blister packs with days of the week printed on each pill cavity
Tamper-evident bottle seals with color-changing indicators
Child-resistant push-down-and-turn caps
Single-dose prefilled syringes with retractable needles