Which packaging innovation was specifically developed in the 1980s to solve medication timing issues for transplant patients and is credited with significantly improving medication adherence?

Pharmaceutical packaging has evolved dramatically over the decades, with innovations that not only preserve medication efficacy but also enhance patient safety and compliance. One particular packaging breakthrough revolutionized how certain critical medications are delivered and used, saving countless lives through its ingenious design. Test your knowledge about this significant medical packaging innovation that changed healthcare delivery forever.

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Blister packs with day-of-week labeling
Child-resistant safety caps
Cyclosporine unit-dose packaging with time indicators
Temperature-sensitive vaccine vials