Which medical product innovation was initially developed as an anti-hypertensive medication but became revolutionary in an entirely different therapeutic area after researchers noticed an unexpected side effect?

The pharmaceutical and medical device industries are constantly evolving with breakthrough innovations that change patient care forever. Sometimes, these innovations result from years of research while others come from unexpected discoveries. This poll tests your knowledge about a significant product innovation in medicine that transformed treatment paradigms and created entirely new therapeutic categories.

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Sildenafil (Viagra), which was repurposed for erectile dysfunction after researchers noticed this side effect in blood pressure medication trials
Minoxidil (Rogaine), which was originally developed as a blood pressure medication but became a hair growth treatment
Botulinum toxin (Botox), which was initially studied for hypertension but found applications in cosmetic and neurological treatments
Finasteride (Propecia), which began as a cardiovascular drug but was repurposed when researchers observed hair regrowth patterns