Which prescription medication's 1997 TV campaign is widely credited with transforming pharmaceutical marketing by pioneering direct-to-consumer advertising in the US?

The medical industry has seen numerous innovative marketing campaigns that have changed how prescription medications are promoted and distributed. One campaign in particular revolutionized direct-to-consumer advertising in the pharmaceutical world, opening the floodgates for prescription drug marketing to the general public. Test your knowledge of this pivotal moment in medical marketing history!

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Claritin (loratadine)
Viagra (sildenafil)
Prozac (fluoxetine)
Lipitor (atorvastatin)