Urgentrx.

• Author: Peterson, Eric
• Position: Small biz COLORADO COOL STUFF

Engineer/entrepreneur Jordan Eisenberg has made a mark for himself in the credit card-sized product market: Since 2009, he launched the Collar Card (credit-card-sized collar stays) and the Bottle Card (a credit card-sized bottle opener). In 2011, he's moved into medicine with credit card-sized doses of aspirin and pain reliever dubbed UrgentRx.

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"It's single-dose emergency medicine in the shape of a credit card," Eisenberg says, noting that aspirin increases the survival rate of heart attack victims by 23 percent. "You just slip it in your wallet or purse. You don't need water." And...