See related story: Viagra Tag Could Be Bitter Pill
Slideshow: Viagra Tag Could Be Bitter Pill
As radio-frequency tracking chips pop up on bottles of impotency drugs and painkillers, privacy watchdogs say consumers could end up taking the tags home. By Randy Dotinga.
This tiny vial contains 150 RFID chips manufactured by Alien Technology Corporation. Each tiny chip measures just .35 mm square.Photo: Katherine Albrecht

