Patients can get a refund on unused Vioxx by mailing back the remaining drug in the original container, along with a pharmacy receipt, to: NNC Group, Merck Returns, 2670 Executive Dr., Indianapolis, IN 46241. A note with the patient's name, address and phone number should be included. The company will reimburse the cost of the full prescription plus regular shipping. More instructions and information are available through the Internet at www.vioxx.com and www.merck.com or by calling (888) 368-4699. Doctors are being asked to send back samples, and pharmacists will be contacted by Merck representatives on returning unsold inventory.