What is a green round pill that says k8?

Not Medical Advice: A green round pill that is imprinted with K8 or K 8 is oxycodone hydrochloride 15 mg. Oxycodone is used in treating pain and is a Schedule II narcotic analgesic. It is currently one of the most widely abused prescription drugs in the United States. It is manufactured under the brand names OxyContin, Oxyfast, Roxicodone, and others. Common side effects of oxycodone include nausea, vomiting, dizziness, constipation, headache, loss of appetite, fatigue, dry mouth, itching, and sweating.

Wednesday, February 01 2012
Source: http://www.drugs.com/imprints/k-8-15463.html