K 57 Pill – gray round, 6mm k57 Gray Oxycodone 20mg- Round and has been identified as Oxycodone Hydrochloride 20 mg. It is supplied by KVK Tech Inc. Oxycodone is used in the treatment of chronic pain; pain and belongs to the drug class Opioids (narcotic analgesics). FDA has not classified the drug for risk during pregnancy. Oxycodone 20 mg is classified as...