Not Medical Advice: The pill imprint "K 56" belongs to Oxycodone Hydrochloride (10 mg). It is a pink and round pill with a line that divides the "K" and "56" imprints on one side.
Oxycodone is an opioid pain medication. The extended-release form of this medication is for around-the-clock treatment of pain, but the extended-release form is not for use on an as-needed basis for pain.
Oxycodone may be habit forming and may cause breathing problems, or addiction and withdrawal symptoms in your newborn if you take the medication during pregnancy. Its abuse has been a continuing problem in the United States since the early 1960's.
U.S. health regulators announced recently that they will not approve any generic versions of the original form of OxyContin. At the same time, the Food and Drug Administration also approved new labeling for a reformulated OxyContin, which was introduced by privately held manufacturer Purdue Pharma L.P. in 2010. The FDA approved the original formulation of OxyContin in 1995. In April of 2010, the FDA approved a reformulated version of OxyContin, designed to resist abuse.