Oxycontin 5 mg pills are release tablets that also have an active ingredient oxycodone hydrochloride. It is a prolonged-release tablet that also contains lactose monohydrate. Oxycontin 5 mg pills can cause side effects that include drowsiness, sleepiness or dizziness in some people. You should avoid driving or operating machinery until you know how it affects you.  Medicine Oxycontin 5 mg is legitimately prescribed for the relief of moderate to severe pain resulting from injuries, bursitis, neuralgia, arthritis and cancer. OxyContin for the treatment of non–non-cancer-related pain contributed to a nearly tenfold increase in OxyContin prescriptions for this type of pain, from about 670,000 in 1997 to about 6.2 million in 2002. In contrast, prescriptions for cancer-related pain increased about fourfold during that same period.