I found a bottle with a few capsules in my son's car and would like help identifying them. They are small white and yellow capsules Ethex on the yellow end and 041 on the white end. A neighbor suggested they were Oxycontin 5mg IR. Can anybody verify this for me, please. I am very worried about my son's involvement with drugs, and need to know if he's using narcotics. Thank you in advance for any information you may provide.