Oxycodone (no, not oxycodeine, as that doesn't exist) is an opiate analgesic with similar strength to morphine
HCl is Oxycodone Hydrochloride, or the salt, which is suitable for ingestion, injection, insuffulation, whatever you prefer. CL stands for controlled release, which is commonly known as a "Contin", as in OxyContin, MS-Contin, etc. So, what you have my friend, is 10 mg. Controlled Release Oxycodone Hydrochloride. OxyContin, or a generic equiv.