Final answer:
Oxycodone primarily targets the μ-opioid receptor, providing pain relief similarly to morphine and heroin but with a high potential for abuse.
Step-by-step explanation:
Oxycodone, used to relieve moderate to severe pain, primarily works on the μ-opioid receptor (mu-opioid receptor), which is also targeted by other opioids like morphine and heroin. By binding to these receptors, oxycodone mimics the effects of endogenous opioids, alleviating pain and potentially producing euphoria. Due to its potent analgesic effects, oxycodone carries a high potential for abuse and dependence, thus it is classified as a controlled substance and prescribed with caution.