Based on the search results, a Perc 30 is a semi-synthetic opioid that contains 30 milligrams of oxycodone without acetaminophen. It is not a prescription medication and is not recognized by medical professionals. The term "Perc 30" is a street name used to refer to counterfeit pills that are made to look like oxycodone pills but may contain other substances, such as fentanyl. These counterfeit pills are often sold illegally and can be extremely dangerous, as they may contain unknown and potentially lethal substances. It is important to note that the use of opioids, including Percocet and other prescription medications, can be highly addictive and can lead to serious health consequences.