512 Pill: What Is It?

Oxycodone hydrochloride 5 mg — a white, round Schedule II prescription opioid used for moderate to severe pain.

What Is the 512 Pill?

The round white tablet imprinted with 512 contains oxycodone hydrochloride 5 mg. It is manufactured by Mallinckrodt Pharmaceuticals and classified as a Schedule II controlled substance under the Controlled Substances Act — a category reserved for drugs with a high potential for abuse that may lead to severe psychological or physical dependence.

Oxycodone is a semisynthetic opioid analgesic derived from thebaine, a naturally occurring compound found in the opium poppy. When prescribed and used appropriately, it is an important tool for managing pain that other medications have failed to adequately control.

How to Identify the 512 Tablet Visually

If you have a pill and want to verify it matches the known description of the 512 oxycodone tablet, check for the following physical characteristics:

• Color: White
• Shape: Round, biconvex (slightly domed on both faces)
• Imprint: "512" on one face; the reverse side typically has a score (dividing line)
• Size: Approximately 7–8 mm in diameter
• Surface: Smooth; may be lightly film-coated

Visual identification alone cannot confirm that a pill is genuine. Illicitly manufactured counterfeit pills are designed to match the appearance of legitimate pharmaceuticals. Only a licensed pharmacist can confirm identity with certainty using reference databases and professional tools.

What Is Oxycodone Used For?

Oxycodone is prescribed by licensed clinicians for the management of pain that is:

• Moderate to severe in intensity
• Acute (such as post-surgical or trauma-related pain)
• Chronic and inadequately controlled by non-opioid therapies
• Related to cancer or serious medical conditions

How Does Oxycodone Work?

Oxycodone binds to mu-opioid receptors located throughout the brain, spinal cord, and peripheral tissues. Activation of these receptors reduces the brain's perception of pain signals and alters the emotional response to pain. Oxycodone also affects the limbic system, which contributes to feelings of sedation and well-being that can reinforce its abuse potential.

Risks, Warnings, and Drug Interactions

Because oxycodone is a Schedule II opioid, it carries serious risks that all patients and caregivers should understand:

• Respiratory depression: Opioids slow the rate and depth of breathing. An overdose can cause breathing to stop entirely, which is rapidly fatal without intervention.
• Addiction and dependence: Physical dependence can develop even with therapeutic use. Tolerance and psychological addiction are also possible.
• Dangerous combinations: Combining oxycodone with benzodiazepines (such as Xanax, Valium, or Klonopin), alcohol, muscle relaxants, or other CNS depressants greatly multiplies the risk of fatal respiratory depression.
• Naloxone (Narcan): People taking opioids or who live with someone who does should discuss naloxone availability with their pharmacist. It is a life-saving overdose-reversal medication available without a prescription in many US states.

Is the 512 Pill the Same as Percocet?

No. Percocet is a brand-name combination product containing both oxycodone and acetaminophen. The 512 tablet contains oxycodone only — there is no acetaminophen in this formulation. This distinction is clinically important: patients need to track their total acetaminophen intake from all products to avoid exceeding safe limits, which can cause liver damage.

Frequently Asked Questions