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Hydrocodone/Acetaminophen Pills: How to Identify Yours by Imprint
Medically reviewed by Alan Lucks | MD , Alan Lucks MDPC Private Practice - New York on June 12th, 2025. Published on June 12th, 2025. Updated on May 27th, 2026.
Key Takeaways
Common combinations include 5mg/325mg, 7.5mg/325mg, and 10mg/325mg tablets, with the first number representing hydrocodone and second representing acetaminophen in milligrams.
Pills display unique imprint codes like "M367" (10mg/325mg white oblong), "Watson 853" (10mg/325mg yellow oblong), or "IP 109" (5mg/325mg white oblong) that identify exact formulation and manufacturer.
Acetaminophen overdose occurs at doses above 4,000mg daily and can cause irreversible liver damage within 24-48 hours, even if the hydrocodone amount seems safe.
Counterfeit versions often lack proper imprints, have inconsistent coloring, or crumble easily—legitimate pharmaceuticals have precise, sharp markings and uniform appearance.
Physical dependence can develop within 5-7 days of regular use, with withdrawal symptoms including muscle aches, nausea, and anxiety beginning 6-12 hours after the last dose.
Hydrocodone pills are small, oval or round tablets — usually white, yellow, or light blue — with imprint codes that tell you the dose and manufacturer. The most common form combines hydrocodone with acetaminophen (brands like Norco, Vicodin, and Lortab). This guide explains exactly what to look for so you can identify your pill with confidence.
Understanding Hydrocodone and Acetaminophen
Hydrocodone is an opioid pain reliever, while acetaminophen is a non-opioid analgesic. Together, they work synergistically to alleviate pain. This combination is frequently prescribed for conditions such as post-surgical pain, injury-related pain, and chronic pain management.
The dual-action approach not only effectively manages acute pain but also plays a crucial role in improving the overall quality of life for patients suffering from chronic conditions.
In addition to their pain-relieving properties, hydrocodone and acetaminophen can also contribute to reducing anxiety associated with severe pain.
Patients often experience not just physical discomfort but also emotional distress, which can hinder recovery.
By addressing both the physical and emotional aspects of pain, this combination therapy can foster a more holistic approach to pain management, allowing patients to engage more fully in their recovery process.
Mechanism of Action
Hydrocodone functions by binding to opioid receptors in the brain, altering the perception of pain. In contrast, acetaminophen works primarily in the brain to reduce fever and alleviate pain.
The combination of these two medications can provide enhanced pain relief compared to either medication alone.
The synergistic effect is particularly beneficial for patients who may not respond adequately to either drug on its own, thus expanding the options available for effective pain management.
Moreover, the pharmacokinetics of hydrocodone and acetaminophen allow for a more sustained release of pain relief.
Hydrocodone has a relatively long half-life, which means it can provide prolonged analgesia, while acetaminophen can help to maintain a consistent level of pain relief throughout the day.
This is particularly advantageous for patients who require continuous pain control, such as those recovering from major surgeries or managing chronic pain conditions.
Common Brand Names
Vicodin
Lortab
Norco
These brand names may vary by manufacturer, but they all contain a combination of hydrocodone and acetaminophen in different strengths.
It's important for patients to be aware of the specific formulation they are prescribed, as the ratio of hydrocodone to acetaminophen can significantly impact both efficacy and safety.
For instance, higher doses of acetaminophen can lead to liver toxicity, particularly in patients who may consume alcohol or have pre-existing liver conditions.
Additionally, healthcare providers often monitor patients closely when prescribing these medications due to the potential for dependency and misuse associated with opioids.
Education on the proper use of these medications, including adherence to prescribed dosages and awareness of side effects, is essential in ensuring safe and effective pain management.
Patients are encouraged to communicate openly with their healthcare providers about their pain levels and any concerns regarding their medication regimen.
Physical Characteristics of Hydrocodone & Acetaminophen Pills
Identifying hydrocodone and acetaminophen pills can be challenging due to the variety of shapes, colors, and imprints. Each pill is uniquely designed to help patients and pharmacists identify the medication quickly.
Shapes and Colors
Hydrocodone and acetaminophen pills come in various shapes, including:
Round
Oval
Rectangular
Depending on the manufacturer and specific formulation, colors can range from white to yellow, blue, or green.
The color and shape not only serve as identifiers but can also influence patient compliance; some patients may prefer one form over another based on ease of swallowing or personal preference.
For instance, oval pills may be perceived as easier to swallow compared to larger rectangular ones, which can be particularly important for patients with swallowing difficulties.
Imprints and Markings
Every FDA-approved pill has a unique imprint — the key to accurate identification. Hydrocodone/acetaminophen imprints typically encode the manufacturer, strength, and a unique ID number. Common examples include:
IP 110 — hydrocodone 10 mg / acetaminophen 325 mg (white, oval)
M367 — hydrocodone 10 mg / acetaminophen 325 mg (white, capsule-shaped)
NORCO 539 — hydrocodone 7.5 mg / acetaminophen 325 mg (yellow, oval)
V 3601 — hydrocodone 10 mg / acetaminophen 325 mg (yellow, oval)
These hydrocodone markings are the most reliable way to confirm what you have. To verify any imprint, use the FDA's pill identifier at pillbox.nlm.nih.gov or ask your pharmacist.
In cases of prescription errors or potential misuse, the imprints can help healthcare professionals quickly ascertain whether the medication is appropriate for the patient’s needs.
Furthermore, the FDA mandates that all prescription medications have unique identifiers to prevent confusion and enhance traceability, ensuring that patients receive the correct treatment.
What Does Norco Look Like? Brand-by-Brand Visual Guide
Many people search for a specific brand name when trying to identify their pill. Here's what the most common hydrocodone/acetaminophen brands actually look like.
Norco
Norco tablets are typically yellow or white and oval-shaped. The yellow version (7.5 mg / 325 mg) is one of the most recognized — it's imprinted with "NORCO 539" on one side. The 10 mg / 325 mg strength is also yellow with a "NORCO 729" imprint. White Norco pills (5 mg / 325 mg) carry the imprint "NORCO 355." The color difference makes dose verification easier at a glance.
Vicodin
Vicodin tablets are white and capsule-shaped (oblong). The 5 mg / 300 mg strength is imprinted "VICODIN" on one side and is slightly smaller than higher-dose versions. Vicodin ES (7.5 mg / 300 mg) and Vicodin HP (10 mg / 300 mg) share the same white, oblong appearance but have different imprint numbers. Always check both sides of the pill.
Lortab
Lortab comes in white, pink, or blue oval tablets depending on the strength. The 5 mg / 325 mg version is typically white; the 7.5 mg version may appear light pink; and the 10 mg version is often blue. Each is scored on one side so it can be split, and all carry an "UCB" imprint along with the dose.
Generic hydrocodone/acetaminophen tablets
Most prescriptions today are filled with generics. These can be nearly any color — white, yellow, blue, peach, or green — and come from dozens of manufacturers. This is why the imprint code matters more than color alone. Two pills can look similar but have very different doses.
A quick rule of thumb: color and shape narrow the field, but the imprint code is the definitive identifier. If your pill doesn't match what you expect, don't take it — contact your pharmacist before proceeding. Our AI doctor can also help you think through next steps if you're unsure about a medication you've been prescribed.
How to Identify Your Pill
Identifying a specific hydrocodone and acetaminophen pill can be straightforward if you know where to look. Here are steps to help you accurately identify your medication.
Using Online Resources
Several online pill identification tools can assist in identifying medications based on their physical characteristics. Users can input details such as:
Color
Shape
Imprint
These tools can provide a list of potential matches, making it easier to confirm the pill's identity.
Additionally, many of these websites also offer information about the medication's uses, side effects, and interactions with other drugs, providing a comprehensive resource for users.
It’s important to ensure that the website you are using is reputable and up-to-date, as medication information can change over time.
Consulting with a Pharmacist
If online resources are unavailable or if there are still uncertainties, consulting with a pharmacist is a reliable option. Pharmacists are trained to identify medications and can provide valuable information regarding dosage and usage.
They can also help clarify any concerns about the medication's effects, potential side effects, and the importance of adhering to the prescribed regimen. Moreover, pharmacists often have access to databases that may not be available to the public, allowing them to offer insights on less common medications or formulations.
In addition to identifying pills, pharmacists can also assist in medication management. If you have multiple prescriptions, they can help you understand how to take them safely together, ensuring that you avoid any harmful interactions.
This personalized guidance can be particularly beneficial for individuals managing chronic conditions or those who may be taking multiple medications simultaneously.
Dosage Information
Hydrocodone and acetaminophen pills come in various dosages, which are essential for ensuring effective and safe pain management. Understanding these dosages can help prevent accidental overdose or undertreatment of pain.
The combination of these two medications is often prescribed for moderate to severe pain, and the specific dosage is tailored to the individual’s medical history, pain level, and response to treatment.
It is important for patients to communicate openly with their healthcare provider about their pain management needs and any side effects they may experience.
Common Dosage Forms
Vicodin- Hydrocodone 5mg
Acetaminophen 500mg
Lortab- Hydrocodone 10mg
Acetaminophen 500mg
Norco- Hydrocodone 7.5mg
Acetaminophen 325mg
It is crucial to follow the prescribed dosage and not to exceed the recommended limits, as both hydrocodone and acetaminophen have potential risks when misused.
Acetaminophen, in particular, can lead to severe liver damage if taken in excessive amounts, while hydrocodone can be habit-forming, leading to dependency and addiction.
Patients should also be aware of other medications they are taking that may contain acetaminophen, as this can inadvertently lead to exceeding the safe daily limit.
Signs of Overdose
Recognizing the signs of an overdose is vital for anyone taking hydrocodone and acetaminophen. Symptoms may include:
Extreme drowsiness or lethargy
Confusion
Slow or difficult breathing
Unresponsiveness
If an overdose is suspected, it is critical to seek emergency medical attention immediately. In addition to the physical symptoms, individuals may also experience a sense of impending doom or anxiety, which can be alarming.
It’s important for family members and caregivers to be educated about these symptoms, as they may be the first to notice changes in a person's condition.
Furthermore, having access to naloxone, an opioid antagonist, can be a lifesaving measure in the event of an overdose, as it can quickly reverse the effects of hydrocodone if administered promptly.
Safety Considerations
While hydrocodone and acetaminophen can be effective for pain management, important safety considerations must be considered. Understanding these can help ensure safe usage and minimize risks.
Potential Side Effects
Both hydrocodone and acetaminophen can cause side effects, some of which may be serious. Common side effects include:
Nausea and vomiting
Dizziness or lightheadedness
Constipation
More severe side effects may include allergic reactions, liver damage (from acetaminophen), and respiratory depression (from hydrocodone).
Patients must monitor their bodies for any unusual symptoms and seek medical attention if they experience severe side effects.
Additionally, prolonged use of these medications can lead to dependence, which is a significant concern for both patients and healthcare providers.
Regular follow-ups with a healthcare professional can help mitigate these risks and ensure that the treatment plan remains safe and effective.
Drug Interactions
Certain medications can interact with hydrocodone and acetaminophen, potentially increasing the risk of side effects or reducing effectiveness. Important interactions to be aware of include:
Other central nervous system depressants (e.g., benzodiazepines)
Alcohol
Medications that affect liver function
Always inform healthcare providers about all medications being taken to avoid harmful interactions. It is also wise to discuss any over-the-counter supplements or herbal remedies, as these can also pose risks when combined with prescription medications.
For example, St. John's Wort, commonly used for depression, can significantly alter the metabolism of certain drugs, leading to either increased side effects or reduced pain relief.
Being proactive about medication management can play a vital role in ensuring patient safety and optimizing therapeutic outcomes.
Storage and Disposal
Proper storage and disposal of hydrocodone and acetaminophen pills are essential to prevent misuse and accidental ingestion, especially in households with children or pets.
Storage Guidelines
It is recommended that these medications be stored in a cool, dry place away from direct sunlight and moisture. To avoid confusion, they should be kept in their original containers with labels intact.
Additionally, consider using a locked cabinet or a high shelf to further minimize the risk of access by children or pets. Regularly check the storage area for any expired medications and ensure that the environment remains suitable for preserving the integrity of the pills.
Safe Disposal Methods
When it comes to disposing of unused or expired medications, consider the following methods:
Take-back programs: Many pharmacies and community organizations offer medication take-back events, which are often held during designated days or weeks. These programs provide a safe and environmentally friendly way to dispose of medications, as they ensure proper handling and destruction.
Disposal in household trash: If no take-back options are available, mix the medication with an undesirable substance (like used coffee grounds) and place it in a sealed container before discarding it. This method not only makes the medication unpalatable but also helps prevent accidental ingestion by children or pets.
Flushing: Only flush medications down the toilet if the label specifically instructs you to do so. Flushing is recommended for certain medications that pose a higher risk of harm if ingested accidentally, as it ensures they are quickly removed from circulation.
Moreover, it is important to educate family members about the risks associated with improper medication storage and disposal.
Discussing these practices can foster a culture of safety within the home, encouraging everyone to take responsibility for their health and the health of others.
Consider creating a checklist for regular medication audits, which can help ensure that all medications are accounted for and disposed of properly when no longer needed.
Identifying Hydrocodone and Acetaminophen Pills with Confidence Powered by Doctronic
Identifying hydrocodone and acetaminophen pills correctly is crucial for ensuring safe and effective pain management. In this article, we explored how to recognize these medications based on appearance, imprints, dosage, and potential side effects.
We also emphasized the importance of using trusted resources and following safety guidelines to prevent misuse or accidental errors.
For those needing extra support, Doctronic, the #1 AI Doctor, offers free AI-powered medical consultations that help users identify medications, assess symptoms, and provide instant, personalized insights. This AI-generated guidance can then be shared with healthcare providers for further confirmation and care.
Frequently Asked Questions
Hydrocodone/acetaminophen pills are typically small, oval or oblong tablets in white, yellow, blue, or peach. The exact appearance depends on the manufacturer and strength. The most reliable identifier is the imprint code stamped on each pill — for example, M367 (white, capsule-shaped, 10 mg/325 mg) or NORCO 539 (yellow, oval, 7.5 mg/325 mg).
Enter the imprint code, color, and shape into a reputable pill identifier tool such as the one at pillbox.nlm.nih.gov or drugs.com/pill_identification.html. These databases cross-reference FDA records and will show you the medication name, strength, and manufacturer. If you still aren't certain, your pharmacist can confirm the identity in seconds.
Norco tablets are oval and come in yellow or white depending on the dose. The 5 mg / 325 mg strength is white (imprint: NORCO 355), the 7.5 mg / 325 mg is yellow (imprint: NORCO 539), and the 10 mg / 325 mg is also yellow (imprint: NORCO 729). Color alone isn't enough — always confirm the imprint matches your prescription label.
Yes — this is a common source of confusion. Different manufacturers may produce pills that look similar in color and shape but contain different amounts of hydrocodone or acetaminophen. Always verify the imprint code against your prescription label or a trusted pill identifier, and never assume dose based on appearance alone.
Don't take it. Contact your pharmacist right away — they can check whether the pill is correct or if there was a dispensing error. You can also use an online pill identifier to double-check the imprint. If you're unsure and can't reach a pharmacist, our AI doctor can help you figure out your next step.
The Bottom Line
Always verify pill identity using the specific imprint code rather than just appearance, since multiple medications can look similar but contain vastly different active ingredients. Never take unidentified pills or those without proper pharmaceutical markings. If you're experiencing concerning symptoms after taking any medication, Doctronic can help you assess your situation quickly.
