A pill stamped with the imprint “107” is most commonly a tablet of hydrocodone 7.5 mg combined with acetaminophen 325 mg, a prescription opioid painkiller used for moderate to severe pain. The identification depends on more than the number alone, though. Pill color, shape, and any additional markings all matter, because different manufacturers stamp “107” on other medications entirely, including the over-the-counter antihistamine cetirizine. Before taking any pill based solely on an imprint, confirming its full appearance against a verified drug-identification tool or a pharmacist’s guidance is the only safe approach.
What the 107 Pill Contains and Why It Is Prescribed
The most widely recognized version of the “107” pill is a white, capsule-shaped tablet containing two active ingredients: hydrocodone bitartrate at 7.5 mg and acetaminophen at 325 mg. Hydrocodone is a semisynthetic opioid that has been used for decades as a short-acting pain reliever, most often in combination with acetaminophen or, less frequently, ibuprofen.1PubMed Central. Extended-release hydrocodone – gift or curse? The acetaminophen component works through a different pain-relief pathway and allows the hydrocodone dose to stay lower than it would need to be on its own.
Doctors prescribe this combination for pain that is too intense for over-the-counter medicines but does not necessarily call for a stronger opioid like oxycodone or morphine. Common scenarios include post-surgical recovery, dental procedures, injury-related pain, and chronic pain conditions when other treatments have not been enough. Because the tablet contains an opioid, it is classified as a Schedule II controlled substance in the United States, meaning it requires a written prescription that cannot be called in or automatically refilled.
Why the Imprint Alone Is Not Enough to Identify a Pill
Pill imprints in the U.S. are assigned by individual manufacturers, and no central authority prevents the same number from appearing on completely unrelated medications. A round, white tablet marked “107” from one company could be cetirizine 10 mg, a second-generation antihistamine used for seasonal allergies and hives. Cetirizine works by blocking histamine receptors and has a completely different set of effects: it suppresses allergic symptoms like sneezing and itchy eyes, with its activity peaking around four to eight hours after a dose and lasting at least 24 hours.2Biomedical and Pharmacology Journal. A Review on Mechanism of Histamine Mediated Allergic Reactions: Therapeutic Role, Safety, and Clinical Efficacy of Cetirizine in Modern Allergy and Other Diseases Management – Section: Pharmacodynamic profile of Cetirizine Taking a cetirizine tablet when you expect a hydrocodone combination, or vice versa, would be at best ineffective and at worst dangerous. If you have an unidentified pill, note its shape, color, size, and every marking on both sides before looking it up.
How Hydrocodone-Acetaminophen Works Against Pain
Hydrocodone binds to opioid receptors in the brain and spinal cord, dampening the way your nervous system transmits and perceives pain signals. It also activates the brain’s reward circuits, which is why it can produce feelings of relaxation or mild euphoria and why it carries a risk of dependence. Acetaminophen adds to the pain relief through mechanisms that are still not entirely worked out but are thought to involve inhibition of certain enzymes in the central nervous system. Together, the two drugs complement each other: acetaminophen handles mild to moderate pain on its own, and the hydrocodone pushes the combined effect into territory strong enough for more severe pain.
The relief from a single dose typically begins within 20 to 40 minutes and lasts four to six hours, which is why prescriptions usually direct patients to take the tablet every four to six hours as needed. The “as needed” part matters. This is not a medication designed to be taken around the clock on a fixed schedule for most patients, though some chronic pain situations do involve scheduled dosing.
Dosage and the Acetaminophen Ceiling
For the 107 pill specifically, the standard adult dose is one or two tablets every four to six hours, depending on pain severity and the prescriber’s judgment. While opioids themselves do not have a single hard ceiling the way many drugs do, because dosing is escalated until adequate pain relief is reached or side effects become limiting, the acetaminophen in each tablet creates a practical maximum.3American Journal of Health-System Pharmacy. Maximum daily dose of hydrocodone Current guidelines generally cap total daily acetaminophen at 3,000 to 4,000 mg for adults, and lower for people who drink alcohol regularly or have any liver concerns.
At 325 mg of acetaminophen per tablet, taking eight tablets in a day would put you at 2,600 mg of acetaminophen, which is within the limit. But many people forget that acetaminophen is also in dozens of cold medicines, headache powders, and sleep aids sold over the counter. Stacking those products with a hydrocodone-acetaminophen prescription can push total daily acetaminophen intake well past the safety boundary without the person realizing it.
Why the Acetaminophen Component Deserves Separate Attention
The liver concern is not theoretical. Acetaminophen is one of the most common causes of acute liver failure in the developed world, and much of that damage happens from accidental overdoses rather than intentional ones. When the liver processes acetaminophen, it produces a reactive byproduct called NAPQI, which at normal doses gets neutralized quickly. At excessive doses, the liver’s ability to neutralize NAPQI is overwhelmed, and the resulting buildup triggers a cascade of damage to liver cells, starting with mitochondrial stress and ending in cell death.4PubMed Central. Mechanisms of acetaminophen hepatotoxicity and their translation to the human pathophysiology
The danger zone is closer than many people assume. Someone taking the maximum prescribed dose of the 107 pill while also taking a nighttime cold remedy that contains acetaminophen could cross the threshold without any single product exceeding its own label instructions. If you are prescribed a hydrocodone-acetaminophen combination, read the ingredient list on every other medication you take and look for acetaminophen, which sometimes goes by its chemical abbreviation APAP.
Common Side Effects
The side-effect profile falls into two camps: opioid-related effects from the hydrocodone and the general effects that come with any medication. In a trial comparing hydrocodone-acetaminophen to another opioid combination, the most frequently reported problems were constipation (about 29%), dizziness (about 19%), vomiting (about 16%), and dry mouth (about 18%).5Clinical Therapeutics. Codeine/acetaminophen and hydrocodone/acetaminophen combination tablets for the management of chronic cancer pain in adults: A 23-day, prospective, double-blind, randomized, parallel-group study In older adults specifically, side effects can hit harder: a study of patients over 60 found that roughly six in ten who took oral opioids for acute pain reported at least one side effect of moderate or severe intensity during the first week, with tiredness, nausea, and constipation topping the list.6PubMed Central. Side effects from oral opioids in older adults during the first week of treatment for acute musculoskeletal pain
Constipation is almost guaranteed with regular use and does not go away with time the way nausea and drowsiness sometimes do. The opioid slows the movement of your gut, and this effect does not build tolerance. Stool softeners or mild laxatives are often recommended from the start of therapy, not as an afterthought once constipation becomes uncomfortable.
Drowsiness and dizziness are especially relevant for anyone who drives or operates equipment. These effects are most pronounced during the first few days and when doses are increased. Nausea is another frequent complaint, particularly during the first several doses. Researchers have explored adding a low-dose anti-nausea drug directly into the tablet to combat opioid-induced nausea and vomiting.7PubMed. Prevention of Opioid-Induced Nausea and Vomiting During Treatment of Moderate to Severe Acute Pain: A Randomized Placebo-Controlled Trial Comparing CL-108 (Hydrocodone 7.5 mg/Acetaminophen 325 mg/Rapid-Release, Low-Dose Promethazine 12.5 mg) with Conventional Hydrocodone 7.5 mg/Acetaminophen 325 mg That particular combination has not become a standard prescription, but the research underscores how common the nausea problem is.
Dangerous Interactions
The single most important interaction to know about is with alcohol. Both alcohol and hydrocodone depress the central nervous system, which means they slow breathing, lower alertness, and reduce reflexes. Combining them multiplies those effects. Even a couple of drinks alongside a dose of the 107 pill can suppress breathing enough to become life-threatening. The same danger applies to benzodiazepines, which include drugs like alprazolam (Xanax), diazepam (Valium), and lorazepam (Ativan). Patients who use opioids alongside benzodiazepines or alcohol face a meaningfully higher risk of fatal and nonfatal overdose.8PubMed Central. Risks, management, and monitoring of combination opioid, benzodiazepines, and/or alcohol use
Other sedating medications also compound the risk. Muscle relaxants, certain antidepressants, sleep aids, and even some antihistamines can add to the sedation. If you are prescribed the 107 pill and already take any of these, your prescriber needs to know so they can adjust doses or monitor you more closely.
What to Do in an Overdose Situation
An overdose of hydrocodone-acetaminophen is a two-pronged emergency: the opioid suppresses breathing while the acetaminophen damages the liver. Signs of opioid overdose include extremely slow or shallow breathing, unresponsiveness, pinpoint pupils, and blue-tinged lips or fingertips. If you suspect an overdose, call emergency services immediately.
Naloxone (brand name Narcan) is the frontline reversal agent for the opioid component. It works by displacing hydrocodone from the opioid receptors, restoring normal breathing within minutes. Intranasal naloxone appears to work about as well as the injectable form for reversing overdose, and emergency guidelines now recommend either the intravenous or intranasal route.9PubMed. Management of Suspected Opioid Overdose With Naloxone in Out-of-Hospital Settings: A Systematic Review 10PubMed. Evidence-Based Guidelines for EMS Administration of Naloxone One important complication: naloxone wears off faster than hydrocodone does, so a person who seems to recover can slip back into respiratory depression once the naloxone clears. This re-narcotization risk is why medical observation after naloxone use is essential, not optional.11PubMed Central. Naloxone dosage for opioid reversal: current evidence and clinical implications
The acetaminophen side of an overdose does not produce immediately obvious symptoms. Liver damage from APAP can take 24 to 72 hours to become apparent, by which point the injury may be severe. The antidote is N-acetylcysteine, which works best when given within eight hours of the overdose. This is another reason to seek emergency care quickly rather than waiting to see if symptoms develop.
How Long It Shows Up on Drug Tests
Hydrocodone and its metabolites are detectable in urine for longer than the pain relief lasts, which matters for anyone facing workplace or legal drug screening. In controlled single-dose studies, hydrocodone itself was detectable at a standard 50 ng/mL cutoff for roughly 28 hours after a dose. Its primary metabolite, norhydrocodone, lasted about 40 hours, and hydromorphone (a minor metabolite the body produces from hydrocodone) was detectable for about 26 hours.12Journal of Analytical Toxicology. Prescription Opioids. II. Metabolism and Excretion Patterns of Hydrocodone in Urine Following Controlled Single-Dose Administration Norhydrocodone is found at higher levels and persists longer than the parent drug, making it a useful marker in toxicology for confirming that hydrocodone was the drug actually taken.13Journal of Analytical Toxicology. Excretion Profile of Hydrocodone, Hydromorphone and Norhydrocodone in Urine Following Single Dose Administration of Hydrocodone to Healthy Volunteers
These numbers come from single-dose studies in healthy volunteers. If you have been taking the medication regularly, the detection window stretches considerably because the drug and its metabolites accumulate. Factors like kidney function, hydration, body composition, and metabolism speed also shift the window. A standard urine immunoassay panel will flag hydrocodone as a positive for opioids, and confirmatory testing can distinguish it from other opioids. If you have a valid prescription, providing documentation to the testing facility before the test is the simplest way to handle a positive result.
How Rescheduling Changed Access
Until 2014, hydrocodone combination products were classified as Schedule III, which allowed prescriptions to be phoned in and refilled up to five times. That year, the U.S. Drug Enforcement Administration reclassified them to Schedule II, the same category as oxycodone and morphine. The change was intended to curb the high rates of hydrocodone misuse, and the prescribing data suggests it had a real effect: hydrocodone dispensing dropped by more than 30% over the following years, with a sharp additional decline immediately after rescheduling.14PubMed Central. The Impact of Hydrocodone Rescheduling on Utilization, Abuse, Misuse, and Overdose Deaths
The picture is not entirely clean, though. Some of the reduction in hydrocodone prescribing was offset by increases in prescriptions for codeine, oxycodone, and morphine, suggesting that some prescribers simply shifted to other opioids rather than reducing opioid use overall. In Ohio, researchers found that the rescheduling was associated with lasting declines in hydrocodone prescriptions beyond what was already trending downward, though different medical specialties responded to the change in different ways.15PubMed Central. Effects of Rescheduling Hydrocodone on Opioid Prescribing in Ohio The practical upshot for patients today: you need a new written prescription for every fill. No phone-in prescriptions and no refills without another visit or contact with your prescriber.
When Prolonged Use Backfires
One of the less intuitive risks of taking any opioid for an extended period is a phenomenon called opioid-induced hyperalgesia. Rather than continuing to relieve pain, prolonged opioid exposure can actually lower your pain threshold, making you more sensitive to pain than you were before treatment started. Over the past several decades, both laboratory and clinical reports have documented lowered pain thresholds and heightened pain sensations that don’t match the original injury as hallmarks of this condition.16PubMed Central. Opioid-induced hyperalgesia: clinically relevant or extraneous research phenomenon?
Hyperalgesia is different from tolerance, though the two can look similar from the outside. With tolerance, you need a higher dose to get the same level of relief. With hyperalgesia, the drug is actually making the pain worse, and increasing the dose only deepens the problem. Distinguishing the two is tricky even for clinicians, but the treatment strategies are opposite: tolerance calls for dose adjustment, while hyperalgesia calls for tapering or rotating to a different type of pain medication. If you find that your pain is worsening despite stable or increasing doses, and the underlying condition has not changed, this possibility is worth discussing with your doctor rather than simply requesting a higher dose.
Safe Storage and Disposal
Because the 107 pill is a Schedule II opioid, leaving it in an unlocked medicine cabinet creates real risk. Most non-medical opioid use begins with pills obtained from a friend’s or family member’s supply, not from a dealer. Keep the medication in a place that is not visible or easily accessible to others in your household, especially teenagers. When you finish the prescription, do not let leftover pills sit in the cabinet indefinitely. Most pharmacies and many police departments host drug take-back programs. If none is available, the FDA recommends mixing leftover pills with something undesirable like coffee grounds or cat litter in a sealed bag and throwing them in the household trash.
Flushing opioids down the toilet is listed as an acceptable disposal method by some agencies when take-back options are not available, though environmental groups push back on this due to concerns about pharmaceutical contamination of waterways. The balance of risk generally tips toward preventing human misuse over the relatively diluted environmental exposure, but a take-back program avoids the dilemma entirely.