Clocinol

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Clocinol

Treatment option: Pain

Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Clocinol

Property Description
Active Ingredients Acetaminophen, Tramadol Hydrochloride
Form Oral Tablet
Pharmacological Class Combination Analgesic (Narcotic)
Common Use Pain Management
Origin Synthetic

What Type of Medicine is Clocinol?

Clocinol is classified as an analgesic and is specifically prepared as a Fixed-Dose Combination (FDC) product, integrating two distinct pain-relieving substances into a single, standardized oral tablet. This medicine is categorized pharmacologically as a narcotic analgesic combination. This dual classification—combining a non-opioid with a synthetic opioid—is clinically recognized for providing broad-spectrum pain relief that often exceeds that of single-agent therapies. Due to its FDC nature, similar formulations are widely available globally under various brand names and generic equivalents.

The Dual Composition: Acetaminophen and Tramadol Hydrochloride

The composition of Clocinol is defined by its two active ingredients: Acetaminophen and Tramadol Hydrochloride. Acetaminophen acts as a non-opioid, non-salicylate agent, while Tramadol, a synthetic opioid analgesic, establishes the medicine's origin as primarily synthetic. The essential feature of this combination is the achievement of a synergistic effect, meaning the combined therapeutic action of the two agents is intentionally greater than if they were administered separately. This evidence supports its design as a single medication offering a differentiated pharmacological profile compared to common over-the-counter alternatives.

General Purpose of this Combination Analgesic

The overall purpose of Clocinol is to provide robust support for pain management in situations where simpler medications may be insufficient. This formulation is engineered to facilitate a dual-action approach, mitigating discomfort by having both components affect pain signaling pathways simultaneously and enhancing the body's pain threshold. This FDC design ensures that the specialized pain-modulating properties of both the non-opioid agent and the synthetic opioid analgesic are leveraged together for effective, consistent relief.

Regulatory References

  1. Tramadol Hydrochloride and Acetaminophen Tablet Label

What side effects are possible with Clocinol?

Possible side effects and safety information

Clocinol, an oral combination analgesic, has a safety profile established through government regulatory documents (e.g., FDA, EMA) that classify adverse reactions by frequency and physiological system. The safety data includes both common, expected effects and mandated warnings regarding serious adverse reactions.

Frequency-Classified Adverse Reactions

Adverse reactions are formally grouped by the body system affected and categorized by how often they were reported in clinical studies:

  • Very Common (occurring in 1/10 patients): Nausea, Dizziness, and Somnolence (drowsiness).
  • Common (occurring in 1/100 to < 1/10 patients): Vomiting, Constipation, Headache, Dry Mouth, and Increased Sweating.

These effects are generally classified within Gastrointestinal and Nervous System Disorders.

Serious Adverse Reactions and Safety Constraints

The regulatory profile highlights several critical safety concerns. The medicine carries official warnings regarding the risk of life-threatening Respiratory Depression, which is highest upon treatment initiation or following a dose increase. Other serious, documented risks include Hepatotoxicity (severe liver damage) due to the acetaminophen component, Seizures (convulsions), and the potential for Serotonin Syndrome.

Due to its composition, a high-level safety constraint involves the documented risk of Addiction, Abuse, and Misuse.

Population-Specific Safety Notes

The regulatory information contains constraints for specific patient populations. Use is contraindicated in children younger than 12 years of age. Older adults and individuals with severe Renal or Hepatic Impairment require closer observation and are generally advised against use or require significant dosage adjustments due to the potential for accumulation and toxicity.

Overdose and Emergency Response

Overdose and when to seek help — Official Regulatory Information for Clocinol

Overdose scope

Classification Detail
Documented Overdose Presentations Manifestations may include symptoms of liver injury (nausea, vomiting, diaphoresis) and severe Central Nervous System effects, such as respiratory depression, somnolence, seizures (convulsions), and profound hypotension. Signs consistent with Serotonin Syndrome are also documented.
Physiological Systems Affected The official label highlights the risks to the Hepatic, Central Nervous, Respiratory, and Cardiovascular systems.
Population-specific Notes Increased severity and risk are explicitly noted for pediatric patients and individuals with pre-existing hepatic impairment or renal impairment.
Emergency-response Statements Regulatory documents mandate to Seek immediate medical attention and Contact Poison Control Center immediately for any suspected overdose.
Immediate Help Required Immediate medical help is mandated whenever an overdose is suspected, even if symptoms are not immediately apparent, due to the potential for delayed onset of Fatal Hepatic Failure.

Overdose classifications (high-level)

Classification Detail
Severity classification Classified as Life-Threatening and Potentially Fatal due to the risk of hepatic and respiratory failure.
Overdose-context constraints Toxicity involves a Dual Toxicity Risk requiring specific antidotal management protocols.

Resulting overdose structure

  • Fatal Hepatic Failure and Respiratory Arrest are documented severe outcomes.
  • N-acetylcysteine (NAC) and Naloxone are specified as agents to be administered for management.
  • Maintenance of adequate ventilation and Continuous monitoring (vitals, ECG) are required procedural steps.

Regulatory documents define the Clocinol overdose profile by the combination of two severe toxicities, necessitating prompt intervention due to the high risk of Cardiac Arrest, Respiratory Arrest, and Fatal Hepatic Failure. The official requirements mandate that immediate medical attention be sought and that specific antidotal and supportive measures, such as NAC and Naloxone administration, be implemented under expert supervision to manage the consequences of acute overexposure.

Therapeutic Uses of Clocinol

Quick Facts: Main Therapeutic Domains

  • Supportive Relief: Indicated for providing temporary relief of mild localized discomfort.
  • Condition Management: Used in the management of non-infectious inflammatory skin irritations.
  • Symptom Mitigation: May assist in mitigating symptoms such as redness and minor swelling associated with dermatological reactions.

Clocinol is a product formulated for the topical management of certain mild, non-severe dermatological manifestations. Its primary function involves addressing localized symptoms, supporting the patient's comfort during periods of minor skin irritation. The formulation is applied to assist in the mitigation of temporary redness, itching, and swelling that may accompany routine skin conditions or mild allergic responses. The therapeutic benefit is focused on symptom reduction and promoting a return to baseline skin comfort.

For chronic or complex conditions, Clocinol is used as part of a broader care plan, working to provide localized relief without addressing the underlying systemic cause. Patients should consult a healthcare provider to understand the appropriate role of this treatment in their condition, particularly for conditions that require comprehensive care.

Its use is limited to the defined therapeutic domains, primarily offering supportive care and contributing to the resolution of minor, superficial symptoms.

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Clocinol

Clocinol is an analgesic combination whose official use is strictly defined by regulatory bodies such as the FDA and EMA to manage risks associated with the opioid component (Tramadol) and Acetaminophen. Eligibility is governed by age, pre-existing conditions, and specific physiological states.

Populations for whom use is generally allowed:

  • Adults and adolescents ge 12 years of age.
  • Patients whose pain is moderate to severe and requires a combination analgesic [Source 2.8].

Populations for whom use is contraindicated (Must Not Use):

  • Children younger than 12 years of age [Source 1.8].
  • Children younger than 18 years post-tonsillectomy or adenoidectomy [Source 1.8].
  • Patients with severe hepatic impairment or uncontrolled epilepsy [Source 2.2, 2.8].
  • Patients in a state of acute intoxication from alcohol, opioids, or psychotropic drugs [Source 2.9].
  • Patients taking or recently having taken MAO inhibitors (within the last 14 days) [Source 2.7].

Eligibility-Related Restrictions:

  • Organ Function: Use is not recommended for patients with severe renal impairment or severe respiratory impairment [Source 2.8].
  • Older Adults (ge 75 years): Conditional use requires the minimum interval between doses to be extended [Source 2.8].
  • Reproductive Status: The medicine is not recommended during pregnancy or for breastfeeding women [Source 1.8, 2.1].
  • Comorbidities: Use is restricted in patients with a history of seizures (even if controlled) or with pre-existing conditions like increased intracranial pressure [Source 1.1].

What should I know about interactions with other medicines?

The official regulatory profile for Clocinol is defined by pharmacodynamic and pharmacokinetic interactions involving its two active components. Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is strictly contraindicated; an administration separation of 14 days is required before use. The product is also contraindicated with any other medicine containing Acetaminophen to prevent exceeding the documented safe limit and risking severe liver injury.

Interaction Class Interacting Substances (Examples) Official Outcome
Pharmacodynamic CNS Depressants (Alcohol, Benzodiazepines) Increased risk of profound sedation and respiratory depression.
Serotonergic Drugs (SSRIs, SNRIs) Increased risk of the potentially life-threatening serotonin syndrome.
Pharmacokinetic CYP2D6 Inhibitors (Fluoxetine, Quinidine) May increase Tramadol exposure while reducing the active M1 metabolite.
Warfarin and Coumarin Derivatives Documented to alter coagulation parameters, leading to an increased International Normalized Ratio (INR).

Co-administration with CYP3A4 inducers (e.g., Carbamazepine, St. John's wort) may decrease Tramadol concentration and efficacy. A population-specific caution notes that individuals classified as CYP2D6 Ultra-Rapid Metabolizers face a heightened risk of M1 metabolite exposure and potential respiratory depression. This structure defines mandatory use constraints.

Mechanism of Action

Clocinol exerts its mechanism of action through two primary biological domains. First, it functions as an irreversible inhibitor, targeting specific enzymes responsible for forming strong disulfide bonds within the complex structure of mucin proteins in respiratory secretions. This enzymatic inhibition triggers a mechanistic cascade known as depolymerization, chemically breaking the bonds that provide mucus with its viscosity and elasticity. This molecular change results in the modulation of secretion rheology, which facilitates the movement and removal of material via natural physiological processes, such as ciliary action. The second domain involves antioxidant activity. Clocinol engages with and neutralizes reactive oxygen species (free radicals) present in the local airway environment. This action modulates local oxidative stress pathways, influencing tissue chemistry by reducing the level of these chemical stressors. This combined structural and chemical mechanism defines the drug's physiological effect profile.

Dosage and Administration Information

How Clocinol is Used: Official Administration Guidelines

The administration of Clocinol, an oral fixed-dose combination containing tramadol and acetaminophen, is governed by standardized regulatory instructions defining the appropriate high-level use patterns. This product is strictly approved for the oral route of administration as an immediate-release tablet.


Standard Dosing and Frequency

The typical initial dose for adults is two tablets. The maintenance dose is also two tablets, taken as needed. The regulatory instruction mandates a minimum interval of six hours between successive doses, ensuring a specific frequency pattern is observed. Under no circumstances should the total daily intake exceed eight tablets (equivalent to 300 mg of tramadol and 2600 mg of acetaminophen). Tablets must be swallowed whole with liquid and may be taken independently of meals.


Duration and Special Conditions

Clocinol is designated for short-term use only, and administration should not continue beyond the necessary period. A critical procedural condition is the prohibition of co-administration with any other medicines containing either tramadol or acetaminophen to mitigate the risk of exceeding the total daily dose limit. Following prolonged use, discontinuation should involve a gradual downward taper rather than abrupt cessation.


Population Adjustments

Official labeling specifies dosage adjustments for certain populations. For patients with severe renal impairment (creatinine clearance < 30 mL/ min), the maximum dose must be restricted to two tablets every 12 hours. Use in patients with severe hepatic impairment is not recommended. Furthermore, older adults (aged 75 years and over) may require an extended dosing interval.

Recent Clinical Evidence

Clocinol: Recent Clinical Evidence

Evidence for Use in Acute Pain Management

The research for Clocinol was established primarily through randomized controlled trials (RCTs) examining how symptoms change over short time intervals, such as following surgical or dental procedures. Trials measured outcomes related to physical discomfort in adult populations. Study findings suggest that the combination was associated with patterns observed in the trials that differed from the outcomes measured when each medicine was administered alone. The patterns of onset and duration were observed to differ compared to tramadol or acetaminophen monotherapy. Existing studies provide limited insight beyond these immediate, short-term changes.


Evidence for Use in Chronic Pain Management

Research was evaluated in patients presenting with conditions marked by functional limitations, including chronic low back pain, osteoarthritis, and fibromyalgia. These studies monitored patient-reported outcomes describing perceived discomfort and daily activity level. Findings describe patterns observed in the studies where the FDC was associated with changes in measured scores for physical functioning and quality of life when compared to inactive control groups.


Long-Term Evidence and Study Duration

Most controlled trials examining the medicine's measured outcomes have focused on intermediate follow-up durations, often ranging up to 12 weeks. While regulatory records contain real-world data gathered over longer periods, the scientific evidence from prospective, head-to-head RCTs is limited for extended timeframes. Long-term outcomes related to the sustained effect are not fully established.


Research in Specific Patient Groups

The research has explored the FDC in specific patient populations, including older adults with chronic pain. However, regulatory information indicates this combination product was not studied in children younger than 12 years of age, and the evidence base is insufficient for this population due to the known pharmacological profile of tramadol. Data for other groups remain insufficient to draw broad conclusions.


Key Evidence Gaps and Areas of Uncertainty

Research highlights that comparative evidence is lacking for a comprehensive evaluation against a wide selection of alternative active pain medications. Furthermore, evidence quality varies across studies, and subgroup findings are uncertain for certain complex pain populations. The limitations of the research mean that conclusions reflect the specific conditions and populations studied, and certainty remains low in areas where long-term effects are not fully established.

Frequently Asked Questions (FAQ)

Common questions about Clocinol (FAQ)

Q: Is Clocinol the same as [Name of common drug]?

A: Clocinol is a fixed-dose combination product, which means it contains two distinct active ingredients for pain relief: tramadol (an opioid analgesic) and acetaminophen (a non-opioid analgesic). This dual composition gives the medicine a different pharmacological profile than either agent used alone. While similar formulations exist globally, official information clarifies its specific combined nature.

Q: How quickly does Clocinol start to work?

A: Studies on Clocinol focus on its use for acute pain and measure its effectiveness over short intervals of time. Official regulatory data provides information on how long it takes for the drug's components to reach peak plasma concentration in the bloodstream, which is typically associated with the time of its most noticeable effect. However, a specific time-to-onset (e.g., 30 minutes) is often patient-dependent and not provided in the general labeling.

Q: Are there any specific foods or drinks that should be avoided while using Clocinol?

A: Official regulatory documents warn against the use of alcohol while taking this medicine, as this combination can lead to increased risk of serious side effects like profound sedation and respiratory depression. The tablets may be taken either with or without food (independently of meals), as official administration guidelines do not require specific food avoidance.

Q: Is Clocinol safe for older adults (over 65)?

A: Use in older adults is generally permitted but requires caution. According to regulatory instructions, patients who are 75 years of age and over may require an extended interval between doses due to changes in how the body processes the medication. The need for any dosage adjustment is a clinical decision based on the patient's specific age and health factors.

Q: Is Clocinol considered a 'strong' medicine?

A: Regulatory documents classify Clocinol as a narcotic analgesic combination because it contains a synthetic opioid (tramadol) alongside acetaminophen. The medicine is officially indicated for pain 'severe enough to require an opioid analgesic.'

Q: What are the warning signs of a serious, but rare, side effect from Clocinol?

A: Official safety information highlights several serious risks, including Serotonin Syndrome, which may manifest with symptoms like agitation, confusion, fast heart rate, and fever; and Respiratory Depression, noted by shallow or slow breathing. The occurrence of any severe or unusual symptoms requires prompt consultation with a healthcare professional.

Q: Are there any documented long-term effects of using Clocinol?

A: Long-term use carries regulatory warnings about the risks of Addiction, Abuse, and Misuse. Most controlled clinical trials were conducted for short-term use only, often less than 12 weeks. Therefore, the long-term safety and sustained effects of using this medicine for extended periods are not fully established by prospective studies.

Q: Why do people sometimes need to switch from one drug to Clocinol?

A: Official labeling indicates that this product is reserved for the management of pain when alternative treatments, such as non-opioid analgesics, have not been tolerated or have not provided adequate relief. The combination is intended to offer pain relief when simpler medications are insufficient.

Q: Why is Clocinol a prescription-only medicine?

A: Clocinol is classified as a Controlled Substance (e.g., Schedule IV in the US) because of the presence of the opioid ingredient, tramadol. This classification is required due to the associated regulatory risks of addiction, abuse, and misuse, necessitating strict monitoring by a prescribing clinician.

Q: What evidence exists for Clocinol's use in diverse populations?

A: Clinical trials are generally conducted across diverse demographics. However, official labeling notes that the evidence base for Clocinol is insufficient for certain groups, particularly children younger than 12 years of age. Caution and adjustments are also required for individuals with certain organ impairments.

Q: Is there a risk of withdrawal symptoms when stopping Clocinol?

A: Withdrawal symptoms or physical dependence are recognized as risks associated with opioid-containing products. For this reason, official administration guidelines describe the process for discontinuation as a gradual downward taper rather than abrupt cessation to minimize these symptoms.

Q: What are the main reasons why Clocinol might not work for someone?

A: One known reason for reduced efficacy, according to official warnings, is taking Clocinol alongside certain drug-drug interactions (e.g., CYP3A4 inducers) that can lower the concentration of the tramadol component. Efficacy can also vary due to differences in individual patient metabolism and pain response.

Q: What is the typical time frame before the full effect of Clocinol is reached?

A: The time to peak plasma concentration—when the drug is fully absorbed and the concentration in the blood is at its highest—is outlined in the pharmacokinetic data for both active ingredients. This peak concentration typically correlates with the time the full therapeutic effect is reached, though individual response may vary.

Q: Why is Clocinol used to treat [Condition A] but not [Condition B]?

A: Official regulatory bodies only authorize the use of Clocinol for the treatment of acute pain that requires an opioid. The authorized use is strictly limited to the conditions for which the product's safety and effectiveness data were submitted to and approved by the regulatory agencies.

Q: What happens if I forget to take Clocinol for a day?

A: Patient-facing regulatory information generally advises that if a dose is missed, it should be skipped in favor of following the regular prescribed schedule. Official warnings caution against taking a double dose to make up for a forgotten one due to the increased risk of serious adverse effects.

Q: Can Clocinol affect the results of common lab tests (e.g., blood tests)?

A: Official documents note that when Clocinol is taken with certain interacting drugs, such as Warfarin, it can alter specific blood test results. Specifically, it has been documented to change coagulation parameters, leading to an increased International Normalized Ratio (INR).

Q: What should be done if Clocinol seems to stop working over time?

A: Regulatory information advises against increasing the dose independently if the medicine appears less effective after a few weeks of use. The review of the treatment plan is a required clinical action in cases where efficacy decreases.

Q: Does Clocinol cause any common skin reactions?

A: While the regulatory list of common side effects does not typically include skin reactions, official warnings note that the acetaminophen component has been associated with rare but potentially life-threatening severe skin reactions, such as Stevens-Johnson Syndrome (SJS). Signs of severe skin reactions, such as rash, blistering, or peeling, are serious adverse events that require prompt medical evaluation.

Q: Can Clocinol affect mood or cause emotional changes?

A: Official safety information includes warnings regarding potential mental or mood changes as a serious side effect. These changes can include symptoms like agitation or hallucinations, and a risk of suicide is noted for patients who may be vulnerable.

Q: Is it possible to be allergic to Clocinol?

A: The product is formally contraindicated in patients with a known hypersensitivity (allergic reaction) to either of the active ingredients, tramadol or acetaminophen, or any other component in the tablet.

Q: How is the safety of Clocinol tracked and monitored after it is approved?

A: Official labeling for the product includes instructions on how both healthcare professionals and patients can report Suspected Adverse Reactions to the manufacturer and the national regulatory body. This system allows the agency (e.g., FDA or EMA) to continue tracking and monitoring the drug's safety profile in the general population.

Q: Can Clocinol be taken by people with diabetes?

A: While diabetes is not listed as a formal contraindication, the regulatory label notes that the medication has been rarely associated with risks of hypoglycemia (low blood sugar) and hyponatremia (low sodium levels). Because these risks are relevant to conditions like diabetes, clinical factors must be taken into account when the medicine is used.

How should Clocinol be stored and disposed of?

Storage Conditions and Environmental Protection

Clocinol (Acetaminophen/Tramadol Hydrochloride) must be stored at a Controlled Room Temperature between 20 C and 25 C (68 F and 77 F). The regulatory labeling permits brief temperature excursions only up to 30 C (86 F).

The medication must be protected from moisture and kept in its original container with the lid secured tightly closed to maintain product stability.

Child Safety and Disposal Requirements

As an opioid-containing product, Clocinol must be stored strictly out of the sight and reach of children and pets to prevent accidental ingestion.

Disposal of unused or expired tablets should be conducted through an official drug take-back program. If this option is not available, the product must be mixed with an undesirable substance, sealed in a bag or container, and placed in the household trash. The tablets must not be flushed down the toilet, as they are not on the list of medications approved for wastewater disposal.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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