Lortab

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Lortab

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 Lortab

Quick Facts: What is Lortab?

Property Description
Active ingredient Hydrocodone bitartrate; Acetaminophen
Form Tablet or Oral Solution/Elixir
Pharmacological class Opioid Analgesic Combination (CII)
Common use Relief of moderate to severe acute pain
Origin Semi-synthetic (Hydrocodone) and Synthetic (Acetaminophen)

What Type of Medicine is Lortab? (Identity and Classification)

Lortab is a former brand name for a combination medicine that contains two active ingredients: hydrocodone bitartrate and acetaminophen. Hydrocodone is classified as an opioid analgesic (pain medicine), while acetaminophen is a widely used non-opioid analgesic and fever reducer. This combination is typically administered via the oral route, often in the form of a tablet or an oral solution.

Hydrocodone itself is a semi-synthetic opioid derivative, and its presence places the final combination product under the highly restrictive Schedule II classification due to its potency and potential for dependence. This regulatory status confirms the drug's use is reserved for treating pain that is moderate to severe and cannot be adequately managed by non-opioid treatments.

Dual Action: What is Lortab Made Of? (Composition and Mechanism)

The core of this medication's effect lies in its dual composition, which is designed to provide comprehensive pain relief. Hydrocodone acts centrally as the opioid component, binding to receptors in the central nervous system to reduce the patient's perception of pain. The acetaminophen component works through separate pathways to alleviate general pain and reduce fever.

This deliberate combination is pharmacologically supported to achieve greater overall analgesia. Clinically, combining the two different pain pathways allows for a stronger effect than either ingredient could offer alone, a principle widely recognized in pain management research.

Lortab Compared to Similar Pain Medications (Form and Analogue Intent)

The defining feature of this medication is its status as a fixed-dose combination product of two different active agents. This immediately distinguishes it from single-ingredient pain relievers. The combination formula of hydrocodone and acetaminophen has historically been one of the most frequently prescribed opioid pain relief products, confirming its standard role in managing acute, severe discomfort.

Regulatory References

  1. Hydrocodone Combination Products: MedlinePlus Drug Information
  2. Hydrocodone and Acetaminophen - StatPearls - NCBI Bookshelf

What side effects are possible with Lortab?

Possible side effects and safety information

This section describes the officially documented adverse effects and safety characteristics of the hydrocodone/acetaminophen combination, based strictly on government regulatory documents.

Category Description
Most Frequently Reported Effects These commonly affect the Central Nervous System (CNS) and Gastrointestinal system, including sedation, dizziness, lightheadedness, nausea, vomiting, and constipation.
System-Organ Classes Involved Adverse reactions are documented across the CNS, Gastrointestinal, Dermatological, Genitourinary, and Hepatobiliary systems in official labeling.
Serious Adverse Reactions Officially documented critical risks include Life-Threatening Respiratory Depression, particularly at the start of therapy or following a dosage increase. The acetaminophen component carries a risk of Acute Liver Failure (Hepatotoxicity) and severe Skin Reactions (e.g., SJS, TEN).
Time-Related Safety Patterns Risks such as Adrenal Insufficiency and Androgen Deficiency are associated with long-term use. Physical dependence may develop with prolonged exposure.
Population-Specific Considerations Elderly patients are at an increased risk for respiratory depression. Safety warnings address the risk of Neonatal Opioid Withdrawal Syndrome (NOWS) if used for a prolonged period during pregnancy, and caution is advised for patients with renal or hepatic impairment.
Safety Restrictions Contraindications include pre-existing significant respiratory depression, acute or severe asthma (in unmonitored settings), and known or suspected gastrointestinal obstruction (e.g., paralytic ileus). The risk of hepatotoxicity limits the maximum daily dosage of acetaminophen.

Connection to the overall safety profile

This safety information formally structures the risk profile by classifying adverse events according to their physiological impact and regulatory severity, from commonly observed CNS and GI effects to rare but critical outcomes like respiratory depression and liver failure. This regulatory framework defines the necessary limitations for use, particularly concerning pre-existing conditions that significantly amplify these recognized risks.

Overdose and Emergency Response

Overdose Manifestations and Severe Outcomes

Overdose with this combination product is defined by dual toxicity. The opioid component (hydrocodone) may lead to dose-related respiratory depression, extreme somnolence progressing to stupor or coma, cold and clammy skin, and constricted pupils. This can progress to life-threatening or fatal respiratory arrest. The acetaminophen component causes early symptoms such as nausea, vomiting, and diaphoresis, but the severe outcome is potentially fatal hepatic necrosis (acute liver failure), with clinical evidence often delayed 48 to 72 hours post-ingestion. Patients with impaired renal function or underlying liver disease, or who ingest alcohol, face an increased risk of severe toxic reactions.

Mandated Emergency Actions

Immediate medical help must be sought right away for any known or suspected overdose, even if symptoms are not yet apparent. Emergency medical care is required upon ingestion of more than 4,000 milligrams of acetaminophen per day. This is classified as a potentially lethal polydrug overdose that requires immediate intervention. Specific antidotes are documented: Naloxone is used for hydrocodone's respiratory depression, and N-acetylcysteine (NAC) is used for acetaminophen toxicity. Treatment involves cardiorespiratory function support, measures to reduce drug absorption, and continued surveillance.

Therapeutic Uses of Lortab

What Lortab Treats: Main Uses and Benefits


The combination of hydrocodone and acetaminophen (formerly Lortab) is specifically indicated for the management of pain that is severe enough to require an opioid analgesic and for which alternative treatments, such as non-opioid pain relievers, may not provide sufficient support. This therapy is applied in acute symptomatic contexts requiring strong support.

This medication helps address groups of symptoms that create noticeable interference with daily stability, commonly in scenarios such as post-operative pain, pain following trauma, or severe dental discomfort. The combination is relevant when symptoms escalate and short-term symptomatic assistance is needed.

The core benefit supports the patient during difficult episodes by easing distress and contributes to easing the overall symptom load during critical, short-term recovery phases. This medication is primarily relevant in contexts involving heightened systemic burden where functional stability becomes affected.

Quick Fact: Relief for High-Intensity Pain
Primary Symptom Axis Moderate to severe pain intensity.
Key Therapeutic Benefit Offers symptomatic relief and helps ease distress.
Associated Symptom Helps ease fever.

Symptom Management in Recovery Contexts

The medication is commonly used across conditions characterized by episodic or fluctuating symptom patterns related to medical events. It is applied in clinical settings marked by heightened patient distress, and is relevant for easing post-operative pain or intense pain following acute dental procedures. This may assist with easing the overall symptom load during critical, short-term recovery phases.

Dual Control of Pain and Systemic Discomfort

The formulation offers a combined benefit and is applied in addressing both intense pain and systemic symptoms of fever. Used in situations involving symptomatic discomfort and elevated temperature, the medication is relevant in clinical settings where symptoms cluster into patterns requiring multi-faceted supportive management. This contributes to easing day-to-day comfort and supports general well-being by easing distress from two primary sources of acute patient distress.

Regulatory References

  1. NIH MedlinePlus overview of Hydrocodone Combination Products

Eligibility and Restrictions for Use

Eligibility Map: Official Regulatory Information

The eligibility for hydrocodone/acetaminophen (formerly Lortab) is defined by official regulatory documentation, which specifies populations for whom the medicine is contraindicated, restricted, or requires special caution.

Eligibility Scope Status Defined by Regulators
Populations for whom use is allowed Adults requiring management of severe pain where non-opioid treatments are inadequate.
Populations for whom use is contraindicated Patients with known hypersensitivity to hydrocodone or acetaminophen, significant respiratory depression, acute or severe bronchial asthma, or known/suspected gastrointestinal obstruction (e.g., paralytic ileus).

Age-Related Eligibility Rules

Regulatory agencies state that the safety and effectiveness of the medicine in pediatric patients under two years of age are generally not established. For geriatric patients (65 and over), dose selection requires special caution, reflecting the greater frequency of decreased hepatic or renal function in this population.

Condition-Specific Eligibility Rules

Use is restricted and requires special caution in patients with: severe hepatic or renal impairment, head injury or increased intracranial pressure, certain endocrine disorders (e.g., hypothyroidism), prostatic hypertrophy, or seizure disorders. These conditions require careful monitoring.

Pregnancy and Lactation Eligibility Status

The medicine is classified as an older Pregnancy Category C designation. Prolonged use during pregnancy can result in the infant developing Neonatal Opioid Withdrawal Syndrome (NOWS). For nursing mothers, a decision must be made to discontinue nursing or discontinue the drug due to the presence of components in breast milk.

What should I know about interactions with other medicines?

The official regulatory profile for hydrocodone/acetaminophen details interactions classified by their effects on drug exposure and systemic activity, consistent with government-approved prescribing information.

Pharmacodynamic and Restriction-Based Interactions

Co-administration with Central Nervous System (CNS) depressants, including benzodiazepines, other opioid analgesics, and general anesthetics, may result in additive pharmacologic effects. This interaction is officially noted to increase the risk of profound sedation and respiratory depression. Furthermore, the combination is strictly restricted for use with Monoamine Oxidase Inhibitors (MAOIs), requiring a 14-day separation period after the MAOI is discontinued. Concomitant use with other serotonergic drugs (e.g., SSRIs, SNRIs) carries a documented potential for serotonin syndrome.

Metabolic Exposure Modifications

Regulatory documents specify that the hydrocodone component is metabolized by the CYP3A4 enzyme system. CYP3A4 Inhibitors (e.g., ketoconazole) can increase hydrocodone plasma concentration, which may heighten the risk of severe side effects. Conversely, CYP3A4 Inducers (e.g., rifampin) can decrease hydrocodone plasma concentration, which may reduce the medicine's documented effectiveness.

Substance and Condition-Specific Cautions

Alcohol (Ethanol) presents a dual interaction risk, contributing to additive CNS depression and increasing the risk of acetaminophen-related hepatotoxicity. Additionally, official labeling includes population-specific notes that the risk of toxic reactions may be greater in patients with hepatic or renal impairment due to altered drug clearance.

Mechanism of Action

Lortab, a combination product, contains hydrocodone and acetaminophen, each operating via distinct mechanistic pathways. Hydrocodone functions as a full agonist at the mu-opioid receptor (mu-OR), primarily located throughout the central nervous system, including the brain and spinal cord. Agonist binding to the mu-OR, a Gi/o-protein coupled receptor, initiates intracellular signaling via G-protein dissociation. This cascade results in the inhibition of adenylyl cyclase activity, leading to a decrease in the concentration of intracellular cyclic adenosine monophosphate (cAMP). Downstream effects include the increased conductance of inward-rectifying potassium channels (GIRK) and the inhibition of voltage-gated calcium channels. These combined ion flux modulations hyperpolarize the neuron, decreasing neuronal excitability and reducing the release of pronociceptive neurotransmitters from presynaptic terminals. The systemic physiological consequence is the modulation of ascending and descending nociceptive pathways.

Acetaminophen acts primarily in the central nervous system, where it is thought to modulate nociception by inhibiting prostaglandin synthesis, potentially through interaction with the cyclooxygenase (COX) enzyme system or related central pathways. The precise molecular target remains under investigation. The downstream effect involves the modification of central mechanisms that influence thermoregulatory and nociceptive signaling.

Dosage and Administration Information

The administration of hydrocodone and acetaminophen combination products (formerly Lortab) is strictly limited to the oral route, available as either a tablet or an oral solution. The regimen is proceduralized around determining the lowest effective amount for the patient’s pain, with the standard dose unit being 1 to 2 tablets or 15 mL of the solution, subject to titration based on individual response.

Frequency of use is constrained by a 4 to 6 hour schedule, with a mandatory minimum interval of 4 hours between doses. A critical constraint is the 4000 mg ceiling on the total daily intake of the acetaminophen component from all sources. This threshold strictly dictates the maximum number of units or solution volume that can be administered in a 24 hour period.

For the liquid form, official guidelines mandate the use of an accurate, graduated measuring device—such as a dosing syringe or calibrated cup—to prevent measurement errors. The combination is explicitly intended for short-term symptomatic management of acute pain. Special procedural cautions, which often necessitate dose modifications, apply to the use of the medicine in older adults and patients with severe hepatic or renal impairment.

Recent Clinical Evidence

Research Evidence Overview

The combination of hydrocodone (an opioid analgesic) and acetaminophen (a non-opioid pain reliever) is indicated for the management of pain severe enough to require an opioid and for which alternative treatments are inadequate. Recent clinical research focuses primarily on the long-term safety, risk mitigation, and comparison of different formulations.


Efficacy and Analgesic Profile

Clinical trials, including randomized studies, confirm the combination's analgesic effect is greater than placebo in relieving moderate to moderately severe pain. The hydrocodone component binds to opioid receptors in the central nervous system, altering the body's perception of pain. Acetaminophen complements this action by providing an additional, distinct mechanism for pain relief and fever reduction.


Safety and Risk Mitigation Studies

Due to the components of Lortab (Hydrocodone/Acetaminophen), ongoing research and regulatory focus centers on critical safety risks:

  • Hepatotoxicity Risk: The acetaminophen component carries a well-established risk of acute liver failure, especially at doses exceeding 4,000 mg per day. The FDA has addressed this by limiting the acetaminophen content in prescription combination products to a maximum of 325 mg per dosage unit.
  • Opioid Risks: Studies emphasize the risks of addiction, abuse, and misuse associated with the hydrocodone component. Clinical guidelines strongly recommend thorough patient risk assessment and monitoring. The potential for life-threatening respiratory depression is a major concern, particularly upon initiation or dose increase, which underscores the need for careful individual titration.

Frequently Asked Questions (FAQ)

Common questions about Lortab (FAQ)


Q: Is Lortab the same as Vicodin?

A: Lortab is a former brand name for a combination drug containing hydrocodone bitartrate and acetaminophen. Official information often references Lortab and Vicodin, alongside others like Norco, as examples of products with the same active ingredients. These medicines are generally regulated as Schedule II controlled substances due to their potential for dependence.

Q: How quickly should Lortab start working after I take it?

A: According to official regulatory documents, the hydrocodone component typically reaches its highest level in the blood plasma about 1.3 hours after a dose is taken by mouth. The onset of pain relief is typically related to this pharmacokinetic timeframe, although individual responses may vary.

Q: How long does the effect of Lortab typically last?

A: The elimination half-life of the hydrocodone component is approximately 3.8 hours. This is the time it takes for half of the drug to be eliminated from the bloodstream. Regulatory documents reflect that the medicine's half-life is consistent with an administration schedule that typically involves intervals of four to six hours.

Q: Are there specific food or drink interactions with Lortab?

A: Official labeling strongly warns against the use of alcohol while taking this medicine. This is because alcohol can contribute to additive Central Nervous System (CNS) depression and may increase the risk of liver damage from the acetaminophen component. Some authoritative sources note that certain foods, such as grapefruit or grapefruit juice, have been examined for their potential to affect the body's processing of the hydrocodone component.

Q: Is it true that Lortab can cause changes in mood?

A: Yes, official product information indicates that changes in mood, such as anxiety, fear, or dysphoria, are listed as adverse reactions. These effects are classified as Central Nervous System (CNS) effects and may occur alongside other reactions like drowsiness and sedation.

Q: Does Lortab work differently for different people?

A: Regulatory guidance acknowledges individual variability. Official documents state that the dosage should be adjusted based on the severity of a person's pain and their unique response to the medication. This reflects that the medicine's effects, including both pain relief and potential side effects, may differ among individuals.

Q: What is the role of acetaminophen in the Lortab combination?

A: Acetaminophen is the non-opioid ingredient in the combination. Its function is to act as a pain reliever and fever reducer through a mechanism separate from the opioid component. The combination is pharmacologically designed to utilize two different mechanisms for pain relief.

Q: What is the main difference between Lortab and Norco?

A: Both Lortab and Norco are brand names for medicines containing the same active ingredients: hydrocodone and acetaminophen. The primary differences, noted in regulatory labeling, generally involve the specific strengths (ratio and amount) of the ingredients within the different tablets that were marketed under those brand names.

Q: Is Lortab available as a generic medicine?

A: Lortab is a former brand name. The medicine is broadly available as a generic drug called hydrocodone bitartrate and acetaminophen tablets or oral solution. The generic version contains the same active ingredients as the brand-name product.

Q: Can Lortab be taken with over-the-counter pain relievers?

A: Official instructions note that patients should avoid using this medication with any other product containing acetaminophen (APAP). This is to prevent accidental overdose and potential liver damage. Regulatory warnings also describe the risk of additive sedation if taken with other opioid analgesics.

Q: Is Lortab approved for use in children?

A: Official U.S. regulatory information states that the safety and effectiveness of this specific combination product have not been established in pediatric patients.

Q: Can Lortab be split or crushed?

A: Regulatory caution for oral opioid tablets often advises against modifying the form of the drug, such as chewing, crushing, or dividing them. This modification may result in the rapid release of the hydrocodone component, which is described as a risk in official documents.

Q: Does Lortab interact with herbal supplements?

A: While regulatory labeling focuses mainly on prescription drugs, the metabolism of hydrocodone involves the CYP3A4 enzyme system. Authoritative sources sometimes note that certain herbal supplements, such as St. John's wort, may affect this enzyme, which could potentially alter the drug's effectiveness or safety profile.

Q: Does Lortab have a bitter taste?

A: The acetaminophen component, one of the two active ingredients, is described in official drug product descriptions as a 'slightly bitter, white, odorless, crystalline powder.'

Q: Can Lortab be used for pain after dental surgery?

A: The medicine is officially indicated for managing pain that is severe enough to require an opioid analgesic. Official labeling does not list specific types of pain, such as dental pain, but its use is based on the official indication for severe pain, rather than the specific source of the pain.

Q: Is Lortab prescribed for tension headaches?

A: The medicine is officially indicated for managing pain that is severe enough to require an opioid analgesic. Official labeling does not list specific types of pain, such as tension headaches, but its use is based on the official indication for severe pain, rather than the specific source of the pain.

Q: Can Lortab be taken on an empty stomach?

A: Patient-directed information often notes that the medicine can be taken with or without food. Taking the medicine with food is a common strategy mentioned in patient-directed materials to help mitigate potential stomach upset.

Q: What is the typical timeframe people use Lortab for?

A: Regulatory documents indicate that this combination product is intended for the short-term management of acute pain. The precise duration is decided based on the patient's individual circumstances, aligning with the regulatory focus on short-term use and risk assessment.

Q: Are there other names for the drug Lortab?

A: Yes, the combination of hydrocodone and acetaminophen has been marketed under many brand names, including Vicodin and Norco. It is also frequently referred to by its full generic name, hydrocodone bitartrate and acetaminophen.

Q: Does Lortab interact with cold or flu medicines?

A: Official warnings describe the risks associated with taking this medication alongside cold or flu products that contain acetaminophen (APAP). Users of this medicine are directed by official sources to check the active ingredients of all other medications to prevent exceeding the recommended daily limit for acetaminophen.

Q: Why are there different strengths of Lortab available?

A: The availability of different strengths is related to the regulatory instruction that the dosage must be adjusted based on the severity of the pain and the patient's response. This ensures that the selection of the lowest effective dose is possible for each individual.

Q: Do studies suggest Lortab loses effectiveness over time?

A: Official documents mention that tolerance to the hydrocodone component may develop with continued use. The development of tolerance may be associated with the need for a higher concentration of the drug to achieve the same analgesic effect.

How should Lortab be stored and disposed of?

Official Storage and Security Requirements

Lortab (hydrocodone/acetaminophen) must be stored at Controlled Room Temperature, which is officially defined as 20 C to 25 C (68 F to 77 F), with excursions permitted up to 30 C (86 F). The medication must be kept in its original, tightly closed container and protected from both excess heat and light.

Due to the risks associated with accidental exposure, regulatory labeling mandates that this opioid analgesic be stored securely and out of the sight and reach of children and others.

Official Disposal Instructions

Disposal of unused or expired Lortab is mandatory to prevent misuse. The primary, recommended method is to drop off the medication at an authorized drug take-back location or use a prepaid mail-back envelope.

If a take-back option is not immediately available, the FDA authorizes Lortab to be flushed down the toilet. This is an exception made for certain potent, high-risk medications where the danger of accidental poisoning to children or others outweighs potential environmental concerns from flushing.

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

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