Laregab NT

Quick links to important sections

Laregab NT

Treatment option:

Medically reviewed

Marina Burgos

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 Laregab NT

Laregab NT is a Fixed-Dose Combination (FDC) pharmaceutical product, supplied as an oral tablet, specifically formulated with two distinct, synthetic active ingredients to provide a multimodal approach to managing chronic nerve pain.

Property Description
Active Ingredients Gabapentin (Anticonvulsant), Nortriptyline (Antidepressant)
Form Tablet (Oral preparation)
Pharmacological Class Analgesic Adjunct, Neuropathic Pain Management Agent
Common Use Chronic pain syndromes, particularly neuropathic pain
Origin Synthetic Compounds

What Type of Medicine is Laregab NT?

Laregab NT is medically recognized as an Analgesic Adjunct agent, incorporating two separate, proven therapeutic classes for managing complex nerve pain. The formulation combines Gabapentin, classified as a gamma-Aminobutyric Acid (GABA) analogue and anticonvulsant, with Nortriptyline, which is a secondary amine Tricyclic Antidepressant (TCA). The FDC format is specifically positioned for adult patients who require the clinical benefit of both mechanisms, streamlining the regimen compared to taking two individual tablets.

Composition and Dual Pharmacological Class

This composition features the two active compounds, Gabapentin and Nortriptyline, combined with standard excipients for the tablet form. This dual pharmacological approach utilizes drugs with different mechanisms of action to provide a superior analgesic effect in painful neuropathic conditions. This approach is particularly relevant for the typical use scenario of Laregab NT, which is addressing the persistent, debilitating pain experienced by adults suffering from nerve damage.

General Purpose: Targeting Chronic Nerve Pain

Laregab NT's principal medical purpose is the comprehensive treatment of pain caused by nerve damage, known as neuropathic pain. The combination is designed to achieve a powerful synergistic action, with Gabapentin stabilizing the overactive electrical activity of damaged nerves, and Nortriptyline enhancing the body's natural pain-suppression pathways in the central nervous system. This dual-targeting approach is intended to reduce neuropathic pain more effectively than either drug used as a single agent.

What side effects are possible with Laregab NT?

Possible Side Effects and Safety Information

The safety profile for Laregab NT is characterized by the combined potential adverse effects of its two active components, Gabapentin and Nortriptyline, as classified in official regulatory documents. Side effects are systematically grouped by frequency and the body system affected.

Frequency-Classified Adverse Reactions

Classification Common Examples (from regulatory labels)
Very Common (ge 1/10) Dizziness, somnolence (drowsiness), ataxia
Common (ge 1/100 to < 1/10) Fatigue, dry mouth, weight gain, constipation, peripheral edema, blurred vision

These effects primarily involve the Nervous System and Gastrointestinal System. Effects such as dizziness and somnolence are noted in regulatory information as being more frequently observed at the start of treatment or following dose adjustments.

Serious Adverse Reactions and Constraints

Official labeling documents identify the potential for serious adverse reactions, including Suicidal Thoughts and Behavior (associated with the antidepressant component) and severe hypersensitivity reactions, such as Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) and anaphylaxis.

Safety limitations include Contraindications against use in individuals with known hypersensitivity to the ingredients, during the acute recovery phase following myocardial infarction, and with concurrent use of Monoamine Oxidase Inhibitors (MAOIs). Additionally, older adults are listed as a population with increased risk for CNS-related effects and falls.

Overdose and Emergency Response

Overdose and When to Seek Help

A suspected overdose of Laregab NT requires immediate medical attention due to the documented risk of severe, life-threatening outcomes. The official overdose profile is defined by the combined effects of its components, primarily involving the Central Nervous System (CNS) and the Cardiovascular System.


Documented Clinical Manifestations

Overdose may present with CNS depression, including somnolence, confusion, dizziness, and ataxia, potentially progressing to stupor or coma. Severe manifestations of toxicity include seizures (convulsions), irregular heartbeats, and marked hypotension (very low blood pressure).

Severe and Life-Threatening Outcomes

Regulatory documentation indicates the most critical risks are profound respiratory depression and severe cardiotoxicity, which can manifest as ventricular arrhythmias (e.g., QRS complex widening) and may result in fatality. The official labeling notes an increased risk of severe breathing difficulties in the elderly. Children are particularly sensitive to cardiotoxicity.


Required Emergency Actions and Management

Seek immediate medical attention for any suspected overdose. No specific antidote is known for the components of Laregab NT. Management is restricted to providing symptomatic and supportive treatment, including initial gastrointestinal decontamination with gastric lavage and activated charcoal within a hospital setting. Immediate cardiac monitoring is required upon presentation.

Therapeutic Uses of Laregab NT

What Laregab NT Treats: Main Uses and Benefits

This medication is considered relevant within therapeutic areas involving chronic neuropathic conditions, such as pain from nerve damage. It is generally applied across domains where additional symptomatic support is needed because the primary symptoms create noticeable physiological strain, covering conditions like Diabetic Polyneuropathy (DPN) and Post-herpetic Neuralgia (PHN). It is also utilized in clinical settings that involve acute or unstable symptom patterns where additional symptomatic support is required to manage the patient's condition.

Laregab NT is applied in addressing symptom clusters that may become intense or disruptive, helping to ease manifestations such as sharp, shooting, or burning pain and constant tingling or prickling sensations. It is relevant in contexts marked by increased discomfort and often used during phases when nerve-related discomfort makes falling asleep difficult. By easing these manifestations, the treatment offers symptomatic relief that helps patients cope more steadily with difficult episodes.

“This treatment provides support that helps ease the overall symptom burden and assists with maintaining functional stability during periods of heightened symptoms.”


Quick Fact: Use in Neuropathic Pain and Sleep Interference

Regulatory References

  1. NIH PubMed Central

Eligibility and Restrictions for Use

Who Can and Cannot Use Laregab NT?

This medication is officially restricted to adult patients (age 18 and older). Eligibility is strictly determined by official regulatory criteria, primarily based on contraindications from the Nortriptyline component and elimination requirements of the Gabapentin component.

Contraindicated Populations (Must Not Use) Conditional Use Restrictions
Patients with known Hypersensitivity to either active ingredient. Patients with reduced renal function (kidney impairment).
Patients who are receiving a Monoamine Oxidase Inhibitor (MAOI), or have used one within 14 days. Patients with certain cardiovascular conditions (e.g., arrhythmias, Brugada Syndrome).
Patients in the acute recovery period after a Myocardial Infarction (heart attack). Patients with angle-closure glaucoma or history of mania/bipolar disorder.
Nursing Mothers (Lactating women). Older adults (Geriatric population) require caution due to reduced kidney function.

Use is generally not recommended for the pediatric population (under 18 years) as safety and effectiveness have not been established. Patients with compromised renal function must have their dose adjusted according to regulatory guidelines, as Gabapentin is primarily eliminated by the kidneys. Pregnant women or women of childbearing potential should use this medicine only if the potential benefit is clearly judged to outweigh the documented risks.

What should I know about interactions with other medicines?

Laregab NT Interactions with other medicines and products

Interactions with Laregab NT are documented based on the combined profile of Gabapentin (renal clearance) and Nortriptyline (CYP2D6 metabolism and serotonergic action).

Classification Interacting Agents (Official Regulatory Basis)
Contraindicated Combinations Monoamine Oxidase Inhibitors (MAOIs): Use is forbidden due to the high risk of Serotonin Syndrome. Acute Myocardial Infarction: Nortriptyline component is contraindicated during the acute recovery period.
Exposure-Altering Agents CYP2D6 Inhibitors: Agents like Quinidine or Fluoxetine can significantly increase plasma concentrations and reduce the clearance of the Nortriptyline component. Antacids (Aluminum/Magnesium): Officially reduce the bioavailability of Gabapentin.
Pharmacodynamic Risk CNS Depressants: Co-administration with substances like alcohol, opioids, or anxiolytics causes an additive effect, increasing the risk of severe CNS depression. Serotonergic Drugs (e.g., Triptans, SSRIs, St. John's Wort): Increases the potential for Serotonin Syndrome.

Regulatory Constraints and Separation Rules:

Official labeling requires a 14-day washout period when transitioning between MAOIs and Laregab NT. To mitigate the reduction in Gabapentin absorption, administration must be separated by at least 2 hours from aluminum and magnesium-containing antacids. Furthermore, co-administration with CNS depressants heightens the risk of respiratory depression in the elderly or those with pre-existing respiratory conditions. Patients identified as poor metabolizers of the CYP2D6 enzyme may experience increased exposure to Nortriptyline.

Mechanism of Action

How Laregab NT Works: Dual-Mechanism Pharmacodynamics

Stabilizing Pathological Neural Signaling

The Gabapentin component primarily targets the auxiliary alpha2delta subunit of Voltage-Gated Calcium Channels (VGCCs), which are functionally expressed within neural pathways. By binding to this subunit, the drug functionally modulates Ca^2+ influx, thereby reducing the release of excitatory neurotransmitters (like glutamate) from the nerve terminal. This core physiological consequence is the attenuation of neuronal hyperexcitability and the reduction of abnormal signal propagation.

Potentiating Intrinsic Inhibitory Pathways

The Nortriptyline component works on a separate but complementary mechanism by acting as an inhibitor of the Norepinephrine (NET) and Serotonin (SERT) Transporters. By blocking the neuronal reuptake of these monoamines, their concentration is elevated within the spinal cord. This action increases the activity of the intrinsic Descending Pain-Inhibitory Modulatory System, resulting in the suppression of ascending nociceptive signals.

Coordinated CNS Regulatory Action

Laregab NT's mechanism is defined by the synergistic interaction of these two central nervous system (CNS) actions. The combination simultaneously addresses two facets of dysregulation: Gabapentin reduces the input of pathological signals (pre-synaptic modulation), and Nortriptyline strengthens the output of inhibitory signals (post-synaptic potentiation). This integrated approach leads to an integrated, coordinated regulation of central nerve signal processing.

Dosage and Administration Information

Laregab NT is a fixed-dose combination product administered through the oral route as a tablet. The tablet must be swallowed whole and should not be crushed, chewed, or split to maintain the controlled delivery of the active ingredients. The medicine may be taken with or without food; however, to prevent interference with absorption, a minimum of a two-hour gap is required between the dose and the use of any antacids containing aluminum or magnesium.

Therapy is initiated with a low starting dose which is progressively titrated over several days until the effective maintenance frequency is reached, typically three times a day in divided doses. The total daily dose of the Gabapentin component can range up to 3600 mg when administered in this divided schedule. The largest daily dose is often recommended for administration at bedtime.

Dose adjustment is mandatory for adult patients with compromised renal function, as the total daily dose must be reduced proportionally to the patient's creatinine clearance. Use in children and adolescents under 18 years is generally not recommended for this indication. Finally, reduction or cessation of the medication must be a gradual process performed over a period of at least one week to support stable discontinuation.

Recent Clinical Evidence

Evidence for Use in Chronic Neuropathic Pain

The primary research for this fixed-dose combination therapy relies on Randomized Controlled Trials (RCTs) conducted in adults experiencing long-standing nerve pain. These studies were used to explore how symptoms change over time, specifically in patients diagnosed with Diabetic Polyneuropathy (DPN) and Post-herpetic Neuralgia (PHN).

In these studies, research examined patient-reported outcomes such as daily pain intensity. Findings describe patterns observed where the combination was associated with a higher proportion of participants meeting a pre-defined outcome threshold when compared to the groups taking the single agents (monotherapy). Research highlights patterns measured during the study period, which were often reported as a change in patient-reported pain intensity in the combination group.


What Research Outcomes Were Examined Beyond Pain

Research also examined outcomes related to functional balance alongside pain intensity, including sleep interference often associated with chronic nerve pain. Studies reported how symptoms evolved, suggesting the combination was associated with different measurements of sleep disturbance when compared to the single agents in some trials.

However, research monitored outcomes reflecting daily functioning, and findings for overall functional status did not always show clear differences across the groups that were studied. This research provides context but not individual predictions about all aspects of daily functioning.


What Remains Uncertain About Laregab NT Research

Long-term patient-reported outcomes over many months or years are less characterized, as the core RCTs focused on intermediate-term treatment periods, typically lasting about six weeks. Data for extended use are still limited.

The research landscape has distinct limitations, often relying on studies that used modest sample sizes and key findings observed in studies originating from a single study center. Data for certain patient groups, such as older adults or those with complex health conditions, remain insufficient. The limited sample sizes and study settings mean that the study results reflect the specific conditions under which they were conducted and do not determine whether an individual will respond similarly in a different clinical context.

Key Studies & References

  1. 2019 exceptional surveillance of neuropathic pain in adults: pharmacological management in non-specialist settings (NICE guideline CG173 update)

Frequently Asked Questions (FAQ)

Common questions about Laregab NT (FAQ)


Q: What is the main difference between Laregab NT and Laregab alone?

A: Laregab NT is classified as a Fixed-Dose Combination (FDC) that contains two active ingredients: Gabapentin and Nortriptyline. Gabapentin monotherapy (often referred to as Laregab) contains only the Gabapentin component. Regulatory classification defines Laregab NT as a Fixed-Dose Combination (FDC) containing both Gabapentin and Nortriptyline active ingredients.


Q: Is Laregab NT a narcotic or controlled substance?

A: According to official regulatory classifications in certain regions, such as the United States, the Gabapentin component of Laregab NT is designated as a scheduled prescription drug (e.g., Schedule V) due to its potential for misuse. The Nortriptyline component is generally not classified as a controlled substance.


Q: How quickly does Laregab NT start working for its main purpose? (Onset of effect)

A: While the maximum concentration of the ingredients in the blood is reached within a few hours of taking a dose, the full therapeutic benefit for nerve pain usually develops gradually. Official prescribing information indicates that dose titration (starting low and slowly increasing) is part of the treatment plan. The full therapeutic effect for pain relief is often developed gradually, which corresponds to the dose titration process described in the official documents.


Q: Is it safe to take Laregab NT with paracetamol or ibuprofen?

A: Official labeling lists specific medications and substances that are contraindicated or require special caution, such as CNS depressants and MAOIs. Paracetamol (acetaminophen) and ibuprofen are not typically identified in the official drug interaction section as significant interactions requiring specific dose adjustments or co-administration warnings.


Q: What happens if I forget to take a dose of Laregab NT? (Missed dose)

A: Regulatory patient instructions generally advise taking a missed dose as soon as it is remembered. However, if it is nearly time for the next scheduled dose, the missed dose should be skipped entirely, and the regular schedule resumed. Regulatory guidance states that a missed dose should not be doubled up to compensate for the skipped dose.


Q: How long can a person expect to be on Laregab NT treatment? (Duration)

A: Clinical trials that supported the drug's approved uses typically assessed patient outcomes over an intermediate-term period, often around six weeks, which informs the evidence base for use. The overall duration of therapy is a matter of clinical management.


Q: Does Laregab NT interact with any vitamins or herbal supplements?

A: Regulatory documentation lists known interactions, including the potential risk of Serotonin Syndrome when Laregab NT is combined with serotonergic agents like the herbal supplement St. John’s Wort. It is important to consult the official information for any known interactions with other vitamins or specific supplements.


Q: Does Laregab NT affect a person's mood or mental state? (Less severe effects)

A: Yes, official regulatory safety lists include several potential mood and mental effects reported in clinical use, such as anxiety, confusion, and nervousness. Additionally, the risk of suicidal thoughts and behavior requires careful monitoring as part of the official safety precautions.


Q: What are the restrictions on driving or operating machinery while taking Laregab NT?

A: Because Laregab NT commonly causes CNS side effects like dizziness, drowsiness (somnolence), and impaired coordination (ataxia), caution is required. Official regulatory documents advise against driving or operating heavy machinery until patients are certain the medication does not cause significant impairment.


Q: Is there a risk of dependence associated with Laregab NT?

A: Official regulatory labeling acknowledges the potential for the Gabapentin component to lead to physical dependence and potential withdrawal symptoms. Therefore, the official labeling recommends that if the medication is stopped, the Gabapentin component should be gradually discontinued, typically over a period of at least one week.


Q: Why do some people say Laregab NT helps with sleep? (Mechanism)

A: The safety profile lists somnolence (drowsiness) as a Very Common side effect, which may contribute to sleep onset. Regulatory documents also commonly recommend that the largest daily dose be taken at bedtime, consistent with managing the pain and sleep interference commonly experienced by patients with chronic nerve pain.


Q: Can Laregab NT be used by people with a history of seizures?

A: Official regulatory warnings note that stopping the Gabapentin component abruptly may increase the risk of seizures, even in patients without a prior history. Official warnings recommend a gradual discontinuation process if the medication is stopped, particularly for patients with a pre-existing seizure history, as abrupt cessation may increase seizure risk.


Q: What is the full list of ingredients in Laregab NT?

A: The full composition of the tablet, including both the active ingredients (Gabapentin and Nortriptyline) and all inactive ingredients (excipients) used in the formulation, is detailed in Section 6.1 of the official regulatory product information.


Q: Are there any dietary restrictions while taking Laregab NT?

A: The medicine may be taken with or without food. However, regulatory documents state that aluminum/magnesium-containing antacids should not be taken within two hours of the dose, and alcohol consumption significantly increases the risk of CNS depression.


Q: Does Laregab NT affect blood pressure?

A: Yes, the combined safety profile lists the potential for cardiovascular changes. These may include orthostatic hypotension (a drop in blood pressure when standing up) or, less commonly, hypertension (high blood pressure).


Q: Why is the 'NT' part included in the name Laregab NT?

A: Laregab NT is a proprietary name for a Fixed-Dose Combination containing Gabapentin and Nortriptyline. The 'NT' in the name is derived from the name of the second active ingredient, Nortriptyline, and serves to distinguish the combination product from Gabapentin monotherapy.


Q: What should I do if a side effect seems severe?

A: Regulatory patient information identifies signs of a serious allergic reaction (such as swelling or difficulty breathing), a severe skin reaction, or suicidal thoughts as adverse reactions for which official guidance recommends immediately contacting a healthcare professional or emergency services. These are considered severe events requiring prompt attention.


Q: Are there different strengths or forms of Laregab NT?

A: Laregab NT is marketed as a fixed-dose combination oral tablet. The official product labeling details the specific, fixed-strength amounts of the Gabapentin and Nortriptyline components that are authorized for this preparation.


Q: Is Laregab NT an anticonvulsant medicine?

A: Laregab NT is officially classified as an Analgesic Adjunct used to manage neuropathic pain. It is a combination drug, and one of its two agents, Gabapentin, does belong to the pharmacological class of anticonvulsant medicines.


Q: Does taking Laregab NT affect fertility in men or women?

A: Regulatory documents include a dedicated section on potential effects on fertility that reviews non-clinical or limited human data. This information is available in the official product information for specific details regarding reproductive health.


Q: Can Laregab NT interact with contraceptives (birth control)?

A: Official product labeling details known drug interactions. There is typically no reported interaction in regulatory documents requiring an adjustment to the dose of hormonal contraceptives when taken with Laregab NT.


Q: Is Laregab NT available over the counter?

A: Laregab NT is classified as a prescription-only medicine (Rx only) by regulatory bodies and cannot be legally dispensed without a valid prescription from a licensed healthcare provider.


Q: What is the difference in safety profile between Laregab and Laregab NT?

A: The safety profile of Laregab NT includes the combined adverse effects of both components. The addition of the Nortriptyline component adds risks related to its drug class, such as potential cardiac effects and the risk of Serotonin Syndrome, which are not present in the Gabapentin monotherapy profile.


Q: Why does Laregab NT sometimes cause dry mouth?

A: Dry mouth is listed as a Common side effect in the official safety profile. This effect is understood to be related to the pharmacological activity of the Nortriptyline component, which can lead to anticholinergic effects.


Q: What is the typical patient experience when starting Laregab NT?

A: The regulatory labeling describes a required titration process starting with a low dose. Regulatory documents note that common effects like dizziness and drowsiness are more frequently observed at the start of treatment or following dose increases.


Q: How can I tell if Laregab NT is working for my condition?

A: Regulatory studies assessed effectiveness based on patient-reported outcomes, specifically tracking changes in daily pain intensity scores. Monitoring effectiveness typically involves tracking how symptoms and related issues, like sleep interference due to pain, evolved during the clinical trials.


Q: Does Laregab NT affect memory or concentration?

A: Official regulatory labels list potential CNS adverse reactions, including dizziness, somnolence, and confusion. These effects are generally expected to impact a patient’s ability to pay attention and maintain concentration.


Q: How does Laregab NT affect the liver over time?

A: The safety profile notes that the Nortriptyline component is metabolized by the CYP2D6 enzyme in the liver. Official safety documentation lists potential, but typically rare, adverse reactions affecting liver enzymes or function, which are carefully monitored in clinical practice.

How should Laregab NT be stored and disposed of?

Laregab NT tablets must be stored according to specific regulatory requirements to maintain product stability and safety.

Storage Conditions

Storage Factor Official Requirement
Temperature Store below 30 C or at controlled room temperature (20 C to 25 C), and keep from freezing.
Environment Protect from light and moisture, storing in a cool, dry place.
Container Rule Keep the medicine in its original pack and maintain a tightly closed container.
Child Safety Must be stored out of the sight and reach of children and pets.
Stability Note If tablets are split, discard any unused half-tablets within 28 days.

Disposal Instructions

Unused or expired Laregab NT must be discarded properly. Official instructions state not to flush the medication down the toilet or throw it into the drain unless the accompanying labeling explicitly advises this method. Follow local household disposal procedures or take-back program guidelines for safe disposal.

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

Equivalent of Laregab NT found in:

A-Z Index: