Imipramina L.CH.

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Imipramina L.CH.

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Method of action: Antidepressant, Psychoanaleptics

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Overview of Imipramina L.CH.

Property Description
Active ingredient Imipramine Hydrochloride
Form Oral Tablet or Capsule
Pharmacological class Tricyclic Antidepressant (TCA)
General purpose Stabilizing mood and nerve signal modulation
Origin Synthetic (Chemically synthesized)

What Type of Medication is Imipramina L.CH.?

Imipramina L.CH. is a prescription medication whose core active component is the substance Imipramine, classifying it as a Tricyclic Antidepressant (TCA). This specific formulation is typically manufactured by Laboratorio Chile (L.CH.). This medication is recognized as a prototypical agent within the TCA family, specifically belonging to the Tertiary Amine TCA subgroup. This classification means it is one of the original and foundational drugs used to chemically modulate central nervous system activity. Unlike newer, highly selective drugs, Imipramina L.CH. is known as a non-selective monoamine reuptake inhibitor. Imipramine belongs to the class of N06A antidepressants which primarily function by affecting nerve transmission. This approach is clinically recognized for providing therapeutic support in managing persistent low mood and anxiety.


Composition, Origin, and Available Forms

The medication is a synthetic, single-ingredient product containing Imipramine Hydrochloride and is provided for the oral route of administration. Imipramine itself is a chemically synthesized dibenzazepine-derivative compound, ensuring consistent composition and potency. As a single-entity drug, its effects are solely derived from this compound. Imipramina L.CH. is typically supplied in solid oral dosage forms, which include both tablets and capsules. Imipramine is categorized as an antidepressant for clinical use. For instance, this medication is often utilized in cases requiring stabilization of mood when simpler, first-line treatments are insufficient.


How Does Imipramina L.CH. Generally Help?

Imipramina L.CH. generally helps by stabilizing mood and alleviating symptoms of severe low mood through chemical rebalancing in the brain. Its purpose as an antidepressant is achieved by its primary mechanism: it intercepts the nerve cells from immediately reabsorbing the chemical messengers serotonin and norepinephrine. This action sustains the availability of these key regulators in the nerve connections, which is vital for maintaining a healthy and stable emotional state. This therapeutic benefit is also leveraged to manage certain chronic nerve signals and specific involuntary muscle actions.

Regulatory References

  1. NIH — MedlinePlus Drug Information for Imipramine
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What side effects are possible with Imipramina L.CH.?

Possible Side Effects and Safety Information

The safety profile for Imipramina L.CH. (Imipramine Hydrochloride) is defined by officially documented patterns of adverse reactions, which are classified by their frequency and the physiological system affected, consistent with its classification as a Tricyclic Antidepressant.

Adverse Reaction Frequency

Adverse effects are formally categorized in regulatory documentation based on how often they have been reported in clinical use:

  • Very Common (Affecting 1 in 10 or more): Dry mouth, blurred vision, hyperhidrosis (sweating), tremor, and constipation.
  • Common (Affecting 1 in 100 to less than 1 in 10): Tachycardia (increased heart rate), postural hypotension (dizziness upon standing), somnolence, fatigue, anxiety, and weight gain.

Systemic Safety Profile

Side effects are grouped by System-Organ Class (SOC) in official prescribing information:

  • Cardiac and Vascular Disorders: Potential effects include tachycardia, palpitations, arrhythmias, and postural hypotension.
  • Nervous System Disorders: Reactions commonly involve tremor, dizziness, and somnolence, with rare potential for seizures (convulsions).
  • Gastrointestinal Disorders: Frequent effects include dry mouth and constipation, with a rare potential for a serious impairment of intestinal movement known as paralytic ileus.

Serious Adverse Reactions and Safety Constraints

Regulatory documents highlight several serious adverse reactions, which may occur rarely, including severe cardiac conduction disturbances, agranulocytosis (a severe decrease in white blood cells), and hepatitis (severe liver function abnormality).

Key safety constraints define specific situations where the medicine should not be used. It is strictly contraindicated during the acute recovery period following a myocardial infarction and is not to be used concurrently with Monoamine Oxidase Inhibitors (MAOIs).

Official safety notes indicate that certain effects, such as dry mouth and somnolence, may be more pronounced during the initial phase of treatment or after an adjustment in dosage. Furthermore, older adults are specifically noted as being more susceptible to both the anticholinergic and cardiovascular effects of the medicine.

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Overdose and Emergency Response

Imipramina L.CH. Overdose and when to seek help

Overdosage with Imipramine Hydrochloride is a serious medical emergency, with signs of toxicity developing rapidly, often within six hours of ingestion. Due to the high risk of severe complications, official regulatory information mandates that patients seek medical help right away if an overdose is suspected and immediately contact emergency services or a national Poison Control Center.

System Affected Documented Overdose Manifestations
Cardiovascular Rapid or irregular heartbeat (tachycardia, arrhythmia), low blood pressure (hypotension), shock, and QRS interval widening.
Central Nervous System Confusion, agitation, seizures (convulsions), delirium, and progression to coma.
Specific Risk Notes Children are reported to be more sensitive than adults to an acute overdosage.

The regulatory basis emphasizes that deaths may occur from overdosage, primarily due to fatal cardiac rhythm disturbances and profound hypotension. For this reason, hospital monitoring is required immediately upon suspicion of overdosage. Management is symptomatic and supportive, focusing on continuous ECG monitoring and interventions such as the administration of activated charcoal. No specific antidote is known for the Imipramine compound.

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Therapeutic Uses of Imipramina L.CH.

What Imipramina L.CH. Treats: Main Uses and Benefits

Imipramina L.CH. is commonly used to help manage symptoms across distinct therapeutic domains. The medication may be part of symptomatic management in situations where patients experience heightened distress or functional strain.

Core Therapeutic Focus

This medication is applied across domains where additional symptomatic support is needed, most commonly in the context of Major Depressive Disorder, Panic Disorder, and Agoraphobia. It is also relevant for easing symptoms related to neuropathic pain syndromes and is applied in situations requiring supportive symptom management, relevant to functional issues in appropriate patient groups.

Imipramina L.CH. helps manage symptom clusters that may become intense or disruptive, including persistent low mood, significant fatigue, recurrent panic, and chronic nerve discomfort. This support contributes to easing the overall symptom load during difficult episodes, which assists with maintaining functional stability.

“This approach provides support that helps ease the overall symptom burden, particularly when symptoms interfere with daily comfort.”

Benefits and Clinical Contexts

In clinical settings marked by heightened symptoms, this application helps patients cope more steadily with disruptive manifestations. For instance, in mood disorders, it assists with maintaining emotional stability; in contexts involving increased discomfort or tension, it contributes to improved comfort during periods of heightened symptoms; and in chronic pain, it is relevant for easing persistent discomfort.

Quick Fact: Supportive Management for Symptom Clusters
Imipramina L.CH. is applied in conditions characterized by periods of heightened symptoms associated with depression, assists with maintaining functional stability.

Regulatory References

  1. NIH MedlinePlus overview on Imipramine
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Eligibility and Restrictions for Use

Who can and cannot use Imipramina L.CH.?

Regulatory documentation defines strict eligibility rules for Imipramina L.CH. (Imipramine Hydrochloride) based on age, existing health conditions, and co-administration with other medications.

Absolute Contraindications

The medicine is contraindicated (must not be used) in populations with known hypersensitivity to imipramine or related compounds, patients in the acute recovery period following a myocardial infarction, or those currently using or having recently used a Monoamine Oxidase Inhibitor (MAOI). Use is also contraindicated in individuals with Brugada syndrome.

Population Restrictions and Conditional Use

Population Group Regulatory Status
Adults (MDD) Approved for use.
Children 6+ (Enuresis) Approved for this specific indication only.
Children under 6 Safety and efficacy not established.
Pregnant or Lactating Not recommended due to potential risk and passage into breast milk.
Cardiovascular Disease Use requires special caution and monitoring.
Hepatic or Renal Impairment Use requires caution due to altered drug clearance.

Eligibility is limited for adolescents and young adults (under 25) due to a mandatory warning regarding increased risk of suicidal thoughts and behaviors. Patients with a history of seizure disorders or mania require cautious use.

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What should I know about interactions with other medicines?

The regulatory profile for Imipramina L.CH. identifies several classifications of officially documented interactions, which define the constraints for co-administration.

Contraindicated Combinations and Timing Rules

Co-administration with Monoamine Oxidase Inhibitors (MAOIs), including Linezolid and Intravenous Methylene Blue, is strictly contraindicated. This prohibition is due to the documented risk of severe pharmacodynamic potentiation, such as Serotonin Syndrome. A mandatory washout period of at least 14 days, or up to three weeks depending on the regulatory source, must separate the discontinuation of one medicine before starting the other.

Pharmacokinetic Alterations

  • Increased Exposure: Substances that inhibit the liver enzymes CYP2D6 and CYP2C19 (e.g., Methylphenidate, certain SSRIs) are officially documented to increase the plasma concentrations of Imipramine.
  • Decreased Exposure: Enzyme inducers (e.g., Carbamazepine, Phenytoin, Nicotine) accelerate metabolism, leading to lowered plasma concentrations and reduced effectiveness.
  • Population Note: CYP2D6 Poor Metabolizers are expected to have higher than average systemic levels.

Other Pharmacodynamic Effects

  • Additive CNS Depression: Documented when combined with alcohol or general CNS depressants.
  • Adrenergic Interference: Officially noted to block the pharmacological effects of certain adrenergic-blocking antihypertensive agents (e.g., guanethidine, clonidine).
  • Cardiac Effects: Co-administration with thyroid preparations is documented to aggravate unwanted cardiac effects.
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Mechanism of Action

Dual Reuptake Inhibition of Monoamines

Imipramina L.CH. primarily exerts its action as a non-selective inhibitor of the Serotonin Transporter (SERT) and the Norepinephrine Transporter (NET), which are located on the presynaptic neuronal membrane. Blocking these transporters prevents the reabsorption of the neurotransmitters serotonin and norepinephrine from the synaptic cleft. This leads to a prolonged presence and sustained elevation of these monoamines in the synapse, driving enhanced signaling through postsynaptic receptors. This mechanistic domain is essential for the sustained modulation of monoaminergic signaling patterns within key neural circuits, shaping the resulting physiological response patterns.

Non-Selective Receptor Antagonism

This drug also exhibits secondary mechanistic activity through competitive antagonism at various receptors. It blocks muscarinic cholinergic receptors, H1 histamine receptors, and alpha1 -adrenergic receptors. This secondary action interferes with distinct signaling pathways in both the central and peripheral nervous systems. The resulting physiological effects include a reduction in parasympathetic tone (anticholinergic effects) and central nervous system (CNS) depression, which are distinct physiological consequences arising from this mechanistic domain.

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Dosage and Administration Information

Official Administration Guidelines

Imipramina L.CH., containing Imipramine, is approved for oral administration using designated tablets or capsules. The use of this medication is guided by specific dosing and scheduling protocols.


Dosage Protocol and Schedule

Treatment must be initiated with a low daily dose, which is then gradually and cautiously increased toward an optimal maintenance range, as full therapeutic effects may take one to three weeks or longer to become evident. The total daily dosage can be administered as a single dose at bedtime or in divided doses. The medication may be taken with or without food.

Patient Population Initial Daily Dose (Tablets) Maximum Daily Dose
Adult Outpatients 75 mg 200 mg
Adult Hospitalized 100–150 mg 300 mg
Older Adults (Geriatric) 25–50 mg 100 mg

Specific Use Instructions

Population Adjustments: Older adults require a significantly lower starting dose and a lower maximum daily dose compared to younger adults. For its approved use in pediatric enuresis (children 6 years and older), a specific dose (e.g., 25 mg daily) is administered one hour before bedtime, and a maximum limit of 2.5 mg/kg daily should not be exceeded.

Discontinuation: The duration of use is often long-term, and when stopping the medication, the dosage is required to be tapered off gradually rather than being abruptly discontinued. If a dose is missed, it should be taken as soon as remembered, unless it is almost time for the next scheduled dose, in which case the missed dose should be skipped.

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Recent Clinical Evidence

Imipramina L.CH. (imipramine) is a tricyclic antidepressant primarily investigated for the treatment of Major Depressive Disorder (MDD) and nocturnal enuresis (bedwetting) in children.


Evidence for Major Depressive Disorder

Clinical trials have long established imipramine's role in the management of depressive symptoms. Comparative studies have investigated its efficacy against newer classes of antidepressants, such as SSRIs (Selective Serotonin Reuptake Inhibitors).

  • Efficacy Comparisons: Some randomized trials have shown that imipramine demonstrated comparable antidepressant outcomes to agents like paroxetine in outpatients with MDD. However, these trials also reported a higher incidence of classic anticholinergic side effects associated with imipramine therapy.
  • Chronic Depression: Studies involving patients with chronic depression (dysthymia, or MDD lasting over two years) have indicated that imipramine, compared to placebo, showed favorable response rates in reducing long-standing symptoms of moderate severity.

Evidence for Nocturnal Enuresis

Imipramine is used in pediatric practice for the management of nocturnal enuresis in children aged six years and older. Research findings underscore its symptomatic effect during treatment.

  • Effect vs. Placebo: Controlled studies have reported that imipramine resulted in a reduction in wet nights per week compared to placebo during the active treatment period. It is often reserved for cases that have not responded to first-line treatments like bedwetting alarms and desmopressin.
  • Sustainability: Evidence from follow-up periods suggests that the therapeutic effect of imipramine in treating nocturnal enuresis is typically not sustained after the cessation of treatment, with high relapse rates observed in several studies.

Emerging Research Areas

While the main indications remain MDD and enuresis, ongoing Phase II clinical trials are exploring the potential role of imipramine in oncology. One area of investigation is its use in combination with chemotherapy for recurrent glioblastoma, examining its effects on progression-free and overall survival rates in this specific population.

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Frequently Asked Questions (FAQ)

Common questions about Imipramina L.CH. (FAQ)


Q: What is the main difference between Imipramina L.CH. and other common antidepressants?

Official classifications identify Imipramina L.CH. as a Tricyclic Antidepressant (TCA). Unlike newer, more selective drugs, it is described in official product information as a non-selective inhibitor. This means it affects the chemical messengers serotonin and norepinephrine, and also blocks several receptors like muscarinic and histamine receptors, which influences its therapeutic effects and safety profile.


Q: How long does it usually take to feel a difference after starting Imipramina L.CH.?

Regulatory information indicates that the full therapeutic effects of the medication may take time to become evident. Official regulatory information describes this onset period as typically taking one to three weeks or longer after starting treatment.


Q: Can Imipramina L.CH. affect my weight?

Yes, official documentation lists weight gain as a common adverse reaction associated with this medication. This finding is based on data collected during clinical use.


Q: Does Imipramina L.CH. have a risk of dependence or addiction?

Official instructions do not classify this drug as having a high risk of addiction in the same way as controlled substances. However, official instructions specify that the dosage should be tapered off gradually when discontinuing treatment. This measure is described as necessary to help manage discomfort or symptoms associated with sudden cessation.


Q: Is it safe to take Imipramina L.CH. if I also take a pain reliever?

Official drug interaction warnings caution that combining Imipramina L.CH. with general Central Nervous System (CNS) depressants can lead to additive effects. This interaction can result in increased sedation, dizziness, or confusion.


Q: What does L.CH. mean in the drug name?

The abbreviation L.CH. refers to Laboratorio Chile, which is the manufacturer that produces this specific formulation of the drug containing the active ingredient, imipramine.


Q: Is it normal to feel more anxious when first starting Imipramina L.CH.?

Official documentation lists anxiety as a common adverse reaction. Furthermore, regulatory safety notes indicate that some side effects may be more pronounced during the initial phase of treatment or following any adjustment in dosage.


Q: What should I do if the side effects of Imipramina L.CH. feel too strong?

Regulatory information defines specific serious adverse reactions that are documented to require immediate medical attention. These include severe symptoms such as major cardiac changes, signs of a severe allergic reaction, or fever accompanied by a sore throat.


Q: Is Imipramina L.CH. okay to use if I have glaucoma?

Regulatory safety information indicates that caution is noted for patients with a history of angle-closure glaucoma. This is due to the documented potential for the medication to increase pressure inside the eye.


Q: What is the risk of withdrawal symptoms when stopping Imipramina L.CH.?

The risk of experiencing discomfort or symptoms associated with stopping the medication is managed by official instructions. These instructions describe the need for the dosage to be tapered off gradually over time, rather than abruptly discontinued.


Q: Does Imipramina L.CH. interact with herbal supplements like St. John's Wort?

Official drug interaction sections list caution regarding substances that affect the CYP2D6/2C19 liver enzymes or increase the activity of serotonin. This is documented due to the risk of a serious reaction called Serotonin Syndrome or altered drug levels.


Q: Are the side effects of Imipramina L.CH. permanent?

Regulatory documents note that anticholinergic effects, such as dry mouth and somnolence (drowsiness), may be more transient (short-lived) and pronounced initially. However, official information also documents the potential for rare, serious long-term effects, such as cardiac conduction disturbances.


Q: How long is the typical treatment time with Imipramina L.CH.?

Official instructions describe the duration of use as often long-term for the management of depressive symptoms. The decision to discontinue the medication is clinical, and official instructions specify that the process should occur gradually.


Q: Can taking Imipramina L.CH. affect my sleep schedule?

Yes, official documentation lists somnolence (drowsiness) as a common adverse reaction. For this reason, official dosing guidelines often include the option for patients to take the total daily dosage as a single dose at bedtime.


Q: Are there any common tests or monitoring needed while taking Imipramina L.CH.?

Official regulatory information documents the potential for effects on the heart rhythm and blood cell counts. Due to these potential effects, monitoring of these systems may be indicated, and therapeutic drug monitoring of plasma levels is sometimes utilized.


Q: Can Imipramina L.CH. cause sexual side effects?

Sexual dysfunction is a recognized potential adverse reaction associated with the class of medications known as tricyclic antidepressants, according to official safety information.


Q: Can Imipramina L.CH. affect liver function?

Regulatory information documents a rare potential for serious liver function abnormality, such as hepatitis. For individuals with existing hepatic impairment (poor liver function), official product information indicates that caution is necessary during use.


Q: Is it possible to have an allergic reaction to Imipramina L.CH.?

Yes, known hypersensitivity to imipramine or related compounds is listed as an absolute contraindication in regulatory documents. Furthermore, official safety data describes the signs of severe allergic reactions as a potential serious adverse effect.


Q: Is it necessary to avoid sun exposure while taking Imipramina L.CH.?

Official safety cautions include a note that exposure to both direct sun and artificial UV light (such as sunlamps or tanning beds) may need to be avoided during the use of this medication due to the potential for photosensitivity.

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How should Imipramina L.CH. be stored and disposed of?

How to Store and Dispose of Imipramina L.CH.?

Official regulatory information defines strict requirements for storing and discarding Imipramina L.CH. (Imipramine Hydrochloride) to maintain product stability and ensure public safety.

Official Storage Requirements

Condition Requirement
Temperature Store at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). Avoid excess heat.
Protection Keep the medication protected from light and excess moisture. Store in its tightly closed container.
Stability Note Marked discoloration is associated with a loss of product potency and stability.

Child Safety and Disposal Rules

This medication must be kept out of the sight and reach of children and officially stored locked up. Disposal of unused or expired product must follow local/national regulations. It is prohibited to discard the medication into drains or water courses to prevent environmental contamination.

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

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