Opiprol

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Opiprol

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Opiprol

What is Opiprol? Overview and Quick Facts

Opiprol is a prescription-only medication primarily categorized as an anxiolytic and antidepressant, used to stabilize emotional well-being and relieve inner tension. The Opiprol brand is a key commercial preparation of the substance Opipramol.

Property Description
Active ingredient Opipramol Dihydrochloride
Form Tablets
Pharmacological class Atypical Antidepressant, Anxiolytic
Common use Relief of anxiety and emotional distress
Origin Synthetic, Dibenzazepine derivative

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

Opiprol contains the active substance Opipramol Dihydrochloride, and its therapeutic classification places it uniquely among mood-stabilizing compounds. It is recognized as an atypical antidepressant because its primary action differs significantly from conventional antidepressants. The drug's efficacy in managing emotional and anxiety states is clinically recognized and supported by pharmacological studies.

Specifically, Opipramol is chemically classified as a dibenzazepine derivative, structurally similar to older tricyclic antidepressants (TCAs), yet it does not rely on potent monoamine reuptake inhibition. The pharmacological distinctiveness of Opipramol lies in its action as a sigma (sigma) receptor agonist. This atypical profile allows it to target a broader range of symptoms related to stress and anxiety, particularly in adult patients.


Opiprol Composition and Origin (Form and Substance)

Opiprol is a single-ingredient product featuring Opipramol Dihydrochloride as its sole pharmacological component, supplied primarily as tablets for oral administration. While Insidon was the original trade name for this compound, Opiprol serves as a widely available equivalent preparation in various markets. As a product of chemical synthesis, the active ingredient's synthetic origin guarantees a standardized, pure compound, ensuring consistent therapeutic results.

What is the General Purpose of Opiprol? (High-Level Benefit)

The fundamental purpose of Opiprol is to provide mood support and effective relief from chronic symptoms of anxiety and internal tension. A typical scenario for its use involves assisting individuals experiencing generalized tension or restlessness accompanying low mood. The drug's action profile is often described as biphasic, promoting prompt initial improvement in tension and sleep disturbances due to its strong calming effect, followed by a gradual improvement in mood stabilization. Its potent histamine H1 receptor antagonism contributes significantly to this distinct calming effect, which helps patients manage acute psychological distress and restlessness.

What side effects are possible with Opiprol?

The safety profile of Opiprol (Opipramol Dihydrochloride) is formally classified by regulatory authorities, with adverse reactions grouped by affected body system and frequency of occurrence. Safety classifications may vary by region; the following terminology is based on the Summary of Product Characteristics (SmPC) framework.

Frequency-Classified Adverse Reactions

The most Common side effects (≥1% to <10%) typically appear at the beginning of treatment and involve autonomic and nervous system effects. These include fatigue, dry mouth, nasal congestion, hypotension (decreased blood pressure), and orthostatic dysregulation (a sudden drop in blood pressure upon standing).

Uncommon side effects (≥0.1% to <1%) include dizziness, tremor, constipation, weight gain, micturition disturbances, and transient increases in liver enzymes. Effects classified as Rare or Very Rare are less frequently reported.

Serious Adverse Reactions and Safety Constraints

Adverse reactions classified as Very Rare (<0.01%) are documented as clinically significant events. These include severe systemic effects such as agranulocytosis (a blood disorder), seizures, and severe liver dysfunction or chronic liver damage, particularly associated with long-term exposure. Official regulatory documentation requires the monitoring of both blood counts and liver function tests due to these potential risks.

Safety constraints are defined in official labeling based on pre-existing conditions. Opiprol is generally not recommended for use in patients under 18 years of age. Caution is required in patients with pre-existing cardiovascular disorders due to the risk of intensifying conduction disturbances. The medication is contraindicated in individuals with known hypersensitivity to the substance, narrow-angle glaucoma, and conditions carrying a risk of acute urinary retention.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation for Opiprol (Opipramol) details the serious clinical manifestations that may occur following an overdose, which necessitate immediate medical attention and hospitalization.

Documented Overdose Manifestations

Overdose presentations are primarily characterized by severe central nervous system (CNS) depression and cardiovascular instability.

System Affected Documented Signs and Symptoms
CNS / Neurological Drowsiness, somnolence, stupor, coma, convulsions (seizures), agitation, delirium.
Cardiovascular Tachycardia, cardiac arrhythmias, hypotension, and ECG changes (QRS widening, QT prolongation).
Anticholinergic Mydriasis (dilated pupils), dry mouth, urinary retention.

Required Emergency Actions

Overdose is classified as potentially severe and life-threatening, with documented risks including cardiac arrest and respiratory failure. Regulators mandate that patients must seek immediate medical attention and require continuous ECG monitoring in a hospital setting.

Treatment is defined as symptomatic and supportive. There is no specific antidote known for Opipramol poisoning. Officially described procedures may include gastric lavage and the administration of activated charcoal. An increased risk of severity is noted in pediatric cases.

Therapeutic Uses of Opiprol

What Opiprol Treats: Main Uses and Benefits

Opiprol is primarily used as an anxiolytic to help manage persistent, generalized anxiety and significant inner tension or restlessness. The medication is commonly used for managing the symptomatic burden of conditions like Generalized Anxiety Disorder (GAD) and is relevant for easing chronic worry and apprehension. The medication generally provides support that helps ease the overall tension, contributing to improved day-to-day comfort during periods of heightened symptoms.

The medication is also relevant for managing symptom clusters, specifically sleep disturbances that stem from anxiety and tension, somatoform disorders (conditions where emotional distress manifests as physical symptoms), and anxious-depressive states (where low mood co-occurs with pronounced anxiety). Opiprol may assist with easing these symptoms, making it applicable in conditions marked by a mix of affective symptoms and heightened emotional tension. It helps maintain a sense of stability when symptoms become more noticeable and disruptive.

“Opiprol is commonly used to provide supportive relief for persistent psychic and somatic tension, offering assistance during episodes of increased distress.”

Quick Fact: Relief for Chronic Tension
Opiprol supports the management of inner tension and generalized restlessness, which are often symptoms that interfere with daily functioning.

Eligibility and Restrictions for Use

Who Can and Cannot Use Opiprol? — Official Regulatory Information

Official regulatory documents define strict criteria for the use of Opiprol (opipramol), establishing specific conditions under which the medicine must not be used, known as contraindications.

Contraindicated Populations and Conditions

Use of this medicine is prohibited in individuals with a known hypersensitivity or allergy to opipramol or any component of the formulation. It is strictly contraindicated for patients who are concurrently taking Monoamine Oxidase Inhibitors (MAOIs), requiring a minimum 14-day washout period when switching treatments. The use is also excluded for those experiencing acute intoxication (e.g., from alcohol, sedatives) or acute delirious states.

Furthermore, the medicine must not be used in the presence of certain physiological conditions, including untreated narrow-angle glaucoma, acute urinary retention, prostatic hypertrophy with residual urinary retention, paralytic ileus (bowel obstruction), or pre-existing severe atrioventricular blockages or diffuse conduction disturbances.

Restricted and Special Caution Groups

  • Age: Use is generally not recommended for the pediatric population (under 18 years), as safety and efficacy have not been fully established. It is indicated for use in adults.
  • Organ Function: Patients with severe hepatic (liver) or renal (kidney) impairment are typically contraindicated, while those with mild-to-moderate impairment or seizure disorders require special caution and clinical monitoring.
  • Pregnancy and Lactation: Use during pregnancy is generally advised only for compelling indications, especially in the first trimester. The medicine is contraindicated during breastfeeding, as opipramol passes into breast milk.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Opiprol's interaction profile is officially documented by specific pharmacokinetic and pharmacodynamic patterns, resulting in certain use restrictions and prohibitions. All interaction information is based strictly on government regulatory documents.


Formal Contraindications and Timing Rules

Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is formally contraindicated due to the risk of severe interaction. Regulatory labeling mandates a strict 14-day washout period when transitioning between Opiprol and any MAOI. Opiprol must not be initiated until 14 days after discontinuing an MAOI, and vice versa.


Metabolic and Exposure-Altering Interactions

Opiprol is primarily metabolized via the CYP2D6 enzyme system. Co-administration with medicinal products documented as strong inhibitors of CYP2D6 may lead to a pharmacokinetic interaction. This is officially described as resulting in a reduction in Opiprol's metabolic clearance, potentially causing an increase in its plasma concentration and systemic exposure. Specific examples of documented interacting inhibitors include Cimetidine, certain beta-blockers like Propranolol, Phenothiazines, and Tricyclic Antidepressants.


Pharmacodynamic Interactions

The simultaneous use of Opiprol with other Central Nervous System (CNS) Depressants (such as sedatives, hypnotics, or alcohol) is documented to result in an additive depressant effect. Additionally, Opiprol's co-administration with other Anticholinergic Agents may cause a reinforcement of anticholinergic effects.

Mechanism of Action

Opiprol (Opipramol Dihydrochloride) is an atypical psychoactive agent defined by its unique action on two primary, distinct molecular systems. The first mechanism involves the direct activation (agonism) of the Sigma-1 (sigma1) Receptor, a chaperone protein located predominantly in the endoplasmic reticulum of nerve cells . This sigma1 agonism modulates intracellular calcium signaling and neuronal excitability, indirectly influencing the release and balance of major neurotransmitters, thereby driving the sequence leading to sustained neurotransmitter balance modulation over time. The second critical mechanism is high-affinity antagonism (blockade) of the central Histamine H1 Receptor . Blocking the H1 receptor reduces signaling in the histaminergic pathway, which regulates arousal and vigilance. This swift modulation of the arousal system results in a calming physiological action characterized by reduced central vigilance. Opiprol also influences autonomic signaling patterns associated with physical tension through low-affinity antagonism of alpha1-adrenergic and D2 dopaminergic receptors, but it does not inhibit the reuptake of serotonin or norepinephrine.

Dosage and Administration Information

The use of Opiprol (Opipramol Dihydrochloride) is governed by specific instructions outlined in regulatory product information, strictly defining how the medication is administered.

Administration Scope

Category Official Guideline
Route of administration: Oral (by mouth), using the available tablet form.
Dosing schedule (Adults): The total approved daily dose ranges from 50 mg to 300 mg. Treatment is typically initiated at a low dose and adjusted within this range.
Timing in relation to meals: The tablets can be taken with or without food but should be consumed with some liquid.
Preparation requirements: Some tablet formulations possess good divisibility, which facilitates dose adjustment as prescribed.
Age-group administration rules: Older Adults: A lower initial dose may be necessary. Pediatric (Children > 6 years): Dosing is calculated at 3 mg per kg of body weight.
Special procedural conditions: Treatment should be discontinued by gradually tapering the dosage rather than stopping abruptly.

Instruction Classifications

Category Classification
Administration method type: Oral
Frequency pattern: Daily, usually administered in divided doses up to three times per day. A single 100 mg dose may be taken at night.
Regulatory basis: European national health agency and international prescribing information.
Use-context constraints: Regular, consistent intake is required to establish the full effect.

Resulting Procedural Structure

Official step sequence:

  • Begin administration at a conservative starting dose, usually split into multiple daily doses.
  • Consume the tablet with liquid, without regard to mealtimes.
  • Maintain regular dosing for a minimum of two weeks as the onset of effect is gradual.
  • Adjust the total dose up to the 300 mg maximum based on prescriptive need.
  • Discontinue treatment by implementing a gradual dose taper.

Connection to the overall use protocol (2–4 sentences):

The official use protocol is structured around a flexible adult dosing range of 50 mg to 300 mg daily, delivered via oral tablets. This procedure mandates a consistent, divided dosing schedule and requires gradual tapering during cessation, ensuring standardized administration and managed transition as outlined by regulatory guidelines.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Opiprol

This section outlines the types of official research that have studied Opiprol (Opipramol), describing the research frameworks and the aspects of the conditions that researchers examined. Research provides context about patterns observed so far in specific groups of people.


Evidence for use in Generalized Anxiety Disorder (GAD)

Research exploring Opiprol's evaluation in research scenarios involving periods of heightened symptoms, such as GAD, has primarily consisted of short-term Randomized Controlled Trials (RCTs). These RCTs compared Opiprol against a placebo (an inactive treatment) and, in some cases, against other active anxiolytic medications. These RCTs were designed to monitor how symptoms evolved in the observed populations during the defined time intervals.

Studies monitored outcomes related to both psychic (mental worry and apprehension) and somatic (physical symptoms like muscle tension or restlessness) anxiety, using standardized clinical scales. The research highlights changes measured during the study period, typically lasting about four to six weeks. Studies report how symptoms evolved in the observed populations based on short-term changes in measured anxiety severity.


Research on Somatic Symptoms and Somatoform Disorders

Opiprol was studied for conditions characterized by fluctuating or episodic manifestations where emotional distress may be linked to outcomes related to physical discomfort. Research in this area included controlled clinical trials that focused specifically on patient-reported outcomes describing perceived discomfort.

Findings indicate patterns related to the studied populations' experience of outcomes reflecting daily functioning or activity level. The existing evidence indicates that the overall quantity of controlled, large-scale research specifically targeting somatoform disorders remains limited. This research contributes to understanding symptom patterns based on how patients reported their experience within the specific and structured conditions of the short-term study.


What is Still Uncertain in the Research Landscape

The overall research base provides context but not individual predictions, and highlights what is known — and what is still uncertain. Several limitations apply to the current evidence:

  • Long-term effects are not fully established by extensive controlled trials; there is limited information for long-term outcomes regarding the long-term course of symptom activity.
  • The sample sizes were modest in the research exploring somatoform disorders and specific anxiety-related sleep issues.
  • Data for certain groups remain insufficient, especially for special populations like children or older adults.

Key Studies & References

  1. Opipramol Dihydrochloride (IUPHAR/BPS Guide to Pharmacology)

Frequently Asked Questions (FAQ)

Common questions about Opiprol (FAQ)


Q: Is Opiprol a sleeping pill, or is it just for anxiety?

Opiprol is officially classified as an anxiolytic (for anxiety) and an atypical antidepressant. Its action includes strong Histamine-H1 receptor blockade, which produces a calming effect and often results in fatigue or drowsiness. This characteristic supports its use for managing sleep disturbances and restlessness associated with anxiety, but it is not formally categorized as a primary hypnotic (sleeping pill).


Q: How long does it take for Opiprol to start working (onset of action)?

According to the official product information, patients may notice an immediate calming effect within the first few days of starting treatment. The full therapeutic benefit for mood stabilization and anxiety reduction may take at least one to two weeks of consistent use to become established.


Q: Where is the best place to store Opiprol tablets?

Official regulatory information advises that Opiprol must be stored in a cool, dry place, typically at temperatures not exceeding 30, C (86°F), protected from moisture and light. Consistent with all medications, the tablets must be kept in their original container and stored securely out of the sight and reach of children.


Q: Are there any natural supplements or herbal products that should be avoided with Opiprol?

The official product information specifically warns against combining Opiprol with other medications that slow down the Central Nervous System (CNS), such as alcohol or sedatives. Regulatory warnings indicate that products with CNS depressant effects could potentially enhance the sedative effects of Opiprol. Patients should review all supplements with a healthcare provider.


Q: Can Opiprol be used to treat symptoms of depression?

While Opiprol is categorized as an atypical antidepressant, its officially approved indications focus on the treatment of Generalized Anxiety Disorder (GAD) and specific somatoform disorders. The clinical focus of its approved use is primarily on relieving inner tension, emotional distress, and associated physical symptoms.


Q: What should I do if I miss a dose of Opiprol?

Regulatory labeling advises against taking a double dose to compensate for a forgotten dose. If a dose is missed, a user should continue with the regular dosing schedule at the next prescribed time and should consult their healthcare provider for personal guidance on missed doses.


Q: Is Opiprol considered addictive or habit-forming?

Official drug documents do not use the term 'addictive.' However, they explicitly state that treatment cessation must not be stopped suddenly. It is required that treatment cessation be conducted through a gradual dose taper to help prevent potential withdrawal effects.


Q: What happens if I take too much Opiprol (overdose symptoms)?

Documented signs of an overdose include symptoms that may require immediate medical attention, such as severe drowsiness, agitation, coma, convulsions, fast heart rate (tachycardia), and low blood pressure (hypotension).


Q: What is the typical timeframe for Opiprol treatment before a doctor discontinues it?

Official regulatory guidance states that the duration of Opiprol treatment is determined by the healthcare provider based on the patient's individual condition. The guidance emphasizes that the medication requires a consistent, regular intake to be effective and that any eventual discontinuation must be managed through a gradual dose taper.

How should Opiprol be stored and disposed of?

Storage and Disposal Requirements for Opiprol

Official regulatory guidelines mandate specific conditions for the storage and disposal of Opiprol (Opipramol Dihydrochloride) to ensure its quality and prevent environmental harm.

Storage Requirements

Opiprol must be kept in a cool, dry, and well-ventilated place with the container tightly closed to protect the tablets from moisture. Consistent with all prescription medicines, the product must be stored securely, out of the sight and reach of children.

Storage Constraint Requirement
Environment Cool, dry, well-ventilated, away from food.
Container Must be kept tightly closed.
Safety Keep out of the sight and reach of children.

Disposal Instructions

Opiprol is classified as toxic to aquatic life, meaning it must not be flushed down a toilet or sink. Unused or expired medication should be disposed of via an official drug take-back program or mail-back service. If household trash disposal is necessary, the tablets must be mixed with an undesirable substance (e.g., used coffee grounds), sealed in a container, and then placed in the trash.

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

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