Grandaxin

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Grandaxin

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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 Grandaxin

Property Description
Active ingredient Tofisopam
Form Tablet (Oral preparation)
Pharmacological class Anxiolytic agent, Atypical benzodiazepine
Common use Relief of anxiety and emotional tension
Origin Synthetic, Benzodiazepine derivative

What is Grandaxin and What Class Does It Belong To?

Grandaxin is the trade name for a synthetic prescription medicine containing the single active ingredient known as Tofisopam (INN). The drug is fundamentally classified as an anxiolytic agent, placing it within the pharmacological group of psychotropic medications used to manage anxiety and emotional tension.

Tofisopam is structurally defined as an atypical benzodiazepine derivative, belonging specifically to the 2,3-benzodiazepine family. This classification reflects its unique chemical structure. This specific derivative structure ensures that its mechanism of action and subsequent effects are distinct from those observed with more common, conventional benzodiazepines.

Tofisopam: A Selective, Non-Sedating Anxiolytic

The primary general purpose of Tofisopam is to function as a selective anxiolytic by targeting states of anxiety and persistent emotional tension. This unique profile is clinically recognized for achieving a calming effect without causing substantial muscle-relaxant activity or notable sedation. This non-sedating and non-myorelaxant property is the drug's most differentiating feature.

This distinct action is beneficial in managing anxiety and inner unrest while allowing the individual to maintain their normal mental clarity and continue with daily activities, as the compound minimizes generalized depressant effects on the central nervous system.

Preparation Form and Entity Type

Grandaxin is manufactured as an oral preparation and supplied exclusively in the form of tablets. The medication is a monopreparation, consisting solely of the active ingredient Tofisopam combined with standard solid excipients required to create the tablet matrix. This formulation ensures precise delivery for systemic absorption, focusing the therapeutic effect solely on the selective anxiolytic action of the active component.

What side effects are possible with Grandaxin?

Possible Side Effects and Safety Information

The safety profile of Tofisopam (Grandaxin) is formally classified by regulatory authorities based on documented clinical experience, detailing potential adverse reactions and necessary usage constraints. The documented adverse reactions are grouped by the affected physiological system, following the System-Organ-Class (SOC) structure established in official labeling.


Documented Adverse Reactions

Adverse effects are most commonly reported in the Gastrointestinal and Nervous Systems. Commonly reported reactions include drowsiness, dizziness, nausea, vomiting, dry mouth, loss of appetite, constipation, headache, agitation, and general symptoms like malaise and lassitude. Skin and Subcutaneous Tissue disorders, such as rash, itching, and facial edema, are also noted in official documents.


Serious Adverse Reactions and Restrictions

Official regulatory documents classify certain reactions as serious due to their clinical impact. These include cholestatic jaundice (a liver disorder), respiratory depression (particularly when combined with other central nervous system depressants), and the occurrence of seizures in patients with pre-existing epilepsy.

The medication is contraindicated in individuals with hypersensitivity to benzodiazepines, decompensated respiratory insufficiency, and a history of sleep apnea. Caution is explicitly required in patients with hepatic or renal impairment and in older adults, as the incidence of unwanted effects may increase.


Population-Specific Safety

Regulatory safety statements specify that the drug is not recommended during the first trimester of pregnancy and is contraindicated during lactation as the active ingredient is excreted into breast milk. Furthermore, the safety and efficacy of Tofisopam have not been established in the pediatric population (under 18 years of age).

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Tofisopam (Grandaxin) overdose is defined by the risk of Central Nervous System (CNS) depression. Documented manifestations include somnolence, sedation, ataxia (lack of coordination), slurred speech, and intellectual impairment. The most serious outcome documented is depression of respiration and associated respiratory compromise, which is a life-threatening risk following large ingestions.

Immediate medical attention is required upon suspicion of overdose, particularly when signs of severe CNS depression or respiratory difficulty are noted. The mandated management is strictly symptomatic and supportive treatment within a healthcare setting. Clinical observation is required, including monitoring of vital signs, blood glucose, and ECG to manage potential complications.

The specific antagonist, Flumazenil, is available but is officially not recommended for routine reversal. Its use is strictly reserved for severe cases with respiratory or cardiovascular complications, as regulatory constraints cite a documented risk of inducing seizures and cardiac dysrhythmias. For decontamination, activated charcoal is the preferred measure, while emesis (inducing vomiting) is officially contraindicated. Official labeling notes that the elderly and very young children have increased susceptibility to the CNS depressant effects in overdose.

Therapeutic Uses of Grandaxin

What Grandaxin Treats: Main Uses and Benefits

The therapeutic role of Tofisopam (Grandaxin) is focused on supporting the management of emotional distress and associated physical symptoms. The compound is classified as an anxiolytic agent, and its use is considered relevant for the symptomatic management of anxiety and alcohol withdrawal. It is commonly used for conditions characterized by persistent emotional tension, neurotic states, and vegetative (autonomic) dysfunction.

The medication helps address symptom clusters that may become intense or disruptive, such as worry, apprehension, heightened irritability, and physical symptoms like palpitations or tremor. This provides support that helps ease the overall symptom burden, particularly for patients requiring functional preservation.

“The primary benefit is supportive symptomatic relief, which may assist with functional stability and contribute to the ability to maintain daily routines.”

Grandaxin is relevant for addressing these symptoms and is noted for its lower risk of significant sedation or muscle relaxation. This is considered relevant in clinical settings where supportive relief is needed but the patient generally needs to maintain alertness, assisting with functional stability during work or complex daily tasks.


Quick Fact: Relief for Emotional and Vegetative Symptoms
Commonly used in: Neurotic states, persistent emotional tension, and physical symptoms associated with autonomic dysfunction.
Key Benefit: Supports functional stability by offering symptomatic relief that does not typically cause significant sedation.

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Grandaxin (Tofisopam)

The official regulatory profile for Tofisopam (Grandaxin) explicitly defines populations who must not use the medicine.

Contraindicated Populations

Use is strictly prohibited for patients with hypersensitivity to any benzodiazepine or tablet component. The medicine is also contraindicated in patients with conditions such as acute narrow-angle glaucoma, decompensated respiratory insufficiency, sleep apnea, or coma. Severe organ dysfunction, including severe liver impairment, also constitutes a formal contraindication. Concomitant use with specific immunosuppressants, including Tacrolimus, Sirolimus, or Cyclosporine, is prohibited.

Age and Life-Stage Restrictions

Age-related eligibility rules
Adults: The primary authorized population.
Under 18: Use is not established and not recommended in children or adolescents.
Elderly: Use requires caution due to increased susceptibility to effects.
Pregnancy and Lactation Eligibility
Pregnancy: Generally contraindicated (advised against, especially in the first trimester).
Breastfeeding: Use is contraindicated as the drug is excreted into breast milk.

Conditional Use

Caution is required when prescribing to patients with non-severe renal or hepatic impairment, certain organic brain disorders, or non-decompensated chronic respiratory insufficiency.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Tofisopam (Grandaxin) is documented to be involved in several pharmacokinetic and pharmacodynamic interactions as defined in authorized regulatory sources.

Contraindicated Combinations

Co-administration of Tofisopam is strictly contraindicated with the immunosuppressive medicines Tacrolimus, Sirolimus, and Cyclosporine. This restriction is based on Tofisopam's formal role as an inhibitor of the CYP3A4 enzyme, which may significantly increase the plasma concentrations of these co-administered products.


Exposure-Modifying and Pharmacodynamic Interactions

The drug's interaction profile involves two major mechanisms: altering drug metabolism and potentiation of central nervous system (CNS) effects. Tofisopam may increase the plasma concentrations of other CYP3A4 substrates, including Digoxin. Conversely, Tofisopam's own plasma level may be increased by enzyme inhibitors like Ketoconazole, Itraconazole, Cimetidine, and Oral Contraceptives.

Co-administration with CNS depressants (e.g., alcohol, opioid analgesics, neuroleptics, or certain antidepressants) may result in a mutual potentiation of effects, officially noted as an enhancement of sedation. Substances like Alcohol and Nicotine are also formally documented as metabolic inducers that can decrease Tofisopam's plasma concentrations.

Mechanism of Action

The mechanism of Tofisopam (Grandaxin) is defined by its selective action as an isoenzyme inhibitor, distinct from conventional GABA-A receptor modulation.

Targeting Cyclic Nucleotide Phosphodiesterases (PDEs)

The molecule functions as an inhibitor of specific Phosphodiesterase (PDE) enzymes in the central nervous system, particularly PDE-4A1 and PDE-10A1. By inhibiting these enzymes, Tofisopam slows the breakdown of the second messengers cyclic adenosine monophosphate ( cAMP) and cyclic guanosine monophosphate ( cGMP), leading to increased intracellular concentrations of both. This modulation of second messenger cascades stabilizes neuronal excitability within the limbic and cortical pathways.

Selective Central Nervous System Modulation

Tofisopam exhibits negligible affinity for the classical GABA-A receptor binding site. This absence of interaction means the drug does not enhance the inhibitory GABAergic system via the primary mechanism used by classic benzodiazepines. This mechanistic constraint results in a physiological profile characterized by selective central nervous system modulation without inducing generalized central nervous system depression, marked sedation, or muscle-relaxant effects. The differential stabilization of central neural pathways also influences the activity of the sympathetic (autonomic) nervous system outflow, dampening central hyper-arousal signaling.

Dosage and Administration Information

Instruction Map: How to use Grandaxin

This map formalizes the usage instructions for Grandaxin (Tofisopam), focusing on the procedural aspects of administration.


Administration Scope

Property Value
Route of administration By mouth (Oral)
Dosing schedule The adult daily dose ranges from 50 mg up to a maximum of 300 mg. The usual single dose is 50 mg or 100 mg.
Timing in relation to meals (if applicable) The tablet may be taken with or without food.
Preparation requirements (if applicable) The tablet should be swallowed whole, generally with a full glass of water, and should not be crushed or chewed.
Age-group administration rules Older Adults: Requires careful use, and a lower dosage regimen may be necessary. Pediatric Use (Under 18): Not recommended, as safety and efficacy are not established.
Missed-dose rules If a dose is missed, take it as soon as possible, but skip it entirely if it is near the time for the next scheduled dose. Do not double the dose.
Special procedural conditions Treatment is generally intended for a specified duration, with a recommended maximum course of 12 weeks.

Instruction Classifications (High-level)

Property Value
Administration method type Oral (Tablet)
Frequency pattern Multiple times per day; typically administered in divided doses up to three times a day.
Use-context constraints Must not be used in pediatric patients (under 18); requires dose adjustment for older adults.

Resulting Procedural Structure

Step sequence:

  • Take the prescribed 50 mg or 100 mg single dose by mouth.
  • Swallow the tablet with a full glass of water.
  • Repeat the dose up to three times daily, ensuring the total daily intake does not exceed 300 mg.
  • If a scheduled dose is missed, do not take an extra dose to make up for the missed one.

Connection to the overall use protocol: These instructions define the standardized procedure for the oral administration of Grandaxin. They specify the route (oral tablet), the maximum daily quantity, the divided dose frequency, and the specific patient groups requiring adjustment or exclusion, thereby structuring the entire use protocol.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Grandaxin (Tofisopam)


Evidence for Managing Anxiety and Neurotic Conditions

Research has examined studies exploring symptoms related to anxiety disorders, neurotic states, and associated autonomic (vegetative) dysfunction. The research base includes short-term Randomized Controlled Trials (RCTs) and open-label clinical studies. These studies primarily monitored changes in symptom intensity using standardized rating tools, focusing on how symptoms related to anxious mood and physical discomfort evolved in the observed populations.

The studies report how symptoms evolved over periods generally lasting only a few weeks. In these timeframes, findings describe patterns observed in the studies. However, the evidence base is limited by the fact that many key trials are from an older body of literature. The sample sizes were modest in several randomized studies, which means the results apply only to the populations studied and provide limited context for broader patient groups.


Comparative Research on Functional and Psychomotor Impact

A specific area of research has evaluated the drug’s effects on psychomotor skills and daily functioning—outcomes related to activity level and mental clarity. Studies explored this by using randomized, comparative trials that included healthy adult volunteers and patients with anxiety. These studies were designed to measure whether the drug had an impact on reaction time, coordination, and cognitive performance when compared to placebo and to other medicines commonly used for anxiety.

The findings indicate patterns where functional outcomes were measured against conventional benzodiazepine comparators. Research has described a pattern where participants experienced minimal impairment of cognitive abilities or motor skills compared to the impairments observed with other anxiolytics in the studies. The follow-up durations were limited in this research, typically covering only single-dose or very short-term exposure.


What is Still Uncertain About the Research for Grandaxin

Research contributes to the broader evidence landscape, but evidence quality varies across studies, and the research base is influenced by studies conducted decades ago. Critically, there is limited information for long-term outcomes for this medicine, meaning that effects and changes over a year or more are not fully established. Data for certain groups remain insufficient, and subgroup findings are uncertain, as clinical research has primarily focused on studies involving the general adult population.

Key Studies & References

  1. A Comparison of the Anxiolytic Properties of Tofisopam and Diazepam: A Double-Blind, Randomized, Crossover, Placebo-Controlled Pilot Study (2024)
  2. Tofisopam - Wikipedia (General information, regulatory status, and clinical data overview)

Frequently Asked Questions (FAQ)

Common questions about Grandaxin (FAQ)

Q: How quickly does Grandaxin start to work after taking it?

According to official pharmacokinetic data, the active ingredient typically reaches its highest concentration in the blood within 1 to 2 hours after the tablet is taken by mouth. This indicates the general timeframe for when the drug is circulating in the body.

Q: How long does the effect of a single Grandaxin tablet last?

Grandaxin has a relatively short duration of action, with an elimination half-life generally ranging from 3 to 8 hours. Due to this short duration, the drug is formulated to be taken in divided doses, typically multiple times per day.

Q: What is the typical timeframe before noticing the full benefits of Grandaxin?

Official product information notes that treatment is often for short-term periods, with some regulatory sources citing a maximum recommended course of 12 weeks. Clinical studies examining the drug's effectiveness typically monitor changes in symptoms over a period of a few weeks.

Q: Is it possible for Grandaxin to cause vivid dreams or insomnia?

The official adverse effects profile includes insomnia (sleeplessness) as a possible documented reaction. Other related symptoms of the nervous system that have been reported include agitation and restlessness.

Q: What happens if Grandaxin is stopped suddenly?

Official information indicates that this drug is characterized by a lower risk of dependence and withdrawal symptoms when compared to traditional benzodiazepines. Studies have described patterns where withdrawal effects following discontinuation were similar to those experienced by participants taking a placebo.

Q: What should I know about taking Grandaxin if I have liver problems?

Severe liver impairment is formally listed as a contraindication, meaning the medicine is prohibited in this condition. For patients with non-severe liver issues, official product information indicates that caution is required, which may include close observation.

Q: Can Grandaxin be used for generalized anxiety?

Regulatory documents indicate the medication is used for the management of anxiety disorders and related symptoms of emotional tension. Some official summaries specifically list the management of Generalized Anxiety Disorder (GAD) as an indication.

Q: Are there reported long-term side effects of Grandaxin?

The research evidence base indicates that data for long-term outcomes, such as those occurring over a year or more, are limited. While the drug has been used for extended treatment with generally favorable safety profiles, detailed long-term side effects are not fully established in all research.

Q: Is Grandaxin considered addictive or habit-forming?

Official information characterizes this drug as having a lower risk of dependence compared to conventional anxiety medicines. Some regulatory sources indicate that no habit-forming tendencies have been reported, and long-term use is not associated with physical or mental dependence.

Q: Does Grandaxin interact with birth control pills?

Yes, official drug interaction summaries document that oral contraceptives (birth control pills) may potentially affect Grandaxin's metabolism. This change could lead to an increase in the drug's concentration in the plasma.

Q: Does taking Grandaxin require regular blood tests?

Official product information does not generally mandate routine blood tests for all patients. However, if a patient has pre-existing conditions like liver disease or is an older adult, close monitoring through liver function testing may be considered.

Q: Are there any warnings about Grandaxin and operating heavy machinery?

Official warnings advise caution regarding activities that require high mental alertness, such as operating machinery or driving a vehicle. This warning is in place particularly if the patient experiences adverse effects like dizziness or drowsiness during treatment.

Q: Can Grandaxin be taken at night or only in the morning?

The administration guidelines indicate that the medication is typically administered in divided doses up to three times a day. This schedule suggests that the drug is intended to be taken throughout the day, which can include the morning, noon, and evening.

Q: Is it common to feel stomach upset when starting Grandaxin?

Adverse effects are most commonly reported in the Gastrointestinal System. Commonly reported reactions in official summaries include nausea, vomiting, constipation, and dry mouth.

Q: Is Grandaxin available over the counter in some countries?

The general legal status for Grandaxin (Tofisopam) across most regulatory bodies is categorized as a prescription-only medicine.

Q: Why is Grandaxin sometimes prescribed for psychosomatic disorders?

The official uses are related to the relief of anxiety and emotional tension. The drug is also noted to help manage associated symptoms of autonomic dysfunction, such as physical symptoms that can be associated with psychosomatic disorders.

Q: Does Grandaxin have an effect on mood or only on anxiety symptoms?

The primary official purpose is the relief of symptoms related to anxiety and emotional tension. Clinical studies have monitored how the medication affects total psychomotor effects, which can include measuring changes in symptoms of depressed mood alongside anxiety.

How should Grandaxin be stored and disposed of?

How to Store and Dispose of Grandaxin?

Storage Requirements

Grandaxin (tofisopam) must be stored strictly according to its official labeling to maintain product stability and integrity. The tablets require storage at a controlled temperature not exceeding 30 C.

The medication must be actively protected from both moisture and direct light. For the safety of the household, the medicine must be stored in a secure, inaccessible location and kept out of the sight and reach of children at all times.

Disposal Instructions

Disposal of expired or unused Grandaxin should follow official regulatory guidance. Do not dispose of the tablets by flushing them down a toilet or pouring them down a sink, as this can contaminate public water systems.

Patients should utilize local drug take-back programs, if available. Alternatively, the unused medicine should be mixed with an unappealing substance, sealed in a bag, and disposed of in the household trash, in accordance with local environmental regulations.

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

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