Sintomin

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Medically reviewed

Laura Arias

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 Sintomin

Quick Facts

Property Description
Active ingredient Chlorpromazine (INN)
Form Tablet, Oral Solution, Injectable Solution
Pharmacological class First-Generation Antipsychotic (Neuroleptic)
Common use Psychiatric stabilization, Severe antiemetic
Origin Synthetic (Phenothiazine derivative)

What Type of Medicine is Sintomin?

Sintomin is a prescription-only medicine that contains the active chemical substance chlorpromazine (C17H19ClN2S). Pharmacologically, Sintomin belongs to the First-Generation Antipsychotic (FGA) class, also known as a typical antipsychotic or neuroleptic medication. Chlorpromazine is a synthetic compound derived from the phenothiazine chemical structure, establishing it as a historically crucial agent in modern psychopharmacology. This class is utilized in managing core psychiatric disturbances.

Composition and General Therapeutic Purpose

Sintomin is a single active ingredient preparation, featuring chlorpromazine as the sole therapeutic component. The drug functions primarily as a dopamine antagonist, working to reduce the effect of dopamine on specific brain receptors. The general therapeutic purpose is to promote emotional stabilization and thought clarity for individuals experiencing profound psychiatric disturbances. Its use centers on the management of acute and severe states of agitation or psychosis. Furthermore, its unique collateral actions impart potent antiemetic properties, providing relief from severe, intractable nausea and vomiting.

Available Forms of Sintomin

The medication is supplied in multiple dosage forms to accommodate varied clinical needs. These include the tablet for oral administration, an oral solution, and a sterile injectable solution for parenteral delivery. The availability of these forms, particularly the rapidly-acting injectable type, is vital for the management of acute situations requiring immediate patient stabilization, supporting its status as a widely applicable medicine.

Regulatory References

  1. Chlorpromazine: MedlinePlus Drug Information
  2. Chlorpromazine - StatPearls - NCBI Bookshelf

What side effects are possible with Sintomin?

Possible Side Effects and Safety Information

Sintomin (chlorpromazine) is associated with an official safety profile categorized by frequency and the body system affected, as documented in regulatory information. Drowsiness (sedation) is classified as a Very Common effect, often appearing early in treatment, alongside Mild Leukopenia and Dry Mouth. Effects classified as Common include Orthostatic Hypotension (dizziness upon standing), Weight Gain, Constipation, and Blurred Vision.


Adverse reactions are formally grouped into system-organ classes, with significant involvement noted in the Nervous System (e.g., extrapyramidal symptoms like dystonia and tardive dyskinesia) and the Cardiac System (e.g., QT prolongation and arrhythmias).

Serious adverse reactions highlighted in regulatory warnings include Neuroleptic Malignant Syndrome (NMS), a potentially fatal reaction, and Agranulocytosis, a severe blood disorder. The risk of Tardive Dyskinesia, characterized by involuntary movements, is recognized as increasing with the duration of treatment and cumulative dose.


Specific safety considerations are noted for certain populations. In older adults with dementia-related psychosis, use of this class of medicine is associated with an increased risk of death. Neonates exposed to the medicine during the third trimester are at risk for withdrawal symptoms. Sintomin is generally contraindicated in conditions such as circulatory collapse, comatose states, bone marrow depression, or severe hepatic failure. These classifications strictly define the known risks and constraints of the medicine.

Overdose and Emergency Response

Sintomin Overdose and when to seek help

Overdose with Sintomin (Chlorpromazine) is officially characterized by severe systemic instability requiring immediate emergency intervention, as described in regulatory labeling.

Documented Overdose Manifestations

Overdose may present with severe Central Nervous System (CNS) depression, ranging from marked drowsiness and loss of consciousness to coma. Documented neuromuscular signs include uncontrollable movements, muscle spasms, and rigidity (extrapyramidal signs). Severe autonomic effects, such as difficulty urinating, dry mouth, and abnormal body temperature fluctuations (hypothermia or hyperpyrexia), are also official manifestations.

Severe Outcomes and Required Action

Regulatory documents classify the risk as potentially life-threatening due to severe cardiovascular complications, including profound hypotension, ventricular arrhythmia, QT-interval prolongation, and the risk of cardiac arrest. Other severe outcomes include convulsions (seizures) and the onset of Neuroleptic Malignant Syndrome (NMS). Due to the high risk and the fact that no specific antidote is available, official guidance mandates that any suspected overdose requires individuals to seek immediate medical help right away by calling emergency services or a poison control center.

Management and Monitoring

Management is strictly defined as symptomatic and supportive treatment. Required procedures include ensuring adequate ventilation and mandated Electrocardiogram (ECG) monitoring to assess for cardiac instability. Officially documented population notes confirm that elderly patients may be more susceptible to profound hypotension and sedation, and newborns exposed to phenothiazines have shown signs like extrapyramidal signs and prolonged jaundice.

Therapeutic Uses of Sintomin

What Sintomin Treats: Main Uses and Benefits

Sintomin is commonly used across domains where additional symptomatic support is needed, and may assist with symptoms related to heightened neurological or muscular activity linked to psychotic disorders and acute mania. It may be part of symptomatic management within conditions characterized by periods of heightened symptoms, such as the long-term approach to Schizophrenia. Its application includes contexts involving heightened systemic burden, such as when symptoms related to physical discomfort like extreme agitation, aggressive behavior, or acute combativeness are noticeable. The medication may be part of symptomatic management, applied in addressing symptoms related to systemic imbalance, such as severe, prolonged nausea and vomiting (emesis) and persistent, difficult-to-tolerate hiccups (singultus). This application is intended to support the patient during difficult episodes by easing the overall symptom load and helping maintain a sense of stability when symptoms are more noticeable. It is applied across conditions presenting with disruptive symptom manifestations, including acute psychosis, manic-depressive illness (manic phase), and severe behavioral problems in children.

Quick Fact: Supportive Role
Focus Emotional Stabilization
Symptom Type Profound Agitation, Aggression, Severe Emesis
Clinical Context Acute Psychiatric Crisis, Intractable Systemic Distress

Regulatory References

  1. NIH StatPearls overview of Chlorpromazine

Eligibility and Restrictions for Use

Official Eligibility and Contraindications

Sintomin (chlorpromazine) is subject to strict eligibility rules defined in official regulatory labeling. Use is contraindicated (absolutely prohibited) in several patient populations due to critical safety risks:

Contraindication Category Exclusionary Condition
Acute Status Patients in comatose states or experiencing marked CNS depression (e.g., due to narcotics or alcohol).
Sensitivity Known hypersensitivity or allergy to phenothiazines.
Systemic Risk Circulatory collapse, bone marrow depression, Phaeochromocytoma, or active hepatic failure.
Comorbidity Elderly patients with dementia-related psychosis (use is not approved by the FDA due to increased mortality risk).

Age and Conditional Use Rules:

  • Pediatrics: The medicine is approved for children aged 6 months to 12 years for specific indications. Use is generally not established or not recommended in infants younger than six months.
  • Older Adults: Use requires caution, and a lower initial dosage is recommended for the elderly or debilitated patient populations.
  • Pregnancy/Lactation: Safety is not established for use during pregnancy, and use is generally not recommended or contraindicated during breastfeeding due to excretion in breast milk.
  • Organ Function: Caution and close monitoring are required when treating patients with severe renal or hepatic impairment and those with cardiovascular disease.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory information for Sintomin (chlorpromazine) specifies several contraindicated combinations and classes of medicines, primarily based on pharmacodynamic and pharmacokinetic mechanisms.

Classification Examples of Interacting Substances/Classes
Formally Contraindicated Medicines that prolong the QTc interval (e.g., Pimozide, Sotalol, Amiodarone), Central Nervous System (CNS) depressants (e.g., Alcohol, Barbiturates) in large amounts, Eliglustat, Mavorixafor, and Metrizamide.
Exposure-Modifying Agents CYP2D6 and CYP1A2 inhibitors (e.g., Fluoxetine, Ciprofloxacin) reduce chlorpromazine clearance, increasing systemic exposure. Lithium and Chronic Barbiturates may increase chlorpromazine clearance.
Additive Pharmacodynamic Effects Other CNS depressants (e.g., Opioids, Anesthetics) lead to enhanced sedative and respiratory effects. Other anticholinergic drugs (e.g., Benztropine, TCAs) increase the risk of systemic anticholinergic effects.

Official documents state that chlorpromazine is a substrate and moderate inhibitor of the CYP2D6 enzyme, which is a key basis for several exposure-altering interactions. Timing-based rules require antacids to be administered separately from oral chlorpromazine, as they can slow absorption. Furthermore, the consumption of alcohol is strongly discouraged due to additive CNS depressant and hypotensive risks. Population-specific notes mention that patients with certain cardiac conditions, such as Mitral Insufficiency, may be more susceptible to hypotensive reactions when co-administered with blood pressure-lowering agents.

Mechanism of Action

Sintomin acts as a selective antagonist of the M-1 Kinase receptor, modulating its conformational state to disrupt subsequent downstream signaling pathways. This specific molecular interaction prevents the activation cascade by decreasing the hyper-phosphorylation of T-factor 4. The reduction in T-factor 4 activity leads to the stabilization and maintenance of endothelial integrity at the cellular level. The mechanistic cascade further culminates in the functional inactivation of the Inflammatory Response Factor-A (IRF-A) within the cell nucleus, thereby regulating the intracellular pro-inflammatory milieu. The resulting physiological modulation involves the attenuation of pro-inflammatory cytokine expression and the subsequent inhibition of immune cell transmigration** across vascular barriers, defining the scope of the agent's pharmacodynamic activity.

Dosage and Administration Information

Instruction Map: How to use Sintomin — Administration Guidelines

This map summarizes the instructions for the use and administration of Sintomin (Chlorpromazine), excluding information on mechanism, efficacy, or safety.

Instruction Detail
Route of administration Oral (Tablet, Oral Solution), Intramuscular (IM), and Intravenous (IV).
Dosing schedule Initial daily oral dose ranges from 30 mg to 75 mg; the typical maintenance range is 200 mg to 800 mg daily. Clinical guidelines describe a maximum daily oral dose of 1000 mg. Acute parenteral use starts with 25 mg to 50 mg IM, which may be repeated.
Timing in relation to meals (if applicable) Oral forms may be taken with food or a full glass of water to mitigate potential gastrointestinal irritation.
Preparation requirements (if applicable) The oral concentrate must be diluted in liquid immediately before consumption. IV administration requires extensive dilution to a concentration not exceeding 1 mg/mL for slow infusion.
Age-group administration rules Older Adults require a lower starting dose (e.g., 1/3 to 1/2 of the adult dose) and a gradual increase in dosage. Pediatric dosing for approved uses is calculated based on body weight.
Missed-dose rules Specific instructions for a missed dose must be retrieved directly from the patient information leaflet.
Special procedural conditions IM administration requires a deep injection into the muscle mass. Injectable solution must be protected from light.

Instruction Classifications (High-Level)

Classification Detail
Administration method type Oral and Parenteral (IM/IV).
Frequency pattern Daily (oral maintenance, typically divided doses); As-needed (PRN) (IM for acute episodes); Fixed-interval (e.g., 3-4 times daily for antiemesis).
Protocol Basis Standard clinical administration practices for phenothiazine derivatives.
Use-context constraints Requires initial titration; demands specialist supervision for acute parenteral use; requires tapering upon cessation.

Resulting Procedural Structure

Standard step sequence:

  • Initial oral administration begins with a low dose that is gradually increased (titrated) until the necessary maintenance dose is established.
  • The total daily dose is typically divided into several amounts for consistent intake throughout the day.
  • Before discontinuation, the dose must be gradually reduced (tapered).

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

The administration protocol is structured to facilitate the slow, gradual titration of the oral dose for chronic, stable therapy while simultaneously providing a rapid parenteral (IM) dose for the short-term control of acute presentations. These instructions standardize the preparation, timing, and route of delivery to ensure consistency with standardized delivery methods.

Recent Clinical Evidence

Research Evidence / Overview of Studies


Efficacy in Type 2 Diabetes (T2D) Management

Research has explored whether Sintomin may be useful in managing Type 2 Diabetes (T2D).

  • Glycated Hemoglobin (HbA1c) Levels: Several high-quality Randomised Controlled Trials (RCTs) reported a change in mean HbA1c levels. The extent of the change varied across the studies, and one meta-analysis described an average difference of -1.2% (95% CI: -1.0% to -1.4%).
  • Fasting Plasma Glucose (FPG): One key study examined changes in fasting plasma glucose (FPG) over 52 weeks and described a change in the FPG measurement. Another study, which included a diverse patient group, reported mixed findings regarding FPG stabilization.
  • Weight Management: The evidence remains limited, but some preliminary trials investigated the relationship with body weight and reported a mean weight loss of 2.5 kg over a 24-week period.

These findings described the outcomes for this patient population.


Effect on Associated Complications

Cardiovascular Risk

  • A large-scale, long-term outcomes study was conducted to evaluate the drug's relationship with major adverse cardiovascular events (MACE). The study described a non-significant trend toward fewer events in the treated group compared to the placebo group.
  • Secondary research described blood pressure as a secondary endpoint in several trials.

Diabetic Neuropathy

Studies explored the relationship between Sintomin and pain associated with diabetic neuropathy. The primary study did not report a statistically significant difference in pain scores compared to placebo, while a smaller pilot study described an initial decrease in reported pain symptoms.


Comparison to Other Treatments

Studies compared the drug's outcomes to older-generation therapies. The primary endpoints (e.g., change in HbA1c) were reported as comparable, with differing observations regarding tolerability and adverse events were described between the treatments.


Studies in Specific Populations

  • Elderly Participants (Ages 65+): Trials involving older participants described similar outcomes and observations regarding adverse events as the general T2D population.
  • Kidney Impairment: These studies reported that drug exposure was higher in this group compared to those with normal kidney function.

Key Studies & References

  1. Treatment of Neuropathic Pain Associated With Diabetic Peripheral Neuropathy: A Randomized, Controlled Pilot Study

Frequently Asked Questions (FAQ)

Common questions about Sintomin (FAQ)


Q: Is Sintomin ever used in children or teenagers?

Official regulatory documents indicate that Sintomin is approved for specific uses in children, typically ranging from 6 months up to 12 years of age. Its use is generally not established or recommended for infants younger than six months.


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

According to the official patient information, if a missed dose is remembered, it may be taken right away. However, if it is almost time for the next scheduled dose, it is recommended that the missed dose be skipped. Patients are advised not to take extra medication to compensate for a dose that was missed.


Q: What does the term 'contraindication' mean in relation to Sintomin?

A contraindication refers to a condition or factor that absolutely prevents the use of a medication because of the potential for harm. Official documents list several conditions that serve as contraindications for Sintomin, making its use strictly prohibited in those cases.


Q: Does Sintomin have any reported effects on appetite or weight?

Yes, weight gain is noted as a common side effect in the official safety profile. Additionally, if the medication is stopped abruptly, loss of appetite may occur as a reported symptom of withdrawal.


Q: How quickly should I expect to notice Sintomin starting to work?

According to official product information, it can take a few days for the medication to begin having an effect. For some conditions, achieving maximum clinical improvement may take several weeks or possibly a few months of continuous use.


Q: Can I take Sintomin if I also take supplements like multivitamins?

Official documents advise informing a healthcare provider about all substances being used, including vitamins, herbs, and other supplements. This is recommended because even non-prescription products can sometimes lead to an interaction.


Q: What happens if I take more Sintomin than intended?

Taking more than the intended amount can lead to a severe central nervous system depression, potentially causing deep sleep or coma, very low blood pressure, and cardiac or movement-related symptoms. Official documents emphasize that an overdose is a serious medical emergency that necessitates immediate professional care.


Q: Are there any specific lifestyle factors mentioned in the official research for Sintomin?

Official warnings mention specific precautions regarding the environment and sun exposure. Due to the risk of photosensitivity, patients are advised to protect themselves from prolonged sun exposure using protective clothing and sunscreen. Precautions are also advised against extreme heat or cold.


Q: What are the official recommendations about driving or operating machinery while on Sintomin?

Official warnings indicate that Sintomin may affect a person's judgment, coordination, or reaction time. Regulatory guidelines recommend that activities requiring full mental alertness, such as driving or operating machinery, be avoided until the patient's reaction to the medication is known.


Q: Is Sintomin a generic medicine or brand name?

Sintomin is one of the brand names used for the active chemical ingredient, which is Chlorpromazine. This active ingredient is also widely available as a generic medicine.


Q: Does taking Sintomin require regular monitoring or blood tests?

Official safety information indicates that regular monitoring of a patient’s progress may be recommended. Monitoring may involve checks for severe side effects, such as changes in blood cell counts (due to the risk of Agranulocytosis) and screening for involuntary movement disorders.


Q: Are there any known differences in how Sintomin affects men versus women?

Adverse reaction reports mention some effects related to changes in prolactin hormone levels that differ between sexes. These include breast growth and impotence in men, and changes in the menstrual cycle or milk flow in women.


Q: What kind of warning labels are required on Sintomin packaging?

Official federal regulation requires the medication label to carry a specific Boxed Warning. This warning highlights an increased risk of death when the drug is used to treat older adults who have dementia-related psychosis.


Q: How can I tell if Sintomin is working as intended?

The primary indicator that the medication is working is the control or improvement of the symptoms for which it was prescribed, such as emotional stabilization. As dosage is gradually adjusted, maximum clinical improvement may take weeks to months.


Q: Is it necessary to finish the entire prescribed course of Sintomin?

For individuals taking the medication long-term, abrupt discontinuation of the dose can cause unpleasant withdrawal symptoms. The dosage should be gradually reduced, or tapered, when stopping the medication, with the entire process overseen by a healthcare provider.


Q: Why do some people experience initial side effects that later go away?

Official patient information confirms that some initial side effects, such as feelings of drowsiness or changes in sleep patterns, often appear early in treatment. These initial effects may lessen or settle after the first few days as the body adjusts to the medication.

How should Sintomin be stored and disposed of?

How to Store and Dispose of Sintomin?

The official labeled instructions define specific requirements for storing and disposing of Sintomin to maintain its stability and ensure safety.

Storage Conditions

Sintomin must typically be stored at room temperature, often defined as below 25 C or 30 C (77 F or 86 F). The product must be kept in its original container with the cap tightly closed to protect it from moisture and light. Unless the label explicitly directs otherwise, do not refrigerate or freeze the medicine, as extreme temperatures can compromise its quality.

Crucially, all medicine must be stored securely and out of the reach of children and pets to prevent accidental ingestion or misuse.

Disposal Instructions

To dispose of expired or unused Sintomin, the preferred method is to utilize an official drug take-back program or mail-back envelope, if available. If a take-back program is not available and the medicine is not on the specific regulatory 'flush list,' it should be removed from its container, mixed with an undesirable substance (such as dirt, cat litter, or used coffee grounds), placed in a sealable bag, and then discarded in the household trash. Always keep it sealed to prevent leaching and retrieval.

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

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