Serenase

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Medically reviewed

Rosario Oropesa

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 Serenase

The section below provides a foundational definition of the medicine Serenase (Active Ingredient: Haloperidol), detailing its identity, composition, and general purpose as an antipsychotic agent.

Property Description
Active ingredient Haloperidol (base or ester)
Form Tablet, Oral Liquid, Injectable Solution
Pharmacological class First-Generation Antipsychotic (FGA)
General purpose Chemical stabilization of brain activity
Origin Synthetic (Butyrophenone derivative)

Serenase: What Type of Medicine Is Haloperidol?

Serenase is a medicinal preparation whose active compound is Haloperidol, classifying it as a First-Generation Antipsychotic (FGA) agent, a group also referred to as typical antipsychotics. This compound is a fully synthetic substance derived from the butyrophenone chemical family. The drug's classification and potent action have been supported by numerous pharmacological studies, affirming its role in managing acute psychiatric states.

As a high-potency FGA, Haloperidol's mechanism centers on acting as a strong regulator of the brain’s dopamine system, particularly by modulating the activity of the central D2 receptors. Serenase is a recognized brand name containing Haloperidol, typically used in adult patient populations, and is categorized as a prescription-only medicine (Rx status). The product is a single-agent product, with its therapeutic effects stemming solely from the Haloperidol compound or its known esters.

Composition, Forms, and General Therapeutic Purpose

The core composition of Serenase consists of the active substance, Haloperidol, formulated as either the base compound or its esters, such as Haloperidol Lactate or Haloperidol Decanoate. These are combined with appropriate inactive ingredients to create various pharmaceutical preparations for flexible delivery. The available forms include tablets and oral liquid for convenient daily intake, as well as solutions intended for intramuscular injection. The Decanoate form, a specialized long-acting preparation, uses an oily vehicle to allow for the sustained release of the compound.

The general therapeutic purpose of the medication is to restore chemical stabilization and order in the brain's signaling processes. By moderating the dopamine signals, the medicine serves the overall function of dampening overactive nerve activity, which provides foundational relief from intense internal agitation and severe functional disturbances.

Regulatory References

  1. Haloperidol Label (DailyMed)

What side effects are possible with Serenase?

Possible Side Effects and Safety Information

The safety profile of Serenase (Haloperidol) is defined by officially documented adverse reactions and specific regulatory constraints, which classify potential effects by frequency and the body system affected. These classifications reflect how government regulatory documents organize and communicate the medicine’s risk profile.

Adverse Reaction Categories and Frequency

Adverse reactions are grouped by frequency based on regulatory classifications:

  • Very Common: The most frequently reported effects include Extrapyramidal Disorder, which covers movement symptoms such as akathisia, dystonia, and parkinsonism, and Headache.
  • Common: Effects such as somnolence (drowsiness), agitation, constipation, and dry mouth are commonly reported.
  • Uncommon / Rare: Less frequent effects involve leukopenia, oculogyric crisis, tachycardia, and hepatic dysfunction. Rare adverse reactions include QTc interval prolongation and priapism.

Serious Safety Constraints

The regulatory profile identifies several serious adverse reactions and population-specific restrictions:

  • Serious Risks: The profile documents the potential for rare but life-threatening events, including Neuroleptic Malignant Syndrome (NMS) and severe ventricular arrhythmias (such as Torsades de Pointes), which can lead to sudden death. Tardive Dyskinesia (TD), a movement disorder, is associated with long-term exposure and cumulative dose.
  • Population-Specific Notes: Official labeling notes an increased risk of mortality and cerebrovascular events in elderly patients with dementia-related psychosis. The medicine is contraindicated in patients with Parkinson's Disease or known pre-existing conditions that prolong the QTc interval. The antiemetic effect of Haloperidol may also mask signs of toxicity from other medicines or certain illnesses.

This structure establishes that motor disturbances are recognized effects of the medicine, while serious systemic risks define the absolute constraints and contraindications for use.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose manifestations of Serenase (Haloperidol) are generally recognized as an exaggeration of the medicine’s known effects, centering on the central nervous system, neuromuscular system, and the heart.

Overdose Domain Official Regulatory Statements
Documented Manifestations Severe CNS depression leading to comatose states and profound drowsiness. Exaggerated extrapyramidal symptoms (EPS), including severe rigidity and oculogyric crisis. Hypotension and tachycardia are also documented signs.
Life-Threatening Outcomes Overdose is associated with QTc prolongation and the risk of Torsades de Pointes (TdP) and sudden death; the risk increases with doses higher than recommended. The Neuroleptic Malignant Syndrome (NMS), characterized by hyperpyrexia and muscle rigidity, is a potentially fatal complication.
Emergency Actions Users must call emergency services immediately in case of suspected overdose. Management is strictly symptomatic and supportive, as no specific antidote is known. If NMS is suspected, the medicine must be immediately discontinued.
Required Monitoring ECG monitoring is required to assess for QTc prolongation and ventricular arrhythmias. If severe hypotension occurs, specific vasopressor agents must be used, and Epinephrine is contraindicated.

The regulatory documents define the Haloperidol overdose profile based on the severity of documented CNS, cardiac, and neuromuscular manifestations. This profile explicitly mandates that medical help must be sought immediately due to the risk of life-threatening syndromes like NMS and TdP. The management strategy is consistently described as symptomatic and supportive, requiring specific, regulator-defined procedural steps.

Therapeutic Uses of Serenase

What Serenase Treats: Main Uses and Benefits

Serenase is used in situations involving certain distressing symptoms across several therapeutic domains.


Symptomatic Relief and Stabilization

Serenase is commonly used across conditions characterized by periods of heightened symptoms and is considered relevant for supporting general well-being when symptoms are more noticeable. The medicine is applied to provide symptomatic support during sudden, acute episodes of mental distress, such as acute psychosis and mania, and may assist with managing heightened symptoms of agitation, hostility, and aggression. This generally contributes to improved comfort during symptomatic periods.

It is also applied in addressing core positive symptoms of chronic psychosis, including persistent hallucinations and delusions, for long-term support. Furthermore, it is relevant for symptomatic control over severe, disruptive motor and vocal tics associated with Tourette's Syndrome. In non-psychiatric contexts, this medicine plays a role in managing pronounced nausea and vomiting when additional symptomatic support is needed.


“This medicine supports the patient during difficult episodes by easing distress and assists with maintaining functional stability.”


Quick Fact: Relief for Severe Behavioral Symptoms

Quick Fact: Relief for Severe Behavioral Symptoms

This medication is applied in clinical settings that involve acute or unstable symptom patterns, offering short-term symptomatic assistance to help manage aggressive behaviors, high internal tension, and overwhelming mental distress. This may assist with maintaining functional stability during symptomatic phases.

Eligibility and Restrictions for Use

Who Can and Cannot Use Serenase?

This section details the official population eligibility and non-eligibility rules for Serenase (Haloperidol), based strictly on regulatory documents.

Absolute Non-Eligibility (Contraindications)

Serenase must not be used in patients with absolute exclusions. These include pre-existing Parkinson’s disease, Dementia with Lewy Bodies, or those experiencing severe toxic central nervous system depression or comatose states. Use is also strictly prohibited for individuals with specific severe cardiovascular conditions, such as known QTc interval prolongation, recent acute myocardial infarction, or uncompensated heart failure.

Age and Physiological Restrictions

Use is established for adults (18 years and above). For children and adolescents, use is restricted to specific, severe psychiatric indications and only above defined minimum age thresholds (e.g., 6, 10, or 13 years). Use is not approved for older adults with dementia-related psychosis. Patients with hepatic impairment require a restricted starting dose. Use during pregnancy is limited to cases where the benefit justifies the documented risk, and use during lactation is restricted.

What should I know about interactions with other medicines?

Serenase (haloperidol) interacts with several medicine classes and specific products, which may alter its effects or increase the risk of serious side effects.

Key Pharmacokinetic and Pharmacodynamic Interactions:

  • Drugs that Prolong the QTc Interval: Concomitant use with other medicinal products known to prolong the QTc interval is contraindicated due to the increased risk of ventricular arrhythmias, including Torsades de Pointes. This includes certain antiarrhythmics, antibiotics, and other antipsychotics.
  • CYP3A4 and/or CYP2D6 Inhibitors: Haloperidol is metabolized by these enzymes. Combining it with strong inhibitors (e.g., fluoxetine, paroxetine, quinidine, ketoconazole) may increase haloperidol plasma levels, potentially increasing the risk of QTc prolongation and other adverse reactions.
  • CYP3A4 Inducers: Concomitant use with strong enzyme inducers (e.g., carbamazepine, rifampicin, phenobarbital) may significantly decrease haloperidol plasma levels, potentially reducing its effectiveness. Dose adjustments or monitoring may be required.

Other Clinically Significant Interactions:

  • CNS Depressants: The effects of alcohol and other central nervous system (CNS) depressants, such as sedatives or opioid analgesics, may be potentiated, leading to increased sedation and respiratory depression.
  • Lithium: The combination with lithium requires close monitoring, as an encephalopathic syndrome characterized by neurological toxicity has been reported.
  • Levodopa: Haloperidol can impair the effects of levodopa and other dopamine agonists by acting as a dopamine antagonist.
  • Adrenaline (Epinephrine): Haloperidol may block the vasopressor activity of adrenaline, which may result in paradoxical hypotension.

Mechanism of Action

Dopamine D2 Receptor Antagonism

The drug, which contains haloperidol, acts primarily as a selective antagonist at the Dopamine D2 receptors in the brain. By occupying and blocking these receptors, the compound prevents the neurotransmitter dopamine from binding, which modifies the level of dopaminergic signaling. This action is most prominent in circuits associated with information processing, such as the mesolimbic pathway.


Modulating Dopaminergic Brain Pathways

The D2 antagonism extends across the four major dopaminergic pathways that regulate various functions. The primary mechanistic consequence is linked to modulation within the mesolimbic pathway, while its effect on the nigrostriatal pathway influences motor control circuitry. By moderating dopaminergic activity across these functional pathways, the drug induces a change in the overall excitation/inhibition state of the central nervous system.


Ancillary Effects on Alpha-1 and Cholinergic Receptors

The complete mechanistic profile includes lower-affinity engagement with additional receptors, such as alpha-1 adrenergic (alpha1) and muscarinic cholinergic receptors. This ancillary activity represents a broader interaction with the monoamine and cholinergic systems. These secondary actions modify molecular steps, thereby contributing to physiological changes in hemodynamic parameters and autonomic nervous system signaling.

Dosage and Administration Information

The administration of Serenase (Haloperidol) is determined by its official formulation, which includes oral forms (tablets and liquid) and intramuscular (IM) injectable solutions. The oral formulation is typically administered in 2 to 3 divided doses per day, with standard adult dosing beginning in the 0.5 to 5 mg range per dose. The maximum daily oral dose generally does not exceed 100 mg.

Two distinct IM preparations exist: Haloperidol Lactate and Haloperidol Decanoate. The Lactate injection is used for acute situations, administered in 2 to 5 mg doses, repeatable every 4 to 8 hours, up to a maximum of 20 mg/day. The Decanoate form is a long-acting depot injection used for maintenance, administered once every 4 weeks. The initial Decanoate dose is calculated based on 10 to 15 times the preceding daily oral dose.

Procedural rules mandate that patients must be stabilized on the oral form before converting to the long-acting Decanoate injection. For the oral concentrate, official guidance requires the use of a calibrated dropper for accurate measurement, and the dose should be mixed with a beverage immediately before intake. The Decanoate injection must be given by a healthcare professional via deep IM injection into the gluteal region, and must not be administered intravenously.

Special procedural rules apply to vulnerable populations; for example, treatment in older adults must be initiated with a lower starting dose, often half the lowest adult dose, and titrated carefully. When discontinuation is warranted, the treatment should be gradually tapered.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Serenase

Serenase (Haloperidol) was studied for its use in several conditions, primarily focusing on conditions characterized by fluctuating or episodic manifestations and acute symptomatic states. The evidence base for this medicine consists mainly of short-term Randomized Controlled Trials (RCTs), longer Systematic Reviews, and Observational Studies that monitor patient patterns over time.


Evidence for Use in Chronic Psychotic Illnesses and Acute Agitation

Research efforts have concentrated on measuring outcomes related to episodic or acute changes in the adult population. Studies primarily used short-term RCTs, where participants were observed during periods of increased symptom activity. The studies monitored outcomes comparing the group receiving Serenase against the control groups (placebo or comparator).

Findings describe patterns observed in the studies regarding overall global clinical state outcomes during the first few weeks of treatment. For symptoms such as hallucinations and delusions, research examined how quickly the measured symptom scores changed. However, the evidence quality varies across studies, and a high rate of loss to follow-up may contribute to inconsistent findings and suggests the findings for short-term outcomes may be less certain.


Evidence for Tics Associated with Tourette's Syndrome

The research exploring this indication includes Controlled Studies and Comparative Trials that monitored outcomes related to symptoms reflecting daily functioning or activity level. This evidence focused on populations that included both children and adolescents with the syndrome, along with some studies featuring mixed age groups.

Research highlights measured outcomes related to tic severity when comparing the group receiving Serenase to a placebo group. Data for certain groups remain insufficient. Specifically, the inclusion of mixed age populations in some trials means the findings provide limited insight into the distinct needs of children versus adults.


Evidence for Nausea and Vomiting

This part presents the high-quality evidence, primarily from Meta-analyses and RCTs, that examined the outcomes associated with Serenase in the prevention and treatment of severe nausea, particularly in postoperative settings. Research describes patterns observed in these measured outcomes when comparing the group receiving Serenase to placebo in the context of prophylaxis (prevention). Data for certain groups remain insufficient, notably for the use of this medicine in the pediatric population for this indication.

Frequently Asked Questions (FAQ)

Common questions about Serenase (FAQ)


Q: Is Serenase the same thing as other medications used for similar conditions?

Serenase (haloperidol) is classified as a first-generation antipsychotic (FGA), specifically belonging to the butyrophenone chemical group. Regulatory documents state that its primary action is a potent blocking of the dopamine D2 receptors in the brain. This specific mechanism and chemical profile distinguishes it from other classes of medicine that may be used for similar conditions.


Q: Does Serenase have a black box warning?

Yes, official U.S. regulatory labeling includes a Boxed Warning concerning the use of the medication in older adults. This warning highlights an increased risk of death when the drug is used to treat patients with dementia-related psychosis. The drug is not approved for the treatment of this specific condition.


Q: How quickly does Serenase start working after taking it?

The time it takes to see the full therapeutic effects can vary. While the injectable form used for acute agitation may be repeated every 4 to 8 hours, it may take several days or even a few weeks of consistent use to reach the intended effect. The schedule for administration is determined by your prescribing healthcare professional based on individual needs and the formulation used.


Q: Can Serenase cause weight gain?

Weight gain is listed in official product information as a commonly reported metabolic adverse reaction in patients taking haloperidol. This information is noted alongside other metabolic and endocrine changes in the drug’s safety profile.


Q: What happens when you stop taking Serenase?

The official guidance advises that treatment should not be stopped suddenly. If the decision is made to discontinue use, the dose should be gradually decreased or tapered over time. Stopping abruptly may lead to the return of symptoms or potential withdrawal effects.


Q: Does Serenase impact hormone levels in the body?

Yes, regulatory documents note that the medicine can be associated with changes in hormone levels, most commonly hyperprolactinemia (high levels of the hormone prolactin in the blood). Other rare hormonal changes are also described in the adverse reactions section of the labeling.


Q: Can I take Serenase if I have liver problems?

Use is generally permitted for patients with liver problems, but specialized management is required. Official prescribing information indicates that for patients with hepatic impairment, consideration should be given to starting treatment at the low end of the recommended dosing range. The decision regarding use is made by the prescribing healthcare professional.


Q: Does Serenase have an effect on sleep patterns?

Official labeling lists somnolence (drowsiness) as a common nervous system adverse reaction. Official information indicates that even when taken at night, drowsiness or less alertness upon waking has been reported as a common nervous system effect.


Q: Is Serenase safe to use for a long period of time?

Official warnings note that the risk of developing Tardive Dyskinesia (TD), a potentially irreversible involuntary movement syndrome, is associated with long-term exposure. Regulatory labeling indicates that the risk of this condition is considered to be associated with longer treatment duration and total cumulative dose.


Q: Is there a generic version of Serenase available?

Yes. The active ingredient in Serenase is haloperidol, which is widely available as a generic drug. Generic versions are listed in government drug databases under the Abbreviated New Drug Application (ANDA) marketing status.


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

If a dose of the oral form is missed, official guidance suggests taking it as soon as it is remembered. However, regulatory sources advise that if it is almost time for the next scheduled dose, the missed dose is typically skipped, and the regular schedule is resumed. Double doses should not be taken to make up for a missed one.


Q: Can taking Serenase affect my ability to drive?

Yes. Due to the potential for effects on the nervous system (like drowsiness and movement disorders), official warnings indicate that patients should avoid driving or operating hazardous machinery until they are reasonably certain the medicine does not impair their cognitive and motor functions.


Q: Is it possible to develop a dependence on Serenase?

Haloperidol is not classified as a controlled substance with a risk of dependence by regulatory bodies. However, because official prescribing information recommends that the dose be gradually tapered when stopping treatment, the requirement for tapering upon discontinuation underscores the importance of following a healthcare professional’s guidance to manage potential withdrawal effects.


Q: What kind of studies support the use of Serenase?

The use of the medicine is supported by evidence primarily derived from short-term Randomized Controlled Trials (RCTs) and other controlled studies. These studies monitored outcomes in both adult and, for certain indications, child and adolescent populations across its approved uses.


Q: Is it true that Serenase can be used in emergency situations?

Yes. The haloperidol lactate injection form is officially indicated for the management of patients with acute psychiatric conditions, such as severe behavioral disturbances or acute agitation, which may occur in emergency settings.


Q: What is the evidence for using Serenase in children?

Official information indicates approved use for the treatment of severe behavioral problems and hyperactivity in children who have failed to respond to other treatments. It is also approved for certain age thresholds in Tourette’s disorder.


Q: How often do people need blood tests while taking Serenase?

Regulatory sources recommend the need for periodic monitoring, which may include electrolyte monitoring (especially if taking diuretics). For patients with a history of low white blood cell count, Complete Blood Count (CBC) monitoring is recommended frequently during the initial months of therapy.


Q: Can Serenase be split or crushed?

Regulatory documents do not provide procedural rules permitting the tablet form to be split or crushed for administration. For the liquid form, official guidance requires the use of a calibrated dropper to ensure accurate measurement.

How should Serenase be stored and disposed of?

The official storage and disposal guidelines for Serenase (Haloperidol) are designed to maintain product integrity and ensure public safety, based on government regulatory documentation.

Required Storage and Protection

The medicine must be stored at Controlled Room Temperature (CRT), typically 20 C to 25 C (68 F to 77 F). Haloperidol must be protected from light and kept away from excess heat and moisture (e.g., not stored in a bathroom). Official labeling strictly instructs users to Keep this medication in the container it came in, ensure it is tightly closed, and out of reach of children.

Prohibited Storage and Disposal Rules

It is mandatory not to refrigerate or freeze the product, especially the liquid forms, to prevent degradation. When discarding unused or expired Serenase, regulatory guidance recommends using a drug take-back program. If this option is unavailable, the medicine should be mixed with an undesirable substance (e.g., coffee grounds) and sealed in a bag for household trash disposal; it must not be disposed of in wastewater.

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

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