Anesketin

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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 Anesketin

Quick Facts

Property Description
Active Ingredient Ketamine Hydrochloride
Form Aqueous Solution for Injection
Pharmacological Class General Anesthetic, Dissociative Subclass
Common Use Inducing and maintaining general anesthesia
Origin Synthetic compound (Cyclohexanone derivative)

Anesketin: Definition and Core Composition

Anesketin is a specialized injectable veterinary medicinal product whose core component is the single active ingredient, ketamine hydrochloride. The preparation is formulated as a stable aqueous solution for injection, ensuring a reliable parenteral route of administration. This substance is a synthetic compound, chemically recognized as a cyclohexanone derivative, which is supplied as a racemic mixture. The manufacturer, Dechra Veterinary Products, holds the Marketing Authorisation in various regions, indicating established regulatory oversight for this specific formulation.

Pharmacological Type: Dissociative General Anesthetic

Anesketin is definitively categorized within the high-level General Anesthetic pharmacological class, distinguishing itself as a Dissociative Anesthetic agent. This classification is clinically recognized for producing a unique anesthetic state. Ketamine's primary action involves noncompetitive antagonism of the N-methyl-D-aspartate (NMDA receptor). This indicates the medicine works by blocking specific receptors in the nervous system that are crucial for transmitting pain and consciousness signals. The characteristic rapid onset of action is a well-established property within anesthetic literature.

General Purpose and Benefit

The general purpose of Anesketin is to quickly and reliably achieve a controlled state of general anesthesia and provide profound analgesia (pain relief) necessary for diagnostic and surgical procedures. Its function involves inducing anesthesia that supports airway patency and protective reflexes. This means the drug is valuable because it can rapidly create a controlled anesthetic state while helping the patient maintain some of the body's natural defense mechanisms. This profile contributes to a controlled, stable anesthetic induction.

What side effects are possible with Anesketin?

Possible side effects and safety information

The safety profile of Anesketin (Ketamine Hydrochloride) is officially documented by regulatory authorities, with adverse reactions generally grouped by the system-organ classes affected and their frequency of occurrence. The most frequently documented effects relate to the cardiovascular, nervous, and psychiatric systems.

Adverse Reactions and System Groupings

The most common adverse reactions reported are hypertension (increased blood pressure) and tachycardia (increased heart rate), which typically present as a transient elevation shortly after administration. Psychiatric disorders, commonly termed emergence phenomena, are also classified as common. These may involve vivid dreams, confusion, or visual distortions during the recovery period.

System-Organ Class Examples of Documented Effects
Cardiovascular Hypertension, Tachycardia
Psychiatric Emergence reactions, Delirium, Hallucinations
Respiratory Respiratory depression, Apnea (risk increased with rapid IV)
Nervous System Nystagmus, Increased muscle tone

Serious Safety Considerations

Official labeling highlights the risk of severe respiratory depression and apnea, particularly following rapid intravenous injection. Additionally, drug-induced hepatic injury and severe, irritative urinary tract symptoms (cystitis) have been associated with a history of chronic or repeated, long-term exposure. The medicine is contraindicated in individuals with a known hypersensitivity or in patients where a substantial increase in blood pressure would pose a serious hazard, such as those with severe hypertension or cardiac decompensation.

Safety Patterns and Populations

Regulatory documents note that emergence phenomena are typically observed during the recovery phase. Furthermore, specific cautions apply to patients with pre-existing conditions; for example, those with severe hepatic impairment require careful consideration due to the drug's metabolism.

Overdose and Emergency Response

Overdose and When to Seek Help

This information describes the documented clinical manifestations and required emergency actions for an overdose of Anesketin (ketamine hydrochloride injection), as defined by official governmental regulatory sources.

Documented Overdose Manifestations

Overdosage is primarily characterized by effects on the respiratory system. The key signs documented in official labeling include respiratory depression and apnea (cessation of breathing). These effects may be exacerbated by too rapid intravenous administration.

Overdoses, including those reported at up to ten times the typical required dose, may result in a prolonged recovery period. Severe outcomes documented in the overdose context include an enhanced pressor response (increased blood pressure) and, potentially, cardiac arrest.

Required Emergency Actions

Urgent medical attention is required immediately upon the suspicion or confirmation of an overdose, particularly if respiratory function is compromised.

Overdose Sign Required Regulator Action (Supportive)
Respiratory Depression/Apnea Employment of supportive ventilation; mechanical support of respiration is the preferred treatment.
Convulsions (if present) Treatment should begin with intravenous diazepam, followed by phenytoin or thiopental if ineffective.

Crucially, regulatory documents state that no specific antidote is available for ketamine overdose, meaning management relies entirely on supportive and symptomatic care to address life-threatening signs.

Therapeutic Uses of Anesketin

What Anesketin Treats: Main Uses and Benefits

Anesketin is commonly used to manage symptomatic needs across general anesthesia and pain management domains. This medication is applied in clinical settings that involve acute or unstable symptom patterns where a profound loss of consciousness is often required. Its primary indications include the induction of general anesthesia, providing relief from pain for acute episodes, and is relevant for easing symptoms that interfere with daily functioning (restraint) for complex procedures.

The drug is relevant for easing symptom clusters that may become intense or disruptive, especially the severe physical discomfort associated with trauma or the immediate postoperative period. It is considered relevant in conditions characterized by periods of heightened symptoms that require supportive relief. The medication is considered relevant for its ability to help maintain functional stability, such as supporting breathing, and assists with managing symptoms related to systemic imbalance during the anesthetic period.

Quick Fact: Relief for Acute Pain

Symptom Domain Primary Therapeutic Benefit
Consciousness/Awareness Supports the management of symptoms related to consciousness and awareness.
Severe Physical Discomfort Contributes to easing the overall symptom load through effective pain relief.
Uncontrolled Movement Helps manage symptoms that create noticeable functional strain (immobilization).

Regulatory References

  1. DailyMed Label for Ketamine Hydrochloride Injection (Veterinary Use)

Eligibility and Restrictions for Use

Who can and cannot use Anesketin?

Eligibility for Anesketin, a veterinary general anesthetic, is strictly defined by regulatory documentation based on the target species and the patient's pre-existing health status.

Eligibility Scope

Classification Status According to Regulatory Labeling
Target Species Cats, Dogs, and Horses (use also documented for restraint in Subhuman Primates).
Age Restriction Not indicated in kittens under 12 weeks of age.
Reproductive Status Safe use during pregnancy and lactation has not been established.

Absolute Contraindications (Must Not Use)

Anesketin is formally contraindicated by regulatory authorities for use in animals with the following conditions:

  • Organ Failure: Pre-existing severe hepatic or renal failure.
  • Cardiovascular/Ocular: Severe cardiac decompensation, severe hypertension, or glaucoma.
  • Neurological: Eclampsia, pre-eclampsia, or known hypersensitivity to the active substance or excipients.

Eligibility-Related Restrictions

Official labeling imposes conditions and limitations on use:

  • The medicine is contraindicated as a sole anesthetic agent in the horse or the dog.
  • It should be used with caution in animals with pre-existing seizure disorders or cardiovascular abnormalities.
  • It is prohibited for certain surgical procedures unless sufficient muscle relaxation is ensured by a co-administered muscle relaxant.

The regulatory profile thus defines a clear boundary: use is restricted to specific target species under certain conditions and is absolutely prohibited for animals with defined high-risk comorbidities.

What should I know about interactions with other medicines?

Anesketin’s interaction profile is characterized by significant pharmacodynamic (PD) risk associated with the co-administration of other medicinal products. The profile centers on the potential for additive effects on the central nervous system and the potentiation of systemic activity.

Pharmacodynamic Interaction Risks

Co-administration with CNS Depressants, including Opioid Analgesics, Benzodiazepines, and Alcohol, is associated with the official regulatory outcome of profound sedation, respiratory depression, coma, and death.

Furthermore, co-administration with Theophylline or Aminophylline may lower the seizure threshold, and combination with Sympathomimetics or Vasopressin is documented to enhance the sympathomimetic effects of Anesketin.

Clearance and Exposure Modification

The labeling identifies several substances that modify exposure and recovery:

  • Prolonged Recovery: Co-administration with Barbiturates or Opioid Analgesics is associated with a prolonged recovery time from the anesthetic state.
  • Metabolic Pathway: Anesketin is metabolized primarily by the hepatic enzyme CYP3A4, with minor involvement from CYP2B6 and CYP2C9.

Population-Specific Constraints

A key population constraint is that preexistent conditions such as Hepatic or Renal Insufficiency are officially expected to prolong the duration of anesthesia due to the resulting alteration in drug clearance.

Mechanism of Action

How Anesketin Works at the Biological Level

The action of Anesketin is primarily defined by its core mechanism as a non-competitive antagonist of the N-methyl-D-aspartate (NMDA) receptor. This antagonism involves the drug binding within the channel pore, which prevents the flow of ions and reduces excitatory signaling through the glutamatergic system.

This molecular blockade selectively disrupts information processing within the thalamoneocortical system, a cascade that results in the characteristic physiological state of dissociative anesthesia and central reduction of nociception.

Concurrently, Anesketin influences secondary pathways by inhibiting the neuronal reuptake of key monoamines (like norepinephrine) and acting as an agonist at specific Opioid receptors. This dual action stimulates the sympathetic nervous system, contributing to a specific combination of cardiovascular stimulation and modulation of nociceptive pathways.

Furthermore, the resulting cellular disinhibition activates AMPA receptors and signaling molecules like BDNF. This process engages mechanisms that influence pathway regulation, resulting in synaptogenesis and contributing to the resulting physiological changes associated with the drug.

Dosage and Administration Information

How to Use Anesketin

Anesketin (ketamine hydrochloride injection) is a specialized injectable medicinal product used exclusively under the supervision of a licensed veterinarian. Its usage is characterized by specific parameters concerning the administration route, precise dosage, and procedural context.

Administration Routes and Dosing

The medication is approved for parenteral administration. The primary route for use as a sole anesthetic agent is Intramuscular (IM) injection, but it is also authorized for Intravenous (IV) and Subcutaneous (SC) routes when used as part of combination protocols. It is supplied as an aqueous solution at a standard strength of 100 mg ketamine base per milliliter.

Dosing is calculated strictly on the subject’s body weight and procedure type. For minor procedures in cats, the IM dose range is 22 to 33 mg/kg, with the provision not to exceed 50 mg/kg during a single procedure. The dosage for subhuman primates typically ranges between 3 and 15 mg/kg, depending on the species.

Usage Patterns and Procedural Context

Anesketin is administered as a single injection for the rapid induction of anesthesia during short diagnostic or surgical events. If the procedure requires a prolonged anesthetic state, additional, incremental doses may be necessary for maintenance. The anesthetic effect following the initial IM dose typically lasts between 30 and 45 minutes.

While not mandatory, pre-operative fasting is advisable for at least six hours before elective surgical use. Furthermore, animals should be kept in a calm environment and not be stimulated by sound or handling during the recovery period to ensure proper emergence from anesthesia.

Recent Clinical Evidence

Research evidence / Overview of studies for Anesketin

Evidence Supporting Anesthesia and Restraint

Anesketin was studied for its use in inducing a controlled anesthetic state, which is relevant in trials assessing short-term or episodic symptom patterns used for diagnostic or surgical procedures. The research base includes extensive regulatory submission data and controlled clinical trials. These studies monitored outcomes that research describes related to the achievement and duration of the anesthetic state itself, as well as the time required for a state of chemical restraint to be achieved. Researchers focused on populations including domestic cats and various species of subhuman primates.

The findings describe patterns observed in the studies related to the monitoring of physiological markers during the anesthetic phase. Research also examined whether protective airway reflexes were preserved in the observed populations. The majority of research focuses on its use in combination with other agents, although some clinical records noted patterns of rough or uneven recovery when the medicine was observed in studies as a sole agent.

Research on Supplemental Pain Relief

The medicine was evaluated in randomized controlled trials and systematic reviews of animal studies for research exploring outcomes related to physical discomfort, particularly after surgery. This research explored short-term symptom changes in populations including domestic cats and dogs. Studies monitored pain relief by examining changes measured during the study period, often using standardized pain scoring scales, and by tracking the administration of rescue pain medication.

Findings describe patterns observed in the studies related to changes in postoperative pain scores compared to control groups. Research also highlights patterns measured during the study period related to the documentation of other opioid analgesic medications when the drug was associated with a pain management plan. The data is mainly derived from trials where the medicine was administered as one part of a larger, multi-drug pain protocol.

Summary of Evidence Gaps and Areas of Uncertainty

While the core regulatory data for anesthesia is considered high, the evidence quality varies across studies in other contexts. The contribution of the medicine was observed in combination since it was commonly used with other anesthetic or analgesic drugs, making its independent effect challenging to determine. Long-term effects are not fully established, and there is limited information for long-term outcomes that may extend beyond the immediate recovery phase.

Key Studies & References

  1. DailyMed Label for Ketamine Hydrochloride Injection (Veterinary Use)

Frequently Asked Questions (FAQ)

Common questions about Anesketin (FAQ)


Q: Is Anesketin considered a strong medication?

Official classification documents define the core component of Anesketin as a General Anesthetic. Its regulatory scheduling as a Controlled Substance indicates that the government maintains strict control over its use and distribution due to its potency and potential for misuse. This classification is the official regulatory view on the medicine's significance.


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

According to the official product information, Anesketin is described as having a rapid onset of action. The initial anesthetic effect is observed shortly after the correct administration route is used, allowing for quick procedure induction. This rapid onset is a key feature of its use in clinical settings.


Q: How long does the effect of one dose of Anesketin usually last?

For its intended use as a single intramuscular dose, official documents state that the anesthetic effect typically lasts approximately 30 to 45 minutes. If a longer procedure is required, additional, incremental doses may be necessary for maintenance. The total duration of the medicine's effect is dependent on the initial dose size.


Q: Are there any specific foods or drinks that should be avoided when using Anesketin?

Official labeling states that co-administration with substances classified as CNS depressants, which includes alcohol, is associated with pharmacodynamic risks such as profound sedation and respiratory depression. Furthermore, pre-operative fasting is generally advised for at least six hours before elective surgical use. The full consideration of dietary interactions is best discussed with a qualified professional.


Q: Does Anesketin carry a risk of dependence or addiction?

Due to its pharmacological profile, regulatory authorities classify Anesketin as a Controlled Substance. This classification requires official documents to contain warnings related to the potential for misuse, abuse, and dependence. Any concerns regarding its scheduling or potential for misuse are overseen by governmental agencies.


Q: What kind of studies have been done on Anesketin?

The research base supporting the use of Anesketin includes regulatory submission data and controlled clinical trials. These studies focused on achieving the desired anesthetic state, the duration of its effect, and exploring its use for supplemental pain relief in target species. The evidence quality varies across these different contexts.


Q: Do official documents mention any serious long-term side effects of Anesketin?

Regulatory documents have associated a history of chronic or repeated, long-term exposure with adverse events. These events include drug-induced hepatic injury and severe, irritative urinary tract symptoms (cystitis). The product labeling focuses on short-term use and notes that long-term effects are not fully established.


Q: Is it true that Anesketin can interact with common supplements like St. John's Wort?

Anesketin's metabolism is primarily managed by the CYP3A4 hepatic enzyme in the liver. Official information indicates that co-administration with any substance, including common supplements like St. John's Wort, that affects the function of this enzyme could potentially alter the intended duration and effect of the anesthetic.


Q: What is known about using Anesketin during pregnancy or while breastfeeding?

According to official regulatory documentation, the safe use of Anesketin during pregnancy and lactation has not been established in the target species. The consideration of potential risks during these periods is a clinical decision that must be determined by a qualified professional.


Q: What is the difference between Anesketin and its generic version?

Anesketin is the brand name formulation manufactured by Dechra Veterinary Products, which holds specific regulatory approval. The medication’s core component is the single active ingredient, ketamine hydrochloride, which may be available under other generic names but contains the same pharmaceutical substance.


Q: What common supplements or vitamins might interact with Anesketin?

The duration of action of the medicine is primarily regulated by the CYP3A4 enzyme in the liver. Official warnings indicate that substances, including certain vitamins or supplements, that affect this enzyme's function may potentially alter the intended drug exposure and recovery time.


Q: What are the legal restrictions on possessing or traveling with Anesketin?

Regulatory authorities classify Anesketin as a Controlled Substance. This classification places its possession, transport, and dispensing under specific governmental laws and regulations which restrict its access and distribution. These restrictions are in place due to the potential for misuse.


Q: Can Anesketin be stopped suddenly, or does it require a gradual reduction?

Anesketin is administered as a single injection for the rapid induction of anesthesia during short diagnostic or surgical procedures. The cessation of its effect naturally follows the clearance of the single dose from the system, and it is not a drug that requires a gradual reduction or tapering for its intended use.


Q: What are the official recommendations if I suspect an overdose of Anesketin?

Official documents indicate that immediate intervention for professional medical assistance is required in the event of a suspected overdose. The management of an overdose typically requires clinical intervention in a controlled environment to provide necessary respiratory and cardiovascular support.


Q: How do doctors generally classify the side effects of Anesketin (e.g., common, rare)?

Official safety documentation classifies adverse reactions by the System-Organ Class they affect, such as cardiovascular or psychiatric effects. These are then grouped based on their frequency of occurrence, designating effects like hypertension and emergence reactions as common and others as rare or serious.


Q: What is the recommended period of time Anesketin can be used for?

Regulatory documentation describes Anesketin's intended use as a single injection primarily for the induction of anesthesia during short diagnostic or surgical events. The product labeling focuses on short-term procedural use rather than continuous or extended administration.


Q: Why is Anesketin sometimes combined with other medications?

Anesketin is often used as one part of a multi-drug protocol because regulatory constraints specify that it is contraindicated as a sole anesthetic agent in some target species. Furthermore, it is combined with other agents like muscle relaxants to ensure sufficient relaxation is achieved for certain surgical procedures.


Q: Can Anesketin be split or crushed?

Anesketin is formulated as a sterile aqueous solution for injection supplied in a single-use container. It is not intended as a solid oral dosage form, such as a tablet, that can be split or crushed. The product's preparation and administration are restricted to methods performed by a qualified professional.

How should Anesketin be stored and disposed of?

Storage Requirements

Anesketin (ketamine hydrochloride injection) must be stored at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F). The product must be protected from light, and the vial must be kept in the original outer carton. Regulatory labeling explicitly states to not freeze the medication. For child safety, the product must be kept out of the sight and reach of children.

Stability and Disposal

The vial is a single-use container. Any unused portion of the product remaining after administration must be discarded. If the solution is diluted for use, regulatory guidelines require that it must be used immediately. Disposal of residual medication and the container must be performed according to established institutional policies for pharmaceutical waste.

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

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