Sojourn

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Sojourn

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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 Sojourn

Property Description
Active ingredient Sevoflurane
Form Volatile Liquid (for Inhalation)
Pharmacological Class General Anesthetic Agent
Common Use Induction and Maintenance of General Anesthesia
Origin Synthetic Compound (Halogenated Ether)

What is Sojourn and What Pharmacological Class Does it Belong To?

Sojourn is a prescription-only pharmaceutical preparation utilized to achieve and maintain a state of general anesthesia during medical procedures. Its active ingredient is Sevoflurane, a synthetic halogenated ether. Sojourn is classified as an inhalation general anesthetic agent. This classification establishes its role as a powerful, controllable agent acting systemically on the central nervous system, ensuring that patients are temporarily and safely rendered unconscious, immobile, and insensitive to pain for the necessary duration of the intervention. This approach is clinically recognized for providing predictable management of the unconscious state during surgery.


Composition, Form, and General Therapeutic Purpose

Sojourn is supplied as a volatile liquid formulation, meaning the preparation must be converted into a breathable vapor using specialized anesthetic equipment before it can be delivered to the patient via the inhalation route. Its composition relies entirely on the single-ingredient, synthetic compound Sevoflurane, which is chemically defined as a fluorinated methyl isopropyl ether. This agent is intended for use in inducing and maintaining general anesthesia across patients of all ages. This confirms the medicine's core purpose is to facilitate surgical procedures by guaranteeing controlled and reversible loss of consciousness and protective reflexes.


How Sojourn Differs from Other Anesthetics

The performance characteristics of Sojourn, driven by its Sevoflurane component, distinguish it from older anesthetic agents, primarily through its low solubility in the blood, often measured by a low blood-gas partition coefficient. Sevoflurane's low solubility contributes to rapid wash-in and wash-out. This characteristic reinforces the critical practical benefit of a relatively rapid onset of unconsciousness for the patient and a rapid recovery once the agent is discontinued. This efficiency allows for greater clinical control and minimizes the duration required for the patient to awaken post-procedure.

Regulatory References

  1. Sevoflurane - Union Register of medicinal products

What side effects are possible with Sojourn?

Possible Side Effects and Safety Information

The safety profile of Sojourn (Sevoflurane) is structured according to the categories and classifications established by official regulatory agencies, such as the FDA and EMA. Adverse reactions are grouped by frequency of occurrence and the affected physiological system, without providing patient instructions or clinical advice.

Official Adverse Reaction Listings

Adverse effects officially classified as very common (occurring in ge 1/10 of patients) primarily include hypotension (low blood pressure), nausea, and vomiting. Reactions classified as common (occurring in ge 1/100 to < 1/10 of patients) span multiple system-organ classes and include bradycardia (slow heart rate), tachycardia (fast heart rate), cough, fever, and agitation upon emergence.

Serious Adverse Reactions and Special Safety Considerations

The medicine is officially associated with rare but clinically critical safety events. These include the potential for triggering Malignant Hyperthermia (MH) in genetically susceptible individuals, and the risk of Perioperative Hyperkalemia which can lead to severe cardiac arrhythmias, especially noted in pediatric patients with latent or overt neuromuscular disease. Isolated reports of QT prolongation and hepatic dysfunction have also been received in post-marketing experience.

Safety notes specify that effects like hypotension and respiratory depression are dose-dependent and increase as the depth of anesthesia is raised. A specific non-patient-related safety restriction exists regarding the interaction with desiccated strong alkaline CO2 absorbents within the anesthesia machine, which can lead to degradation product formation and potentially exothermic reactions.

Overdose and Emergency Response

Sojourn overdose is officially documented as a state of excessive anesthetic depth resulting in significant physiological changes. The primary clinical manifestations of overdosage are respiratory depression and circulatory insufficiency, which commonly present as profound hypotension (low blood pressure) and bradycardia (slow heart rate). Severe or life-threatening outcomes can include cardiac arrest and the potential for triggering Malignant hyperthermia in susceptible individuals.

Regulators mandate immediate, non-advisory actions upon suspected overdose. The required first step is the immediate discontinuation of Sojourn administration. This must be followed by controlled ventilation with pure oxygen to maintain a patent airway and implementing measures to ensure stable cardiovascular function. As no specific antidote is known, management is strictly based on general symptomatic and supportive measures.

Urgent medical attention is required when symptoms of overexposure persist. Furthermore, the official labeling states that a poison control center must be contacted immediately following any accidental ingestion of a large amount. A critical population-specific risk noted is perioperative hyperkalemia leading to severe cardiac complications, including arrhythmias and death, in certain pediatric patients.

Therapeutic Uses of Sojourn

What Sojourn Treats: Main Uses and Benefits

Sojourn (Sevoflurane) is utilized in the specialized field of anesthesiology to achieve a state of general anesthesia, which is essential for facilitating all types of surgical procedures. Its primary therapeutic goal is used for managing the body’s systemic responses, contributing to patient safety and comfort throughout the intervention.

This agent is commonly used to help with the induction and maintenance of general anesthesia in patients undergoing inpatient and outpatient surgery. The medication addresses critical symptom clusters, ensuring the temporary and controlled loss of consciousness, insensitivity to pain (nociception), and prevention of any unwanted motor response to surgical stimuli.

Clinical Scenarios and Patient Benefit

This agent is applied in clinical settings that require a quick and smooth transition into unconsciousness, contributing to the efficiency of managing the anesthetic state. It is considered relevant across the full spectrum of patients, including adults and pediatric patients, and is considered relevant for the smooth, rapid inhalational induction in children. This short recovery profile may assist with minimizing the duration of postoperative confusion and supports the maintenance of functional stability.

“The medicine helps support the patient during difficult episodes by easing distress and may assist with maintaining functional stability after the procedure.”


Property Description
Quick Fact: Relief for Heightened Consciousness The primary benefit is the controlled, temporary suppression of awareness, which is used for managing the patient's conscious experience of the surgical procedure.

Regulatory References

  1. NIH DailyMed: SEVOFLURANE liquid label

Eligibility and Restrictions for Use

Who Can and Cannot Use Sojourn?

Eligibility for Sojourn (Sevoflurane) is strictly governed by regulatory authorities and is determined by a patient’s medical history, age, and pre-existing conditions.


Prohibited Use (Contraindications)

Sojourn must not be used in patients with a known or suspected genetic susceptibility to malignant hyperthermia (MH). Use is also formally contraindicated in individuals with a known sensitivity or hypersensitivity to sevoflurane or any other halogenated inhalation anesthetics. Additionally, the medicine should not be used in patients who have a history of developing liver dysfunction or unexplained fever following a previous exposure to a halogenated agent.


Age and Condition-Based Restrictions

The medicine is officially approved for use in adult and pediatric patients, including full-term neonates. Caution is specifically required for use in children younger than 3 years, especially during prolonged procedures.

Conditional use is noted for patients with pre-existing conditions: use requires careful assessment in cases of severe hepatic or renal impairment, where safety has not been fully established. Caution is also required for patients with Down syndrome or certain neuromuscular diseases.

Pregnancy and Lactation

During pregnancy, Sojourn should be used only if clearly needed. While its use is permitted for Caesarean section, safety has not been demonstrated for vaginal delivery. Nursing mothers are advised to skip breastfeeding for 48 hours following administration.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents define the interaction profile of Sojourn (Sevoflurane) primarily by pharmacodynamic potentiation and a unique substance-equipment chemical reaction.


Pharmacodynamic Potentiation and Additive Effects

Co-administration with opioid analgesics, benzodiazepines, and Nitrous Oxide (N₂O) produces an additive CNS depressant effect, which officially necessitates a reduction in the required anesthetic concentration (MAC). Sevoflurane also potentiates the effect of non-depolarizing neuromuscular blocking agents, requiring a corresponding dosage reduction of those agents. Caution is required when using Sevoflurane with other drugs that prolong the QTc interval due to documented reports of QT prolongation.


Substance-Equipment and Metabolic Interactions

Sevoflurane is chemically incompatible with desiccated CO2 absorbents, particularly those containing potassium hydroxide (KOH), which must not be used. This chemical reaction causes the degradation of Sevoflurane into Compound A, a substance officially associated with a renal tubular degeneration risk. This official concern imposes procedural constraints, such as mandatory minimum fresh gas flow rates, to limit patient exposure. Additionally, medicinal products that increase the activity of cytochrome P450 isoenzyme CYP2E1, such as Isoniazid or chronic alcohol use, may increase the metabolism of Sevoflurane.

Mechanism of Action

Sojourn (sevoflurane) is a volatile anesthetic that primarily acts by modulating key neurotransmitter receptors in the central nervous system to influence physiological responses.


Modulation of Inhibitory and Excitatory Synaptic Signaling

Sojourn acts within domains involving receptor-mediated signaling by enhancing the activity of inhibitory channels, such as the GABA A and glycine receptors, while simultaneously inhibiting excitatory synaptic activity at receptors like NMDA and nicotinic acetylcholine receptors. This dual-action mechanistic cascade modifies the early molecular steps of neural transmission, resulting in decreased excitability of central nervous system neurons via broad CNS depression.


Influence on Ion Channel and Ca^2+ Current Dynamics

The drug engages mechanisms involving cellular excitability by affecting several ionic currents, including various voltage-gated Ca^2+ and K^+ channels. This influence affects the membrane excitability of neurons and myocardial cells by affecting cellular Ca^2+ homeostasis. This action alters the threshold for cardiac depolarization and force generation.


Modulation of Central Pathway Activity and Metabolic Rate

Sojourn influences systems where targeted pathway adjustment is required, specifically by altering overall cerebral metabolic rate and cerebral blood flow via dose-dependent vasodilation of cerebral vasculature. This modulation affects processes driven by distinct signaling patterns within the brain, leading to systemic changes in neural pathway activity consequent to the induced global CNS depression.

Dosage and Administration Information

How to Use Sojourn (Sevoflurane) — Official Administration Guidelines

Sojourn is the brand name for sevoflurane, a volatile liquid administered by inhalation for the induction and maintenance of general anesthesia. Its use is strictly procedural, requiring administration by or under the direct supervision of a trained healthcare professional, such as an anesthesiologist, in a controlled hospital or surgical environment.

Administration Protocol

Route of administration: Inhalation (administered as a vapor/gas).

Dosing Schedule: Dosage must be individualized based on the patient's clinical response and must be delivered via a vaporizer calibrated specifically for sevoflurane. The typical concentration for the maintenance of surgical anesthesia ranges from 0.5% to 3% and may be used with or without nitrous oxide. The required dose is primarily guided by the patient’s age, as the Minimum Alveolar Concentration (MAC) decreases with increasing age.

Age-Group Administration Rules

The required dose to maintain anesthesia is lower in older patients. For instance, the target MAC for infants (1 to <6 months) is approximately 3.0%, while for adults aged 60, it is approximately 1.7%.

Age of Patient (years) Target Sevoflurane in Oxygen
1 to <6 months 3.0%
40 2.1%
60 1.7%

Special Procedural Conditions: Sojourn is administered on an as-needed basis for the duration of a single procedure. The CO2 absorbent material (e.g., soda lime, Baralyme) in the anesthesia circuit must be replaced if it is suspected to be desiccated (dried out) to prevent potential breakdown product formation. Missed-dose instructions do not apply, as the administration is confined to the procedural period.

Recent Clinical Evidence

Research evidence / Overview of studies for Sojourn

Evidence for Use in Inducing and Maintaining General Anesthesia

Research exploring the use of Sojourn (Sevoflurane) in general anesthesia has relied on studies conducted during periods of increased symptom activity—namely, surgery. This body of evidence primarily includes Randomized Controlled Trials (RCTs) and systematic reviews that were applied in studies examining patient experiences during general anesthesia. The research examined the process of reaching and maintaining a state of unconsciousness in studies.

Studies reported specific measurements regarding how quickly the anesthetic effect began following inhalation. Research also described the agent’s physical properties, detailing its low solubility. Studies examined patterns related to emergence, which is the process of waking up once the administration of the agent is stopped. Research highlights changes measured during the study period, helping to contextualize how symptoms evolved in the observed populations.

Comparative Research and Recovery Profiles

This section summarizes studies that explored how Sojourn compares to other inhaled or intravenous anesthetic agents. This research examined measurable kinetic differences between agents, focusing on the agent’s physical solubility and exploring patterns related to clinical time to recovery markers. Comparative trials reported a specific pattern in which the agent’s low solubility was studied in research examining measurements of time intervals for patients to reach defined recovery endpoints compared to some older agents that were studied. Data show patterns related to certain short-term outcomes, but the research does not definitively establish which anesthetic agent may be linked to better long-term survival or major adverse events, as these outcomes are influenced by many non-drug-related factors.

Studies in Special Patient Populations

Research was evaluated in populations that require specific anesthetic management. Studies report how symptoms evolved in the observed populations, describing the agent’s use in adults and providing findings related to its use in children, including data on the quality of induction, such as the incidence of coughing or breath-holding. Research highlights changes measured during the study period regarding physiological stability, even in populations presenting with pre-existing conditions.

The Landscape of Evidence Gaps and Uncertainty

What remains uncertain is the full profile of long-term outcomes. The primary trials had limited follow-up durations, meaning evidence for long-term effects is not fully established. Comparative evidence is lacking for certain specific, rare events, and data for certain patient groups remain insufficient. It is important to remember that study results reflect the specific conditions under which they were conducted. Research describes group patterns, but this evidence does not determine whether an individual patient will respond similarly.

Key Studies & References SEVOFLURANE liquid label - NIH DailyMed (Regulatory Monograph)

Frequently Asked Questions (FAQ)

Common questions about Sojourn (FAQ)


Q: How long can a person expect to feel drowsy or dizzy after receiving Sojourn?

A: Regulatory documents indicate that drowsiness and dizziness are possible side effects following administration of Sojourn. While the agent facilitates rapid recovery, specific timelines for residual effects like drowsiness or dizziness in individual patients are not defined in the drug's official label. Official labeling indicates that general anesthetics may impair mental and physical abilities for an unknown period.

Q: What is the difference between Sojourn and an intravenous (IV) anesthetic?

A: Sojourn is a volatile liquid for inhalation, meaning it must be administered as a breathable vapor or gas. In contrast, IV anesthetics are administered by direct injection into the bloodstream. This difference in administration, along with Sojourn’s low solubility, is noted to facilitate rapid onset and offset of effect.

Q: Is shivering a known or common effect experienced by patients recovering from Sojourn?

A: Shivering is listed among the commonly reported physical effects seen during recovery from general anesthesia. It is one of the temporary physical effects sometimes experienced upon emergence from the procedure.

Q: What are the signs of a hypersensitivity or allergic reaction to Sojourn or similar anesthetics?

A: Official information states that Sojourn is contraindicated (must not be used) in patients with a known sensitivity or allergy to sevoflurane or other similar agents. Signs of an allergic reaction are not typically listed, but severe symptoms warrant immediate medical attention.

Q: Are headaches a common side effect reported by patients who have received Sojourn?

A: Headaches have been reported as a possible side effect after receiving Sojourn, but they are not listed among the most frequently occurring adverse effects (classified as 'very common' or 'common') in the regulatory documents.

Q: Is Sojourn use contraindicated for patients with a history of seizures or convulsions?

A: A history of seizures or convulsions is noted as a factor in regulatory-linked databases that warrants medical review prior to administration. Official drug information requires a doctor’s assessment due to potential disease interactions.

Q: Are there any over-the-counter medications, vitamins, or herbal products that may interact with Sojourn?

A: Official documents list specific interactions with certain classes of prescription medications. Patients should inform their anesthesiologist of all over-the-counter products, vitamins, and herbal supplements they are taking prior to receiving Sojourn, as interactions may exist.

Q: What non-prescription drugs are listed as major or moderate interactions with Sojourn?

A: Regulatory information lists interactions based on the pharmacological effect of the medicine, such as those that cause CNS depression (like benzodiazepines) or pain relief (like opioid analgesics). Patients are reminded to disclose any non-prescription drugs they take that may belong to these general interacting classes.

Q: Is it normal to feel anxious or resistant right before the administration of an inhaled anesthetic like Sojourn?

A: The use of pre-anesthetic medication, which may include agents to help manage anxiety or resistance, is common. Official documents state that the decision to use this pre-medication is left to the discretion of the anesthesiologist.

Q: What is the general timeline for the full effects of Sojourn to wear off after the procedure?

A: Official labeling recommends against driving or operating hazardous machinery for an appropriate period following general anesthesia due to potential residual effects. The time required for the full return of mental and physical abilities varies, and professional medical guidance is necessary to determine readiness.

Q: What does official documentation say about the need for assistance after receiving Sojourn for outpatient surgery?

A: Professional guidelines aligned with regulatory standards for outpatient general anesthesia typically mandate that patients must be discharged only with the assistance of a responsible adult escort. This is intended to provide monitoring and support during the immediate post-procedure period.

Q: Does the drug have a pleasant or unpleasant odor when administered?

A: Official product information describes Sojourn (sevoflurane) as having a non-pungent odor. This characteristic is cited as making the product suitable for mask induction of anesthesia, as it does not cause irritation to the respiratory system.

Q: Is Sojourn available in a generic formulation?

A: Yes. Sojourn is a brand name for the active ingredient, sevoflurane. Regulatory bodies confirm that generic versions of sevoflurane, which contain the same active ingredient, are widely approved and available from multiple manufacturers.

Q: What is the classification system used by official sources to categorize drug interactions (major, moderate, minor)?

A: The core regulatory label focuses on the pharmacodynamic effect of an interaction, such as potentiation (making other drugs stronger) or causing additive CNS depression. While the label does not use a three-tiered system (Major/Moderate/Minor), regulatory-linked databases use such classifications to help clinicians assess and manage the risk of potential interactions.

Q: Why are patients sometimes given medication before the administration of Sojourn?

A: The decision to use pre-anesthetic medication is at the discretion of the anesthesiologist. This is often done to help manage patient anxiety or pain before the general anesthesia procedure begins.

Q: What is the regulatory status of Sojourn—is it approved for both inpatient and outpatient settings?

A: Yes, Sojourn is officially indicated and approved for the induction and maintenance of general anesthesia in both adult and pediatric patients for inpatient and outpatient surgery.

Q: Does the use of Sojourn affect eye pressure or vision upon waking?

A: Vision changes are not typically listed as a common side effect of Sojourn. However, clinical studies indicate that the drug may cause a decrease in intraocular pressure (IOP) during the period of anesthesia.

Q: What types of procedures or surgeries is Sojourn specifically not recommended for?

A: Official information states that the medicine's safety for use in vaginal delivery has not been established, and it is therefore not recommended for that specific procedure. Additionally, it is contraindicated in patients with conditions like Malignant Hyperthermia susceptibility.

Q: What kind of monitoring equipment is used while a patient is receiving Sojourn?

A: Specialized monitoring is mandatory during administration. Equipment used includes a calibrated vaporizer and a sevoflurane gas analyzer to measure the concentration being delivered. Professional guidelines also require continuous monitoring of vital signs such as oxygenation, ventilation, and circulation.

Q: Does a patient need to fast or follow specific dietary rules before receiving Sojourn?

A: Yes. Pre-operative instructions aligned with regulatory safety standards typically mandate a period of fasting (no food or certain liquids) before the procedure. This safety measure helps reduce the risk of complications, such as a patient aspirating stomach contents, during the period of unconsciousness.

How should Sojourn be stored and disposed of?

Sojourn (sevoflurane) must be stored and handled according to specific conditions mandated by regulatory bodies to maintain the integrity of the volatile liquid and ensure safe management.

Storage Conditions and Handling

The product must be stored in a cool and well-ventilated area, with the temperature not exceeding 25 C (77 F). The official labeling specifies not to refrigerate the product. The container must be kept tightly closed to prevent evaporation and preserve product purity, and it is mandatory to keep out of the reach of children.

Disposal Instructions

Any unused or expired Sojourn and its container must be disposed of in accordance with local, regional, and national regulations. Due to the product's classification, environmental precautions are required to avoid discharge into drains, water courses, or onto the ground.

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

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