Spino

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Spino

Method of action: Anesthetic

Treatment option:

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 Spino

Quick Facts

Property Description
Active Ingredients Bupivacaine Hydrochloride, Dextrose
Form Sterile Solution for Injection
Pharmacological Class Local Anesthetic (Amide-type)
Route of Administration Intrathecal (Spinal Injection)
Origin Synthetic
General Purpose Providing Regional Anesthesia

What is Spino? Definition and Pharmacological Classification

Spino is a prescription-only combination product that functions as a powerful, long-acting Local Anesthetic for regional procedures. Its primary active ingredient is Bupivacaine Hydrochloride, a synthetic compound that belongs to the amide-type Local Anesthetic class. This classification identifies the medicine for its ability to provide prolonged, temporary numbness in specific areas.

The core function of Bupivacaine is to stabilize the nerve cell membrane and interrupt the transmission of pain-carrying nerve impulses by blocking the sodium channels, thereby effecting local anesthesia. The amide-type structure contributes to a stable and extended long-acting effect compared to older anesthetics. The formula is a combination product because it also includes Dextrose, which is essential for defining the solution's specific physical behavior.

Spino's Unique Formulation and General Purpose

Spino is supplied as a sterile solution for injection intended exclusively for intrathecal administration, meaning it must be delivered directly into the subarachnoid space surrounding the spinal cord to produce a subarachnoid block. The long-acting nature of the Bupivacaine component makes this formulation a standard choice in hospital settings for providing regional anesthesia.

The product’s differentiating factor is its formulation as a hyperbaric solution, a physical state achieved by incorporating Dextrose (glucose) to increase the solution's density relative to the cerebrospinal fluid. This hyperbaric quality is instrumental, as it allows the medical specialist to achieve highly controlled distribution of the agent within the spinal column by using gravity and patient positioning. The overarching general purpose of Spino is to provide defined, predictable regional anesthesia to facilitate appropriate surgical or diagnostic procedures.

Regulatory References

  1. DailyMed product description

What side effects are possible with Spino?

Possible Side Effects and Safety Information

The officially documented safety profile for Bupivacaine hydrochloride, the active component in Spino, is structured by frequency and involves effects primarily within the Cardiovascular and Nervous Systems. Adverse reactions are classified based on regulatory clinical experience, distinguishing expected events from serious, rare occurrences.

Classification of Adverse Reactions

Adverse reactions are grouped by the standard frequency tiers used in regulatory documentation:

Frequency Tier System-Organ Class (SOC) Documented Adverse Reactions
Very Common (≥1/10) Vascular/Cardiac Disorders Hypotension (low blood pressure), Bradycardia (slow heart rate)
Common (≥1/100 to <1/10) Nervous System Disorders Postdural puncture headache
Uncommon (≥1/1,000 to <1/100) Nervous System Disorders Paraesthesia, Paresis (motor weakness)
Rare (<1/1,000) Immune/Nervous System Disorders Allergic reactions, Total unintentional spinal block, Paraplegia, Paralysis, Arachnoiditis

Serious Adverse Reactions

In rare cases, systemic exposure or high spread of the anesthetic may lead to serious adverse reactions, including Convulsions, Cardiovascular Collapse, Ventricular Arrhythmia, Cardiac Arrest, Respiratory Arrest, and Methemoglobinemia. Signs such as restlessness or lightheadedness may indicate potential initial Central Nervous System (CNS) toxicity.

Population-Specific Safety Considerations

Official labeling identifies specific populations requiring particular safety consideration. Older adults and individuals in the late stages of pregnancy have an increased risk of high or total spinal blockade, which may result in cardiorespiratory depression. Furthermore, patients with severe hepatic or renal impairment may face increased susceptibility to systemic toxicities. Known hypersensitivity to Bupivacaine or other amide-type local anesthetics is a formal safety constraint.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose of Spino, typically resulting from excessively high concentrations of Bupivacaine in the bloodstream, affects the central nervous system (CNS) and the cardiovascular system, according to government regulatory information.

Documented Overdose Manifestations

The most common early symptoms (prodromal signs) documented in prescribing information relate to CNS excitation and may include restlessness, dizziness, blurred vision, tinnitus, and tremors. As toxicity progresses, these can lead to convulsions and subsequent CNS depression and coma.

System Affected Severe Manifestations (Regulatory Status)
Cardiovascular Bradycardia, Ventricular Arrhythmias, Cardiovascular Collapse, Cardiac Arrest
Respiratory Respiratory Arrest, Apnea

When to Seek Urgent Medical Help

Official regulatory documents state that any delay in managing dose-related toxicity may lead to severe outcomes, including Death. Therefore, immediate medical attention is required when any signs of systemic toxicity are recognized. The required management includes the immediate availability of Oxygen, resuscitative drugs, and CPR equipment to initiate supportive treatment without delay.

Special caution is noted for patients with severe hepatic disease, who may be more susceptible to systemic toxicity, and for elderly or debilitated patients, for whom dose reductions are necessary to minimize risk.

Therapeutic Uses of Spino

What Spino Treats: Main Uses and Benefits

The primary therapeutic use of Spino (hyperbaric Bupivacaine/Dextrose solution) is commonly used to help produce surgical anesthesia in a sustained manner, applied in addressing symptoms related to physical discomfort during surgery. This medication is applicable within clinical settings that involve acute or disruptive symptom patterns stemming from surgical procedures on the lower abdomen, perineum, and lower extremities.

This solution is generally used across conditions presenting with acute episodes of surgical necessity, addressing the need for the total reduction of intense pain signaling and sensation from the site of intervention. This supports the patient during difficult episodes by easing distress and helps maintain symptomatic relief during the scheduled intervention. It is relevant for Conditions Requiring Major Surgical Intervention and specific scenarios like Obstetric Surgical Procedures.

The therapeutic benefit also includes the provision of skeletal muscle relaxation (motor block) in the affected region. This is relevant for managing symptoms of increased muscular activity that would interfere with the operation. The long-acting nature of the anesthetic may assist with a prolonged pain-relief period, offering symptomatic relief that helps patients cope more steadily with the immediate post-procedure phase.

“This regional anesthetic is relevant for managing acute, procedure-driven symptom intensity and supports the patient during the difficult episodes of immediate post-procedure phases.”

Quick Fact: Relief for Acute Pain
Symptom Category Intense Nociceptive Pain, Unwanted Motor Activity
Clinical Context Conditions Requiring Major Surgical Intervention, Obstetric Surgical Procedures
Benefit Supportive Relief from Intense Pain and Assistance with Muscular Relaxation

Regulatory References

  1. DailyMed product information from the U.S. National Library of Medicine

Eligibility and Restrictions for Use

Who Can and Cannot Use Spino? (Population Eligibility)

Official regulatory documents define strict eligibility criteria for the use of Spino (hyperbaric Bupivacaine/Dextrose solution for spinal injection).

Contraindicated Populations

Spino must not be used in patients with a known hypersensitivity to Bupivacaine Hydrochloride or any amide-type local anesthetic.

Absolute contraindications also include patients experiencing severe hemorrhage, severe hypotension, or shock, as well as those with active infection at the lumbar puncture site or septicemia.

This medicine is prohibited for use in obstetrical paracervical block anesthesia and Intravenous Regional Anesthesia (Bier Block).

Eligibility by Age and Condition

Population Group Regulatory Status
Pediatric (Under 18) Not recommended (safety/effectiveness not established).
Geriatric (65+ years) Use with caution (increased risk for hypotension).
Hepatic/Renal Impairment Use with caution (requires increased monitoring).
Pregnancy/Obstetrics Recommended for spinal anesthesia during labor/delivery.

Standard use is established for adult patients requiring subarachnoid block. Use in patients with conditions like G6PD deficiency requires specific caution due to increased risk of methemoglobinemia.

What should I know about interactions with other medicines?

The official regulatory profile for Spino (Bupivacaine Hydrochloride in Dextrose Injection) details specific pharmacodynamic and exposure-related interactions, with a focus on additive toxic effects.

Interaction Scope

Category Official Regulatory Statement
Medicinal product categories with documented interactions Other Local Anesthetic Agents and drugs structurally related to amide-type local anesthetics, such as certain anti-arrhythmics (e.g., lidocaine, mexiletine); Class III anti-arrhythmic drugs (e.g., amiodarone); and Drugs Associated with Methemoglobinemia (e.g., nitrates, nitrites, specific antibiotics, antineoplastic agents).
Mechanistic basis of interactions Additive Systemic Toxic Effects on the central nervous and cardiovascular systems; Additive Cardiac Effects; and Augmented Risk of Methemoglobinemia.
Population-specific interaction notes Patients with hepatic disease (especially severe) may be at increased risk of systemic toxicities due to the liver being the primary site of metabolism. Renal impairment may also lead to increased systemic exposure due to altered drug or metabolite excretion.
Interaction-related restrictions The regulatory label states a Mixing Prohibition: this specific solution must not be diluted or mixed with other local anesthetics or other drugs or diluents.

Resulting Interaction Structure

Official interaction statements:

  • Co-administration with other local anesthetics or structurally related anti-arrhythmic agents can result in additive systemic toxic effects.
  • Concurrent use with Class III anti-arrhythmic drugs requires close surveillance due to the potential for additive cardiac effects.
  • The risk of developing methemoglobinemia is increased when Bupivacaine is used alongside other oxidizing agents or drugs associated with this condition.

The regulatory profile is defined by pharmacodynamic reinforcement, documenting the additive systemic toxicity that results from co-administration with other anesthetic or structurally similar agents. Official documents also establish population-specific cautions for patients with hepatic or renal impairment where altered drug clearance may increase Bupivacaine exposure.

Mechanism of Action

Selective Interruption of Nerve Impulses

The core mechanism involves the active agent, Bupivacaine, binding to and blocking Voltage-Gated Sodium Channels ( Nav channels) within nerve membranes. By preventing the necessary influx of sodium ions ( Na^+), the drug inhibits the electrical depolarization required for nerve impulse conduction. This action inhibits action potential propagation, resulting in a reversible conduction blockade in the nerve pathways.

Differential Modulation and Fiber Susceptibility

The mechanism produces a differential effect on nerve fibers due to varying susceptibility of fiber types. The small, unmyelinated fibers responsible for A-delta and C fiber transmission (sensory and autonomic) are blocked more readily than the larger motor fibers. This physiological selectivity modifies signal transduction, leading to a sequential failure of sensory conduction followed by efferent motor conduction.

Physical Control via Hyperbaric Synergy

The formulation includes Dextrose, which acts as a baricity modulator to create a solution denser than the cerebrospinal fluid (CSF). This physical mechanism synergizes with the biological action, using gravity and positioning to precisely control the distribution of Bupivacaine within the subarachnoid space. This action controls the anatomical distribution of the active agent, leading to a localized, defined zone of reversible physiological interruption in the spinal nerve roots.

Dosage and Administration Information

Spino is administered exclusively via intrathecal injection, a specialized procedure that delivers the sterile solution directly into the subarachnoid space to achieve a spinal anesthetic block. This medicine is always used as a single-dose injection for a procedure and is not intended for repeated or continuous administration.

Dosing is precisely regulated and must be tailored to the specific surgical or obstetric procedure being performed, typically falling within ranges spanning 6 mg to 12 mg of Bupivacaine. For instance, the accepted dose range for Cesarean sections is 7.5 mg to 10.5 mg, while lower abdominal procedures often utilize 12 mg. Standard protocols require that the lowest possible effective dose must always be employed.

Specific procedural steps are essential for the proper use of Spino. Before injection, the colorless solution must be visually inspected for clarity and the absence of particulate matter. As a hyperbaric solution (containing Dextrose), its administration requires the specialist to control the resulting block height by carefully adjusting the patient's position and utilizing gravity. Furthermore, clinical guidelines require dose reductions for certain patient populations, including older adults, acutely ill, or debilitated patients, to align usage with their physical status.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Spino

Spino (hyperbaric bupivacaine/dextrose solution) was studied for regional anesthesia, primarily through numerous Randomized Controlled Trials (RCTs) and comprehensive reviews of that research. These studies were evaluated in hospital settings and research examined outcomes related to quickly and exploring the consistency of temporary numbness and muscle relaxation during surgery.


Evidence for Use in Major Surgical Interventions

The bulk of the evidence base is derived from research exploring its use for conditions associated with acute or disruptive episodes requiring surgical intervention, such as procedures on the lower abdomen, perineum, or lower limbs. Researchers conducted short-term RCTs, often comparing this formulation against other regional anesthetics or different dosages, to assess its role in examining outcomes related to physical discomfort and motor block required for the operation.

Research describes that studies monitored patterns of surgical-level sensory block and skeletal muscle relaxation following administration in the observed populations. Studies also reported measurements for the timing of the anesthetic effects, including how quickly the numbness began and the overall duration of the sensory block measured in patients during the procedures.


Research Focus on Block Characteristics and Recovery

Clinical studies explored detailed metrics related to the characteristics of the nerve block achieved. This research examined factors like the degree and height of the sensory block—that is, how far up the body the numbness extended—and the time until the motor block fully resolved, allowing the patient to regain full sensation and movement in the lower body.

Subgroup Analysis: Obstetric Surgical Procedures

The evidence base specifically includes many focused studies on pregnant women undergoing cesarean delivery, a major surgical procedure. This was evaluated in trials to ensure that block characteristics were monitored for the mother while also monitoring neonatal outcomes, such as the baby's Apgar score, immediately following delivery.


Understanding Uncertainty and Evidence Gaps

The available evidence is limited in certain areas, and certainty remains low for some very specific questions regarding Spino. For instance, the research is ongoing to determine the optimal dose range when the medicine was observed in combination with different adjuvants, as the specific dose was observed to vary by procedure and patient. Furthermore, comparative evidence is lacking in some areas to definitively confirm whether specific advantages exist for the hyperbaric formulation over the isobaric one for general block failure rates. These findings describe group patterns, not personal outcomes, and they highlight where the research provides insight into short-term changes but not individual predictions.

Key Studies & References

  1. DailyMed: Bupivacaine Hydrochloride in Dextrose Injection, USP (Product Monograph)

Frequently Asked Questions (FAQ)

Common questions about Spino (FAQ)

Q: What conditions is Spino officially indicated to treat?

Official product information describes Spino as being indicated for use in subarachnoid (spinal) blocks. This method of delivery is used to produce local or regional anesthesia and analgesia. It is used to facilitate certain surgical procedures, such as those involving the urological, lower limb, or lower abdominal areas.

Q: Is Spino considered a long-term or short-term treatment option?

Spino is classified as a short-term use medicine. According to regulatory documents, this medicine is intended for use as a single-dose injection administered once for a specific procedure. It is not approved or intended for repeated or continuous administration over an extended period of time.

Q: Is it common to experience weight changes while taking Spino?

Weight changes are not listed as a documented adverse reaction in the official safety information for this medicine. The regulatory safety profile focuses on effects observed acutely following the injection. Consultation with a healthcare provider is suggested if concerns about weight changes arise.

Q: Can Spino affect sleep patterns or cause insomnia?

Sleep pattern changes or insomnia are not listed as reported adverse reactions in the official safety information for this medicine. The side effect profile primarily details acute effects on the cardiovascular and nervous systems that occur immediately following administration.

Q: Is it normal to feel dizzy or lightheaded when first starting Spino?

The regulatory documentation describes light-headedness and dizziness as documented signs. These symptoms may indicate potential initial systemic exposure or Central Nervous System (CNS) toxicity if the medicine spreads too far. They are not explicitly listed as common or very common side effects in the official safety profile.

Q: Are there common foods or drinks that interact with Spino?

Official product information for Spino does not contain specific warnings or instructions regarding interactions with common foods or drinks. The regulatory interaction profile primarily focuses on co-administration with other medicines, such as local anesthetics and anti-arrhythmic agents.

Q: Can Spino be taken with vitamins or herbal supplements?

The official product information for Spino does not contain specific warnings or instructions regarding interactions with herbal supplements or vitamins. The primary safety concerns revolve around additive toxic effects with other prescription medicines.

Q: What does the official label say about using Spino during pregnancy or breastfeeding?

Spino is described as recommended for use in spinal anesthesia during labor and delivery, and studies have examined neonatal outcomes. Furthermore, official information indicates that only low levels of the active agent are found in breast milk, and adverse effects in breastfed infants have not been reported in regulatory documentation.

Q: How long does it usually take before I notice the expected effects of Spino?

The onset of the sensory blockade following the spinal injection is typically very rapid. Official studies indicate that the numbness may begin within one minute of administration.

Q: How quickly do the effects of Spino wear off after stopping the treatment?

The effects are temporary and wear off after a period of hours. Official studies indicate that the duration of sensory blockade typically lasts around 2 hours. The time required for complete recovery of motor ability typically lasts around 3.5 hours following the single injection.

Q: Is it safe to crush or chew Spino tablets?

Spino is not manufactured as a tablet or capsule. The medicine is supplied exclusively as a sterile solution intended only for intrathecal injection (spinal injection). This means it is delivered directly into the subarachnoid space.

Q: What were the primary outcomes of the main clinical trials for Spino?

Clinical trials were designed to monitor outcomes related to the nerve block's characteristics. These outcomes included the speed of onset, the overall duration and height of the sensory block, and the extent and time required for the patient's recovery of muscle relaxation.

Q: How was the effectiveness of Spino measured in the research?

Researchers measured the medicine's effectiveness by monitoring specific metrics. This involved tracking patterns of surgical-level sensory block, the degree of skeletal muscle relaxation achieved, and the precise timing of the anesthetic effects during the procedure.

Q: What is the published evidence theme regarding Spino’s mechanism of action?

The central evidence theme is the selective interruption of nerve impulses. This is achieved by the active agent binding to and blocking specialized ion channels (Voltage-Gated Sodium Channels) within nerve membranes, which prevents the transmission of signals.

Q: Is the dosage always the same for every patient?

No, the official label mandates that dosing must be precisely regulated and tailored by the specialist to the specific surgical procedure being performed. Furthermore, dose reductions are required for certain patient populations, such as older or acutely ill patients.

Q: What are the risks of taking Spino for too long?

Spino is only authorized for single-dose use. The regulatory safety data warns that the injection of repeated doses may cause significant increases in the active agent’s plasma levels due to slow accumulation. This increases the risk of systemic toxic effects.

Q: Are there different available forms (such as tablets or liquids) of Spino?

The official product information specifies that the only available form is a sterile hyperbaric solution. This solution is designed exclusively for intrathecal (spinal) injection and is not manufactured in any other form, such as tablets, capsules, or oral liquids.

Q: Does Spino treat the underlying cause or the symptoms of the illness?

Spino is classified as a local anesthetic, and its function is to provide regional anesthesia. It works by temporarily blocking nerve impulses, which relieves symptoms like pain and sensation, but it does not address the underlying cause of the condition that requires surgery.

Q: Is Spino classified as a controlled substance?

No. According to regulatory classifications in the United States, Spino is not scheduled as a controlled substance by the Drug Enforcement Administration. It is, however, a prescription-only medicine.

Q: Are there any known long-term safety concerns with continued Spino use?

While the medicine is for single-dose use, the official safety profile reports concerns related to long-term exposure to the active agent. Serious cases of drug-induced liver injury, hepatic failure, and increased hepatic enzymes have been reported following repeated injections or long-term infusions.

Q: Does Spino have a risk of dependence or tolerance?

The official label notes that tolerance to elevated blood levels of the active agent can occur in patients receiving repeated doses. The product is not a controlled substance, and dependence is not mentioned in the official safety profile for its approved use.

Q: What happens if Spino is taken with alcohol?

Official product information for Spino does not contain explicit warnings or instructions regarding interactions with alcohol. The regulatory focus is on minimizing the risk of additive toxicity when used concurrently with other medications.

Q: Does Spino need to be taken at a specific time of day to be effective?

No. This medicine is administered as a single injection by a specialist directly into the spinal column. It is given at the time of a necessary surgical or diagnostic procedure, regardless of the time of day.

Q: What does the official information recommend if I miss a dose of Spino?

As Spino is a single-dose medicine administered only for a specific procedure, the concept of a scheduled or missed dose does not apply to its use.

Q: What is the usual treatment duration or typical course for Spino?

Spino is designed for single-dose administration only. Therefore, the typical course of treatment is limited to the duration of the anesthetic effect provided by that single injection.

Q: Does Spino lose effectiveness (tolerance) over an extended period?

Spino is a single-dose treatment. If a patient were to receive repeated doses, the official label notes that tolerance to elevated blood levels of the active agent may occur. This reduced tolerance could potentially affect effectiveness.

Q: Is Spino available as a generic medicine?

Yes. According to regulatory records, Bupivacaine in Dextrose Injection is available as a generic equivalent to the branded product, which contains the same active ingredients.

Q: Where can I find the official package insert or drug label for Spino?

The official package insert or drug label can be found on government-operated regulatory websites. These sources include DailyMed (from the FDA), the Summary of Product Characteristics (EMA), or the Health Canada Product Monograph.

Q: Were the Spino studies conducted on diverse patient populations?

The evidence base includes focused studies on key populations. Researchers have examined use in pregnant women undergoing cesarean delivery, and specific dosing recommendations exist for various pediatric and older adult patient groups.

Q: Why is Spino not available over-the-counter?

The medicine is restricted to prescription use due to its complexity and risk profile. It requires specialized administration as an intrathecal injection by a qualified healthcare professional and carries a risk of serious complications if not used properly.

Q: How does Spino interact with driving or operating heavy machinery?

The product information advises that caution should be exercised when driving or operating a vehicle or potentially dangerous machinery following administration. This caution is related to the temporary nature of the anesthetic effects.

Q: Does Spino require any special medical monitoring (like regular blood tests)?

Following the injection, healthcare professionals typically monitor the patient's cardiovascular and respiratory vital signs and state of consciousness. This monitoring helps ensure patient safety during the immediate post-injection period.

Q: Does Spino cause withdrawal symptoms when treatment is ended?

The active agent in Spino is a local anesthetic. Based on its pharmacological class, withdrawal symptoms associated with its intended use are not listed in the official safety information.

How should Spino be stored and disposed of?

Spino (Bupivacaine/Dextrose Injection) must be stored at Controlled Room Temperature, defined as 20 C to 25 C (68 F to 77 F), with excursions permitted up to 30 C. The product must not be frozen and should be protected from light and heat. Prior to use, the solution must be clear and colorless; any discolored solution or one containing particulate matter must not be administered. Since Spino is a single-dose sterile solution, any unused portion must be discarded immediately after the container is opened, as it contains no preservatives. For disposal, unused or expired medicine and waste materials must be handled in accordance with local regulations for pharmaceutical waste, and should not be placed in household trash or down the drain. As with all prescription medications, Spino must be kept out of the sight and reach of children.

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

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