Sevredol

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Sevredol

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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 Sevredol

This foundational overview defines the identity, composition, and general purpose of the medicine Sevredol (Morphine Sulfate), strictly excluding dosage, usage instructions, specific indications, and safety information.

Property Description
Active Ingredient Morphine Sulfate
Form Oral Tablet, Immediate-Release (IR)
Pharmacological Class Opioid Analgesic, Narcotic Analgesic
General Purpose Potent pain management (rapid onset)
Origin Natural (Opium alkaloid) / Semi-synthetic salt

Identity, Classification, and the Active Ingredient

Sevredol is the registered trade name for a pharmaceutical product whose active ingredient is Morphine Sulfate. This substance is formally classified as a potent Opioid Analgesic and belongs to the broader group of narcotic analgesics. Morphine and its salts are clinically recognized for their ability to significantly modulate pain perception via central nervous system action. As a strong opioid, the substance primarily works by changing how the brain and nervous system respond to pain.

Composition, Formulation Type, and Origin

The preparation is a single-ingredient product, or monocomponent, with Morphine Sulfate as the sole active agent. Chemically, it is prepared as the sulfate salt of Morphine, which is itself an Opium alkaloid naturally derived from the poppy plant, classifying the drug as having a natural origin with semi-synthetic processing. Sevredol is exclusively an Oral Tablet that utilizes an Immediate-Release (IR) formulation. This specific design ensures that the active substance is absorbed quickly, allowing the potent effects of the Morphine Sulfate to be delivered rapidly, contrasting fundamentally with prolonged-release opioid formulations engineered for slow, sustained relief over extended periods.

What is the General Purpose of This Type of Drug?

The general purpose of an immediate-release strong opioid analgesic is to offer potent pain management when swift therapeutic intervention is required. The drug achieves its functional role by acting as a strong mu-opioid receptor agonist, which centrally disrupts the pain signals traveling to the brain. This mechanism provides swift and profound suppression of pain sensation, which is necessary when a fast onset of strong analgesic relief is indicated, for instance, in scenarios involving sudden, intense increases in pain.

What side effects are possible with Sevredol?

Possible Side Effects and Safety Information

Adverse reactions associated with morphine sulfate (Sevredol) are classified by regulatory authorities based on frequency and the affected body system. The most common or Very Common reactions typically involve the nervous and gastrointestinal systems, including sedation, drowsiness, nausea, vomiting, constipation, and itching (pruritus). Common effects may include headache, dizziness, urinary retention, and changes in heart rate or blood pressure, such as orthostatic hypotension.

Regulatory Safety Concerns

The official safety profile highlights several serious adverse reactions. The most critical risk is life-threatening respiratory depression, which is the leading cause of fatal outcomes with this class of medication and is often highest when treatment is initiated or a dose is increased. The regulatory labeling also carries warnings regarding the high potential for addiction, abuse, and misuse, as well as the risk of Severe Hypotension and adrenal insufficiency.

Classification System-Organ Classes Primarily Affected
Very Common Nervous system, Gastrointestinal, Respiratory
Common Nervous system, Cardiovascular, Renal/Urinary

Population- and Duration-Related Safety

Specific safety considerations are noted for certain populations. Elderly, cachectic, or debilitated patients are formally recognized as having an increased risk of respiratory depression. Patients with severe renal or hepatic impairment may experience the accumulation of drug metabolites. Furthermore, long-term use is associated with the development of drug tolerance and physical dependence, along with potential effects on the body's endocrine system.

Overdose and Emergency Response

Overdose and When to Seek Help

Sevredol (morphine sulfate) is an opioid medication, and taking too much can lead to a serious, potentially fatal, overdose. An opioid overdose is a medical emergency requiring immediate attention. The most significant danger of a Sevredol overdose is severe respiratory depression, which can cause breathing to slow significantly or stop completely.

Signs of Sevredol Overdose

Recognizing the symptoms of an overdose is crucial for a rapid response. The signs generally include:

Symptom Category Key Indicators
Breathing Extremely slow, shallow, or stopped breathing; choking or gurgling sounds (sometimes called a "death rattle").
Consciousness Inability to be awakened from sleep; unresponsiveness to voice or touch; stupor or coma.
Physical Pinpoint pupils; limp body; cold, clammy, or blue/gray skin (especially lips and nails); slow or weak pulse.

When to Seek Help

Call for emergency medical help immediately if you suspect an overdose, even if you are unsure. An overdose can be fatal if not treated quickly with the appropriate medication, such as naloxone, an opioid antagonist that can temporarily reverse the effects of the opioid. If naloxone is available, administer it as directed, but remember that its effects may wear off, so professional medical care is still mandatory. Always inform emergency personnel what was taken.

Therapeutic Uses of Sevredol

What Sevredol Treats: Main Uses and Benefits

The fundamental purpose of Sevredol is to provide supportive symptomatic relief for pain in clinical situations where immediate assistance is appropriate. Its use is generally guided by the intensity and pattern of symptoms it is applied in addressing. Morphine is used to relieve severe pain.

The medication is commonly used across domains where additional symptomatic support is needed, addressing conditions characterized by episodic or fluctuating manifestations, such as Breakthrough Pain (BTP) flares in chronic pain patients, or severe pain experienced following major surgery (postoperative care) and trauma.


Managing Severe Acute Pain Episodes

Sevredol is applied in contexts requiring urgent symptomatic assistance for severe pain. This therapeutic domain involves providing support that helps ease the overall symptom burden, assisting with maintaining comfort during phases of heightened patient distress. This includes scenarios where symptoms interfere with daily functioning and require short-term symptomatic assistance.

“It is commonly used when symptoms intensify and supportive relief is needed.”


Controlling Breakthrough Pain (BTP) Flares

It is considered relevant for managing Breakthrough Pain (BTP), which refers to the intense, episodic spikes of pain that may occur unpredictably in patients whose baseline chronic pain is otherwise stable. Used for managing these disruptive symptom manifestations, the medication offers symptomatic relief that helps patients cope more steadily with difficult episodes and contributes to easing the overall symptom load, supporting the patient during difficult episodes by easing distress.

Quick Fact: Relief for Severe Pain
Sevredol is considered relevant for managing severe acute pain and episodic flares where short-term symptomatic assistance is needed.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Population Eligibility for Sevredol

Official regulatory documents define strict criteria for who can and cannot use Sevredol (Morphine Sulfate). Use is contraindicated and must be avoided in patients with conditions that pose an acute risk, including significant respiratory depression, known or suspected gastrointestinal obstruction (such as paralytic ileus), and acute or severe bronchial asthma. Furthermore, the medicine must not be used concurrently with, or within 14 days of discontinuing, a Monoamine Oxidase Inhibitor (MAOI).

Population Group Eligibility Status
Pediatric Patients Not recommended for children below three years of age.
Pregnancy/Lactation Use is not recommended during pregnancy or while breastfeeding.
Severe Organ Impairment Use requires caution in patients with severely impaired renal or hepatic function.

Use is restricted in individuals with severe chronic obstructive pulmonary disease (COPD) or acute hepatic disease. The FDA and other national authorities also require caution when using this medicine in elderly patients and in those with pre-existing conditions such as increased intracranial pressure, brain tumors, or a history of substance abuse. The medicine is primarily intended for use in adults and in children who meet the minimum age and weight thresholds defined in the labeling.

What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

Interactions with Sevredol (morphine sulfate immediate release) are primarily defined by additive effects and are strictly documented in official regulatory labeling to ensure safe use.


Pharmacodynamic Interactions

Interaction Type Interacting Product Categories Regulatory Constraint
Additive CNS Depression Benzodiazepines, other opioids, alcohol, sedatives, hypnotics, tranquilizers, general anesthetics, phenothiazines May result in profound sedation, respiratory depression, coma, and death. Use requires extreme caution.
Serotonergic Risk SSRIs, SNRIs, triptans Documented increased risk of Serotonin Syndrome.
Opioid Receptor Antagonism Mixed agonist/antagonist opioids (e.g., pentazocine, nalbuphine) May reduce the analgesic effect or precipitate withdrawal symptoms.

Contraindicated and Time-Separated Interactions

The co-administration of Sevredol with Monoamine Oxidase Inhibitors (MAOIs) is strictly forbidden. A clear time-based restriction applies: Sevredol must not be administered during or within 14 days following the discontinuation of therapy with any MAOI.

Other Documented Interactions

Concomitant use with Anticholinergics is officially noted to increase the risk of adverse effects such as urinary retention and severe constipation, which may lead to paralytic ileus. The risk of these documented interactions may be greater in certain groups, such as the elderly, cachectic, or debilitated patients, due to heightened sensitivity to CNS depressant effects.

Mechanism of Action

Direct Agonism at the Central mu-Opioid Receptor

Sevredol (Morphine Sulfate) exerts its effects by acting as a full agonist at the mu (Mu) Opioid Receptor (mu-OR), a G-protein coupled receptor found throughout the brain and spinal cord. This binding initiates an inhibitory cascade within the central nervous system (CNS), serving to directly suppress the activity of neurons that transmit nociceptive signals.


Suppression of Nociceptive Signaling and Neuronal Excitability

The activation of mu-OR modulates ion channels, causing nerve cells to become less excitable through hyperpolarization while simultaneously reducing the release of excitatory neurotransmitters (like Substance P). This dual action effectively interrupts the communication of nociceptive signals traveling up the spinal cord, leading to the overall physiological change of altered perception and transmission of nociceptive signals.


Modulation of Autonomic Control Centers

Beyond the nociceptive pathway, the widespread distribution of the mu-OR causes the drug's mechanism to affect involuntary physiological processes regulated by the brainstem. This activity results in mu-OR-mediated modulation of respiratory center responsiveness and a decrease in gastrointestinal smooth muscle activity, leading to reduced peristalsis. The profile is driven by central neuronal inhibition.

Dosage and Administration Information

Official Administration Guidelines

Sevredol is an oral medication, meaning it is administered exclusively by swallowing the tablet whole. The tablets are film-coated and must not be crushed, chewed, or dissolved, as this risks a rapid release of the active ingredient.

Feature Official Usage Guideline
Route & Preparation Oral intake; tablets must be swallowed whole. Scored tablets can be divided into equal halves for adjustment purposes.
Standard Frequency Dosed every four hours (q4h), used either as needed for acute pain or as part of a scheduled regimen.
Starting Dose The initial dose for an opioid-naïve adult typically begins at 10 mg, 15 mg, or 30 mg, depending on the region and patient assessment.

The principle of usage is anchored in individualized dose titration. The dose is adjusted every four hours based on patient response, following the rule that the lowest effective dose should be used, with no fixed ceiling established in the prescribing information.

Population-Specific Adjustments: A reduced initial dose is required for patients with impaired hepatic or renal function, as well as for older adults, due to altered clearance.

Discontinuation Protocol: This medication must not be stopped abruptly after prolonged use. To prevent physical withdrawal, the dose must be slowly and gradually tapered according to a prescribed reduction schedule.

Recent Clinical Evidence

Research evidence / Overview of studies for Sevredol

Evidence for Use in Managing Breakthrough Pain Flares

The research exploring this medicine, as studied for Breakthrough Pain (BTP) flares, involves studies conducted during periods of increased symptom activity for conditions characterized by fluctuating or episodic manifestations. These typically include short-term Randomized Controlled Trials (RCTs) and systematic reviews. Research explored outcomes related to patient-reported outcomes describing perceived discomfort, specifically focusing on how quickly patients reported a change in symptom intensity following administration in the research setting. These studies primarily included adults who were already receiving stable pain medication, particularly those with cancer-related pain.

Studies report how symptoms evolved in the observed populations by tracking changes in pain scores over defined time intervals. Some findings describe patterns of symptom change that were measured over short time intervals. However, evidence quality varies across studies, with some systematic reviews highlighting that many older, individual trials used small numbers of participants, which can limit the certainty of the pooled findings. Long-term effects are not fully established, as follow-up durations were limited.


Evidence for Use in Severe Acute Pain Episodes

This block outlines the research base for the medication as studied in acute clinical settings, such as following surgery (postoperative care) or trauma, detailing the types of randomized studies and guidelines that inform its evaluation for swift symptom management. The medication was evaluated in controlled RCTs for scenarios involving acute or disruptive episodes, and evidence related to the medication is documented in clinical practice guidelines. Research explored outcomes related to physical discomfort, primarily focusing on reduction in pain severity at specific time intervals.

Studies reported that assessments of pain relief measurements following the oral immediate-release route differed from those following intravenous administration. Findings indicate that the immediate-release oral formulations are referenced in clinical guidelines that address acute pain, with a specific focus on immediate symptom changes.


Study Durations and Follow-up Assessments

Follow-up durations were limited, often covering only the immediate response to a single dose of medication over a matter of hours. For acute pain management, studies observing responses over defined time intervals were also largely short-term, typically ranging up to 48 hours. Overall, there is limited information for long-term outcomes or how patterns of symptom change are maintained beyond the immediate study periods.


Key Research Gaps and Uncertainties

Evidence quality varies across studies, with many of the underlying trials having modest sample sizes. This means the results apply only to the populations studied and may not offer full certainty across all possible scenarios. Furthermore, comparative evidence is lacking when comparing immediate-release oral morphine against all newer analgesic options.

Key Studies & References

  1. Morphine Sulfate (Immediate Release) Oral Tablet - Official FDA Drug Label and Information
  2. Opioids in palliative care: guidance from the National Institute for Health and Care Excellence (NICE) [NG136]

Frequently Asked Questions (FAQ)

Common questions about Sevredol (FAQ)


Q: What is the main difference between Sevredol and other opioid pain medications?

As an immediate-release (IR) formulation, Sevredol is chemically engineered for rapid dissolution and swift absorption into the body. This feature fundamentally contrasts with modified-release tablets, which are formulated to release the active substance slowly over an extended period for sustained relief.


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

Pharmacokinetic studies—which examine how a drug moves through the body—provide an estimated time frame for its initial action. Official data indicates that the time to reach maximum concentration in the blood (Tmax) for this immediate-release formulation is typically observed to be approximately 45 to 75 minutes after the tablet is swallowed.


Q: Is it true that Sevredol can cause changes in mood?

Regulatory documents note that the active ingredient, morphine, works by affecting the central nervous system. As a result, neurological effects are documented. These may include general changes in mood, a sense of well-being (sometimes referred to as euphoria), or, in some cases, feelings of confusion or nervousness.


Q: Are there foods or drinks that should be avoided while taking Sevredol?

Official regulatory documents list specific, serious pharmacological interactions with certain medicines and alcohol. However, the product information states that Sevredol tablets may be taken with or without food, and generally does not specify the avoidance of non-alcoholic food items.


Q: What happens if someone accidentally takes too much Sevredol?

Taking more than the prescribed amount can lead to life-threatening symptoms, which is a major regulatory warning. Signs of an overdose may include extreme drowsiness, severe trouble breathing, pin-point pupils, and unresponsiveness leading to coma or death. Regulatory documents emphasize that immediate emergency medical attention may be necessary if an accidental overdose is suspected.


Q: Does Sevredol show up on common drug screening tests?

Sevredol’s active ingredient is morphine, which is classified as an opioid analgesic. Because of its chemical identity, the presence of morphine or its breakdown products (metabolites) in the body may be detected by standard drug screening tests designed to identify this class of medication.


Q: Is Sevredol used in palliative care?

Sevredol is referenced in clinical guidelines as a strong immediate-release opioid analgesic. It is commonly described for use in the management of severe pain, including in palliative care settings.


Q: Have there been recent studies about the use of Sevredol?

Regulatory authorities continually monitor and review the safety and efficacy profiles of all medicines. Official documents show that recent safety updates have been made to Sevredol’s labeling to reflect ongoing safety discussions, including warnings related to specific risks such as sleep-related breathing disorders.


Q: Can Sevredol affect my ability to drive or operate machinery?

Regulatory documents contain a warning that, due to side effects such as drowsiness, dizziness, and decreased alertness (CNS depression), this medication is documented to significantly impair a person’s ability to drive or operate machinery.


Q: What is the recommended approach if a dose of Sevredol is missed?

Official patient information describes general actions for a missed dose. These instructions typically state to take the dose if it is remembered soon after the scheduled time, but caution against taking a double dose if the next scheduled time is near.


Q: Are there different names or brands for the medicine Sevredol?

Sevredol is one registered brand name for the active pharmaceutical ingredient, morphine sulfate. This same active ingredient is widely available and is also sold under other brand names and as generic morphine sulfate immediate-release tablets.


Q: Does Sevredol affect sleep patterns?

Regulatory documents explicitly note that Sevredol can cause or worsen sleep-related breathing disorders. This includes central sleep apnoea (pauses in breathing during sleep) and a decrease in blood oxygen levels during sleep (hypoxemia).


Q: Does taking Sevredol affect appetite?

Loss of appetite, formally referred to as anorexia, is listed in regulatory documentation as a possible adverse reaction associated with the use of morphine sulfate.


How should Sevredol be stored and disposed of?

How to Store and Dispose of Sevredol?

Official Storage Requirements

Sevredol (morphine sulfate) tablets must be stored under specific regulatory conditions to maintain stability and potency. The required storage temperature is below 30 C (86 F). The medication must be kept in the original container and protected from light and moisture to ensure its labeled three-year shelf-life is maintained.

Mandatory Security and Disposal

As a potent opioid, the tablets must be kept out of the sight and reach of children to prevent accidental ingestion, which can be fatal. For disposal of unused or expired tablets, official guidance prioritizes using a drug take-back program. If a take-back program is unavailable, some regulatory agencies recommend flushing the tablets down the toilet immediately, while others advise mixing them with an undesirable substance before discarding them in household trash.

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

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