| FIELD OF APPLICATION | DETAILS |
|---|---|
| Generic Name | Remifentanil hydrochloride |
| Active Ingredient | Remifentanil hydrochloride |
| US Brand Names | Ultiva |
| Drug Category | Anesthesiology / Critical Care Medicine / Emergency Medicine |
| Drug Class | Ultra-Short-Acting Synthetic Opioid Analgesic (Mu-Opioid Receptor Agonist / Schedule II Controlled Substance) |
| Route of Administration | Intravenous Injection, Intravenous Infusion |
| FDA Approval Status | FDA approved (July 1996) Approved |
Remifentanil Hydrochloride Overview
Remifentanil hydrochloride is a potent prescription opioid medication used in operating rooms and intensive care units within our Clinic (General Medicine). It is designed for intravenous administration to provide pain relief and sedation during surgical procedures and short-term critical care.
What Is Remifentanil Hydrochloride & How Does It Work?
Remifentanil hydrochloride is an ultra short acting synthetic opioid that acts directly on the central nervous system to block pain signals.
It works by binding selectively to mu-opioid receptors in the brain and spinal cord. When these receptors are activated, they stop pain nerves from transmitting signals to the brain. What makes remifentanil unique compared to other opioids is its rapid breakdown in the body. Blood and tissue enzymes called non-specific esterases quickly hydrolyze the drug, allowing its pain-relieving effects to start within 1 to 3 minutes and dissipate completely within 5 to 10 minutes after stopping the continuous drip.
Is Remifentanil Hydrochloride FDA Approved?
Yes, remifentanil hydrochloride is officially approved by the United States Food and Drug Administration.
What Is Remifentanil Hydrochloride Used For?
- Analgesic agent for use during the induction and maintenance of general anesthesia for inpatient and outpatient surgical procedures.
- Continuation as an analgesic into the immediate postoperative recovery period under qualified medical supervision.
- Providing analgesia and sedation in mechanically ventilated intensive care unit (ICU) adult patients.
Before Taking Remifentanil Hydrochloride: Contraindications & Precautions
Because remifentanil is an extremely potent opioid, healthcare providers perform strict safety checks before its administration.
Who Should Not Receive Remifentanil Hydrochloride?
- Patients with a known severe hypersensitivity or allergic reaction to remifentanil or other fentanyl analogs.
- Administration via epidural or intrathecal routes is strictly contraindicated, as the formulation contains glycine, which can cause spinal toxicity.
- Sole use as an induction agent in general anesthesia when fast-acting muscle control is not established.
Remifentanil Hydrochloride, Pregnancy & Fertility
- Remifentanil crosses the placenta and can cause respiratory depression in newborn infants if administered during labor and delivery. It is used during pregnancy only if the potential benefit justifies the potential risk.
- It is not known whether remifentanil passes into human breast milk. Nursing mothers are typically advised to exercise caution and consult their care team regarding breastfeeding timing after surgery.
- Studies have not shown direct evidence of impaired human fertility at therapeutic doses.
Tell Your Doctor Before Receiving Remifentanil Hydrochloride
- Disclose if you or your family member has a history of severe respiratory disorders, such as asthma or chronic obstructive pulmonary disease (COPD).
- Mention if you have a history of heart rate abnormalities, especially slow heart rate (bradycardia).
- Inform your provider if you have a history of severe muscle rigidity or adverse reactions to anesthesia.
- Share a list of all current medications, especially central nervous system depressants, sedatives, or blood pressure drugs.
Remifentanil Hydrochloride Dosage & Administration
Remifentanil hydrochloride is administered strictly by trained anesthesia professionals or critical care physicians using specialized equipment.
Standard Remifentanil Hydrochloride Dosing
- Dosing is strictly calculated based on ideal body weight and tailored continuously to the patient’s age, physical status, and surgical stimulus.
- For maintenance of general anesthesia, continuous IV infusion rates typically range from 0.1 to 0.5 micrograms per kilogram per minute.
- Supplemental IV bolus doses may be given during surgery to manage sudden painful stimuli.
How Remifentanil Hydrochloride Is Administered
- The drug is supplied as a sterile powder, reconstituted, and diluted into an intravenous solution.
- It is infused using dedicated electronic infusion pumps directly into a flowing IV line to ensure steady, controlled delivery.
- Continuous visual, cardiac, and respiratory monitoring equipment must be connected to the patient throughout administration.
Remifentanil Hydrochloride Clinical Efficacy & Research
Clinical trials confirm that remifentanil hydrochloride provides rapid, predictable, and easily titratable pain relief during surgical procedures. Because of its rapid metabolism by tissue esterases, recovery times are significantly shorter and more consistent compared to longer-acting opioids like morphine or fentanyl. Research shows that patients clear the drug quickly regardless of the duration of the infusion or the presence of kidney or liver impairment.
Remifentanil Hydrochloride Side Effects & Safety Profile
Remifentanil hydrochloride carries significant risks of life-threatening respiratory depression, severe muscle rigidity (including chest wall rigidity), profound hypotension, and bradycardia. It must be administered only by healthcare professionals trained in general anesthesia and airway management in a setting equipped with full resuscitation equipment and continuous hemodynamic and respiratory monitoring.
Due to its high potency, remifentanil causes rapid physiological changes that require active management by the anesthesia team.
Remifentanil Hydrochloride Severe Warnings
Remifentanil can cause life-threatening respiratory depression and severe muscle rigidity, particularly in the chest wall (known as wooden chest syndrome). Muscle rigidity can make manual ventilation impossible if not treated immediately with neuromuscular blocking agents. It can also cause severe drops in blood pressure (hypotension) and abnormally slow heart rates (bradycardia).
Remifentanil Hydrochloride Common Side Effects
- Nausea and vomiting during postoperative recovery.
- Temporary low blood pressure.
- Mild slowing of the heart rate.
- Postoperative shivering or chills.
Serious Remifentanil Hydrochloride Adverse Events
- Severe respiratory depression, chest wall rigidity, or complete stopping of breathing (apnea).
- Severe bradycardia, heart block, or cardiovascular collapse.
- Severe hypotension leading to inadequate organ perfusion.
- Opioid-induced hyperalgesia (increased sensitivity to pain immediately after stopping the infusion).
Managing Remifentanil Hydrochloride Side Effects
Because this drug is given only in monitored surgical settings, side effects are managed in real time. Slow heart rates are treated with medications like atropine. Low blood pressure is managed with IV fluids or vasopressors. Respiratory depression is controlled through mechanical ventilation, and opioid reversal agents like naloxone are kept immediately available.
Interactions & What to Avoid
Combining remifentanil with other sedating drugs intensifies its effects on the brain and heart.
Remifentanil Hydrochloride Interactions
- Inhaled anesthetics, sedatives, tranquilizers, and other opioids increase the hypnotic and respiratory depressant effects of remifentanil.
- Medicines that slow the heart rate (such as beta-blockers or calcium channel blockers) increase the risk of severe bradycardia when given with remifentanil.
- Monoamine oxidase inhibitors (MAOIs) can enhance opioid side effects and should be evaluated prior to elective surgery.
Food & Alcohol
- Patients must follow strict pre-surgery fasting guidelines (nothing by mouth) provided by their surgical team.
- Alcohol consumption before or immediately following procedures involving remifentanil significantly increases the risk of severe respiratory depression and deep sedation.
Remifentanil Hydrochloride Missed Dose, Overdose & Storage
Strict hospital protocols govern the handling, dosing, and disposal of this controlled substance.
Missed Dose of Remifentanil Hydrochloride
Remifentanil is given as a continuous infusion or controlled bolus by healthcare providers during surgery, so missed dose scenarios do not occur.
Remifentanil Hydrochloride Overdose & Emergency
An overdose leads to chest wall rigidity, severe loss of blood pressure, slow heart rate, and respiratory arrest. Anesthesia personnel handle overdoses instantly by stopping the infusion, supporting ventilation with oxygen, giving muscle relaxants if needed, and administering IV naloxone to reverse the opioid effect.
How to Store Remifentanil Hydrochloride
Unopened vials of the powder are stored at controlled room temperature between 2°C and 25°C (36°F and 77°F). Once reconstituted, the solution is stable for up to 24 hours at room temperature and must be discarded if unused after that time.
Remifentanil Hydrochloride Patient Management & Monitoring
Patients receiving remifentanil are under uninterrupted professional medical surveillance.
Tests Before Starting Remifentanil Hydrochloride
- Baseline evaluation of airway status, lung function, and cardiovascular stability.
- Assessment of baseline vital signs (blood pressure, heart rate, oxygen saturation).
Monitoring During Remifentanil Hydrochloride Routine
- Continuous electrocardiogram (ECG) tracking and heart rate monitoring.
- Continuous blood pressure and pulse oximetry monitoring.
- Continuous monitoring of exhaled carbon dioxide (capnography) and breathing effort.
- Monitoring for immediate post-operative pain, as remifentanil wears off within minutes and longer-acting pain relievers must be started early.
Remifentanil Hydrochloride Do’s and Don’ts
- Do inform your anesthesia team about all past reactions to pain medications or anesthesia.
- Do follow all post-operative care instructions, including transition to oral or standard IV pain medications.
- Don’t attempt to stand or walk without assistance immediately after waking up from surgery.
- Don’t drive, operate machinery, or consume alcohol for at least 24 hours after receiving surgical anesthesia.
Frequently Asked Questions
Why is remifentanil used instead of other opioids during surgery?
Remifentanil acts very quickly and breaks down in the body within minutes after stopping the IV drip. This allows anesthesiologists to precisely control pain levels during surgery and helps patients wake up faster once the procedure is finished.
Does remifentanil stay in your system after surgery?
No. Unlike longer-acting opioids that can linger in your body for hours, remifentanil is rapidly broken down by enzymes in your blood and tissues. Its effects fade almost completely within 5 to 10 minutes of stopping the infusion.
Will I feel pain immediately after waking up from remifentanil?
Because remifentanil clears from your body so quickly, your surgical team will start a longer-acting pain medication (such as morphine, hydromorphone, or non-opioid pain relievers) before stopping the remifentanil infusion so you stay comfortable.
Can remifentanil cause muscle stiffness?
Yes. Rapid injection of high doses of remifentanil can cause temporary stiffness in the chest muscles, known as wooden chest syndrome. Anesthesiologists prevent or manage this by injecting the drug slowly and using muscle-relaxing medications when necessary.
Is remifentanil safe for patients with kidney or liver disease?
Yes. Because remifentanil is broken down by blood and tissue enzymes rather than being processed primarily by the liver or kidneys, its rapid clearance rate remains largely the same even in patients with liver or kidney impairment.
Can remifentanil be given as an epidural for labor?
No. Remifentanil injectable formulation contains an amino acid called glycine as a buffer. Injecting glycine into the spinal space or epidural area can cause nerve damage, so remifentanil must only be given intravenously.
Will I be awake while receiving remifentanil?
During surgery, remifentanil is given alongside anesthetic medications that keep you fully asleep. In critical care settings, it may be used at lower doses to keep ventilated patients calm, comfortable, and resting comfortably.
References
- U.S. FDA – Ultiva (remifentanil hydrochloride) prescribing information
- U.S. FDA Drugs@FDA – Drug approval overview
- National Library of Medicine (NIH) PubChem – Remifentanil Hydrochloride Summary
Legal Disclaimer
The information provided is for educational and informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider at any hospital or any local clinic before starting or stopping any medication.
