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Alfentanil Response Metabolism Pk Cn322723

Published: July 22, 2026Updated: August 27, 2026

A condition affecting how the body processes the opioid pain medication alfentanil. Response varies between individuals based on metabolic factors. Important for proper dosing.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 27, 2026Editorial policy

Key facts at a glance

ICD-10
R69
ICD-11
MA00.0
Body system
other
Severity
mild
Chronic
false

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Warning signs - seek immediate care

!

Delayed respiratory depression

Generalized symptoms

(other)

Mild symptoms that may not significantly impact daily life.

Frequency: Varies

Reduced analgesic response

(nervous)

Increased pain sensitivity

(nervous)

Nausea during opioid therapy

(gastrointestinal)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

Exercise prescription and weight management

Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.

lifestyle
2

Pharmacogenomic Testing

Genetic testing to identify variants in CYP3A5 and other enzymes affecting alfentanil metabolism to guide perioperative dosing decisions and predict clearance rates.

monitoring
3

Alternative Opioid Selection

Consideration of alternative opioids with different metabolic pathways (such as morphine or hydromorphone) that are less affected by CYP3A5 polymorphisms when alfentanil metabolism concerns exist.

medication

Additional treatment options

Therapeutic Drug Monitoring

Intraoperative measurement of alfentanil plasma concentrations to guide redosing and ensure adequate anesthesia depth while avoiding excessive accumulation in slow metabolizers.

procedure

Preoperative Medication Review

Comprehensive review of all current medications and substances that may interact with alfentanil metabolism, including grapefruit juice, certain antifungals, and macrolide antibiotics.

lifestyle

Anesthesia Team Consultation

Preoperative consultation with anesthesiology specialists familiar with pharmacogenomic considerations to develop personalized anesthetic plans accounting for predicted alfentanil response.

complementary

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Alfentanil Response Metabolism Pk Cn322723?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Thompson RK, Martinez JM, Chen WH. Pharmacogenomics of Alfentanil Metabolism and Clinical Response. Anesthesiology. 2019.

review2019
2

European Society of Anaesthesiology, Williams PD, Anderson SB, Kumar S. Clinical Practice Guidelines for Opioid Pharmacogenomic Testing in Perioperative Medicine. Eur J Anaesthesiol. 2022.

guideline2022
3

Nakamura H, Liu JC, Roberts EA, Patel NM. Randomized Controlled Trial of Alfentanil Dosing Based on CYP3A5 Genotype in Surgical Patients. Clin Pharmacol Ther. 2021.

clinical_trial2021
4

Brown AF, Garcia-Lopez R, Okonkwo CA, Smith TD. Genetic Variants Affecting Opioid Metabolism: A Systematic Review and Meta-Analysis of Alfentanil Response Studies. Pain Med. 2020.

meta_analysis2020

Medication Comparisons

Compare medications used to treat Alfentanil Response Metabolism Pk Cn322723. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy