Efavirenz and Fentanyl drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Efavirenz (efavirenz) and Fentanyl (fentanyl citrate). Common drug interactions include abdominal distension among females and arthralgia among males.

The phase IV clinical study analyzes what interactions people have when they take Efavirenz and Fentanyl. It is created by eHealthMe based on reports of 19 people who take the same drugs from the FDA, and is updated regularly.

What is Efavirenz?

Efavirenz has active ingredients of efavirenz. It is often used in hiv infection. eHealthMe is studying from 15,501 Efavirenz users. Check the latest studies of Efavirenz.

What is Fentanyl?

Fentanyl has active ingredients of fentanyl citrate. It is often used in pain. eHealthMe is studying from 73,301 Fentanyl users. Check the latest studies of Fentanyl.

On Jul, 06, 2026

19 people who take Efavirenz and Fentanyl together, and have interactions are studied.

Efavirenz and Fentanyl drug interactions.

What are the common drug interactions of Efavirenz and Fentanyl, by gender? *:

female:

Abdominal distension
Abdominal mass (localized enlargement or swelling in the human abdomen)
Abdominal pain
Adult respiratory distress syndrome (type of lung (pulmonary) failure)
Anaemia (lack of blood)
Anorexia (eating disorder characterized by immoderate food restriction and irrational fear of gaining weight)
Atelectasis (partial or complete collapse of the lung)
Bartonellosis (infectious disease produced by bacteria of the genus bartonella)
Blood albumin decreased
Blood bicarbonate decreased

male:

Arthralgia (joint pain)
Influenza like illness
Hypoxia (low oxygen in tissues)
Nausea (feeling of having an urge to vomit)
Pneumonia aspiration (bronchopneumonia that develops due to the entrance of foreign materials into the bronchial tree)
Diarrhoea
Drug hypersensitivity
Fall
Guillain barre syndrome (the body's immune system attacks its peripheral nervous system)
Guillain-barre syndrome (the body's immune system attacks its peripheral nervous system)

What are the common drug interactions of Efavirenz and Fentanyl, by age (0-1 to 60+)? *:

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

Abdominal distension
Abdominal mass (localized enlargement or swelling in the human abdomen)
Abdominal pain
Adult respiratory distress syndrome (type of lung (pulmonary) failure)
Anaemia (lack of blood)
Anorexia (eating disorder characterized by immoderate food restriction and irrational fear of gaining weight)
Atelectasis (partial or complete collapse of the lung)
Bartonellosis (infectious disease produced by bacteria of the genus bartonella)
Blood albumin decreased
Blood bicarbonate decreased

30-39:

Arthralgia (joint pain)
Influenza like illness
Myalgia (muscle pain)
Pyrexia (fever)
Rhinorrhoea (watery mucus discharge from the nose)
Appetite decreased (decreased appetite occurs when you have a reduced desire to eat)
Viral infection
Hypersensitivity
Pruritus (severe itching of the skin)
Nausea (feeling of having an urge to vomit)

40-49:

Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Carcinoma (cancer)
Hoarseness (changing voice)
Insomnia (sleeplessness)
Loss of consciousness
Respiratory arrest (cessation of normal respiration due to failure of the lungs to function effectively)
Somnolence (a state of near-sleep, a strong desire for sleep)

50-59:

Guillain-barre syndrome (the body's immune system attacks its peripheral nervous system)
Respiratory failure (inadequate gas exchange by the respiratory system)
Respiratory failure (excl neonatal) (inadequate gas exchange by the respiratory system(excluding neonatal))
Abdominal pain
Conjunctivitis (pink eye)
Drug hypersensitivity
Immune reconstitution syndrome (immune recovery syndrome)
Lobar pneumonia (a form of pneumonia that affects a large and continuous area of the lobe of a lung)
Neuromyopathy (disease of both muscles and nerves)
Pneumonia

60+:

Dermatitis exfoliative (widespread scaling of the skin, often with itching (pruritus), skin redness (erythroderma), and hair loss)
Faecaloma (hard mass of fecal matter)
Foetal exposure during pregnancy (exposing your unborn child to contraindicated in pregnancy leads birth defect)
Photosensitivity reaction
Rash erythematous (redness of the skin)

What are the existing conditions these people have? *

Pain In Extremity: 1 person, 5.26%
Micturition Urgency (urgency to pass the urine): 1 person, 5.26%
High Blood Pressure: 1 person, 5.26%
Gastritis (inflammation of stomach): 1 person, 5.26%
Epilepsy (common and diverse set of chronic neurological disorders characterized by seizures): 1 person, 5.26%
Enlarged Prostate: 1 person, 5.26%
Cytomegalovirus Infection: 1 person, 5.26%

* Approximation only. Some reports may have incomplete information.

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