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

Summary:

Drug interactions are reported among people who take Fentanyl (fentanyl citrate) and Norfloxacin (norfloxacin). Common drug interactions include pneumonia bacterial among females and nausea among males.

The phase IV clinical study analyzes what interactions people have when they take Fentanyl and Norfloxacin. It is created by eHealthMe based on reports of 17 people who take the same drugs from the FDA, and is updated regularly.

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.

What is Norfloxacin?

Norfloxacin has active ingredients of norfloxacin. It is often used in urinary tract infection. eHealthMe is studying from 2,567 Norfloxacin users. Check the latest studies of Norfloxacin.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 20, 2026

17 people who take Fentanyl and Norfloxacin together, and have interactions are studied.

Fentanyl and Norfloxacin drug interactions.

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

female:

Pneumonia bacterial (pneumonia associated with bacterial infection)
Cystitis haemorrhagic (blood in the urine and painful voiding)
Arthralgia (joint pain)
Cataract (clouding of the lens inside the eye)
Confusional state
Contusion (a type of hematoma of tissue in which capillaries)
Decubitus ulcer (a chronic ulcer of the skin caused by prolonged pressure on it)
Disorientation (disability in which the senses of time, direction, and recognition of people and places)
Dizziness
Dysarthria (speech disorder)

male:

Nausea (feeling of having an urge to vomit)
Haemophilic arthropathy (permanent joint disease)
Ectopic acth syndrome (a type of cancer-usually associated with the lung)
General physical health deterioration (weak health status)
Hyperglycaemia (high blood sugar)
Hypokalaemia (low potassium)
Leukocytosis (increased white blood cells)
Leukopenia (less number of white blood cells in blood)
Metabolic alkalosis (too much bicarbonate in the blood)
Pneumonia klebsiella (pneumonia caused by bacteria klebsiella)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Haemophilic arthropathy (permanent joint disease)

40-49:

Pneumonia klebsiella (pneumonia caused by bacteria klebsiella)
Rash macular (small, flat red spots)

50-59:

n/a

60+:

Pneumonia bacterial (pneumonia associated with bacterial infection)
Nausea (feeling of having an urge to vomit)
Confusional state
Contusion (a type of hematoma of tissue in which capillaries)
Cushing's syndrome (obesity, a rounded face, increased fat)
Decubitus ulcer (a chronic ulcer of the skin caused by prolonged pressure on it)
Delirium (wild excitement)
Disorientation (disability in which the senses of time, direction, and recognition of people and places)
Dizziness
Dizziness (excl vertigo)

What are the existing conditions these people have? *

Nausea (feeling of having an urge to vomit): 4 people, 23.53%
Lung Cancer - Non-Small Cell (lung cancer): 4 people, 23.53%
Nausea And Vomiting: 2 people, 11.76%
Haemostasis (stopping of bleeding): 2 people, 11.76%
High Blood Pressure: 2 people, 11.76%
Depression: 2 people, 11.76%
Influenza Like Illness: 2 people, 11.76%
Diarrhea: 2 people, 11.76%
Gastrointestinal Mucosal Disorder (disorder of gastrointestinal lining mucous membranes): 2 people, 11.76%
Neuralgia (pain in one or more nerves): 2 people, 11.76%

* Approximation only. Some reports may have incomplete information.

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