Flavin and Allegra drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Flavin (riboflavin (vitamin b2)) and Allegra (fexofenadine hydrochloride). Common drug interactions include diarrhoea among females and mental disorder among males.

The phase IV clinical study analyzes what interactions people have when they take Flavin and Allegra. It is created by eHealthMe based on reports of 57 people who take the same drugs from the FDA, and is updated regularly.

What is Flavin?

Flavin has active ingredients of riboflavin (vitamin b2). eHealthMe is studying from 2,870 Flavin users. Check the latest studies of Flavin.

What is Allegra?

Allegra has active ingredients of fexofenadine hydrochloride. It is often used in allergies. eHealthMe is studying from 75,497 Allegra users. Check the latest studies of Allegra.

On Jul, 24, 2026

57 people who take Flavin and Allegra together, and have interactions are studied.

What are the common drug interactions of Flavin and Allegra, by gender? *:

female:

Diarrhoea
Sinusitis (inflammation of sinus)
Cluster headache (one-sided head pain with tearing)
Flushing (the warm, red condition of human skin)
Nausea (feeling of having an urge to vomit)
Ovarian cyst (fluid filled sac of the ovary)
Rectal prolapse (falling of rectum from normal place)
Agitation (state of anxiety or nervous excitement)
Blood pressure increased
Heart rate increased

male:

Mental disorder (a psychological term for a mental or behavioural pattern or anomaly that causes distress or disability)
Schizoaffective disorder (a mental disorder characterized by disordered thought)
Nephrolithiasis (calculi in the kidneys)
Schizoaffective disorder depressive type (mental illness featuring schizophrenia and a mood disorder)
Anxiety
Arthralgia (joint pain)
Joint swelling
Loss of consciousness
Suicidal ideation

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

0-1:

n/a

2-9:

n/a

10-19:

Hospitalisation

20-29:

n/a

30-39:

Disease recurrence
Maternal exposure during pregnancy (use of substance during pregnancy)
Nasopharyngitis (inflammation of the nasopharynx)
Productive cough
Infective pulmonary exacerbation of cystic fibrosis (severe infective lung disease with production of abnormally thick mucus)
Dizziness
Abdominal distension
Agitation (state of anxiety or nervous excitement)
Blood pressure increased
Cluster headache (one-sided head pain with tearing)

40-49:

Diarrhoea
Anxiety
Flushing (the warm, red condition of human skin)
Migraine (headache)
Seizure (abnormal excessive or synchronous neuronal activity in the brain)
Thyroid disorder (thyroid diseases)
Dyspnoea exertional (breathlessness or shortness of breath)
Pallor
Palpitations (feelings or sensations that your heart is pounding or racing)
Syncope (loss of consciousness with an inability to maintain postural tone)

50-59:

Rectal prolapse (falling of rectum from normal place)
Upper respiratory tract infection
Sinusitis (inflammation of sinus)
Fatigue (feeling of tiredness)
Staphylococcal infection (an infection with staphylococcus bacteria)
Headache (pain in head)
Hunger
Increased appetite
Influenza
Infusion related reaction

60+:

Hidradenitis (chronic disease of a type of sweat gland)
Injection site pain
Pilonidal cyst
Pruritus (severe itching of the skin)
Sinus disorder (disease of sinus)
Urinary tract infection
Contusion (a type of hematoma of tissue in which capillaries)
Fall
Joint swelling
Post procedural discharge

What are the existing conditions these people have? *

Immunodeficiency Common Variable: 13 people, 22.81%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 11 people, 19.30%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 9 people, 15.79%
Cataplexy (loss of muscle tone accompanied by full conscious awareness): 7 people, 12.28%
Migraine (headache): 6 people, 10.53%
Hypersensitivity: 4 people, 7.02%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 4 people, 7.02%
Cystic Fibrosis (disease of the secretary glands): 4 people, 7.02%
Sleep Disorder: 4 people, 7.02%
Bowel Movement Irregularity: 3 people, 5.26%

* Approximation only. Some reports may have incomplete information.

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