Tysabri and Rebetol drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Tysabri (natalizumab) and Rebetol (ribavirin). Common drug interactions include haemoglobin decreased among females and white blood cell count decreased among males.

The phase IV clinical study analyzes what interactions people have when they take Tysabri and Rebetol. It is created by eHealthMe based on reports of 16 people who take the same drugs from the FDA, and is updated regularly.

What is Tysabri?

Tysabri has active ingredients of natalizumab. It is often used in multiple sclerosis. eHealthMe is studying from 221,369 Tysabri users. Check the latest studies of Tysabri.

What is Rebetol?

Rebetol has active ingredients of ribavirin. eHealthMe is studying from 25,932 Rebetol users. Check the latest studies of Rebetol.

On Jul, 10, 2026

16 people who take Tysabri and Rebetol together, and have interactions are studied.

What are the common drug interactions of Tysabri and Rebetol, by gender? *:

female:

Haemoglobin decreased
Malaise (a feeling of general discomfort or uneasiness)
Renal disorder (kidney disease)
White blood cell count decreased
Cystitis (inflammation of the wall of the bladder)
Diarrhoea
Dizziness
Nausea (feeling of having an urge to vomit)
Renal impairment (severely reduced kidney function)
Vomiting

male:

White blood cell count decreased
Fatigue (feeling of tiredness)
Rash
Anxiety
Arthralgia (joint pain)
Asthenia (weakness)
Attention deficit/hyperactivity disorder
Blindness
Cognitive disorder (mental health disorders affects learning, memory, perception, and problem solving)
Drug eruption (adverse drug reaction of the skin)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Haemoglobin decreased
Nausea (feeling of having an urge to vomit)
Renal disorder (kidney disease)
Cystitis (inflammation of the wall of the bladder)
Diarrhoea
Pharyngitis (inflammation of the pharynx, causing a sore throat)
Stomatitis (inflammation of mucous membrane of mouth)
Vertigo
Abortion spontaneous (naturally occurring miscarriage)
Mania (a state of abnormally elevated or irritable mood)

40-49:

White blood cell count decreased
Decreased appetite
Procedural pain
Shoulder operation
Rash
Diarrhoea
Nephrolithiasis (calculi in the kidneys)

50-59:

Cognitive disorder (mental health disorders affects learning, memory, perception, and problem solving)
Malaise (a feeling of general discomfort or uneasiness)
Dizziness
Renal impairment (severely reduced kidney function)
Vomiting
Balance disorder
Haemoglobin decreased
Memory impairment
Nervousness
White blood cell count decreased

60+:

Insomnia (sleeplessness)
Fatigue (feeling of tiredness)
Asthenia (weakness)
Basedow's disease (autoimmune disease where the thyroid is overactive, producing an excessive amount of thyroid hormones)
Constipation
Cystitis (inflammation of the wall of the bladder)
Decreased appetite
Diabetes mellitus (diabetes, caused by a deficiency of the pancreatic hormone insulin)
Diarrhoea
Disease recurrence

What are the existing conditions these people have? *

Hepatitis C: 9 people, 56.25%
Rashes (redness): 2 people, 12.50%
High Blood Pressure: 2 people, 12.50%
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect): 1 person, 6.25%
Nausea (feeling of having an urge to vomit): 1 person, 6.25%
Migraine (headache): 1 person, 6.25%
Meniere's Disease (a disorder of the inner ear that can affect hearing and balance to a varying degree): 1 person, 6.25%
Malaise (a feeling of general discomfort or uneasiness): 1 person, 6.25%
Iron Deficiency Anaemia: 1 person, 6.25%
Hyperuricaemia (level of uric acid in the blood that is abnormally high): 1 person, 6.25%

* Approximation only. Some reports may have incomplete information.

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