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

Summary:

Drug interactions are reported among people who take Tysabri (natalizumab) and Erbitux (cetuximab). Common drug interactions include diarrhoea among females and metastatic squamous cell carcinoma among males.

The phase IV clinical study analyzes what interactions people have when they take Tysabri and Erbitux. It is created by eHealthMe based on reports of 14 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 Erbitux?

Erbitux has active ingredients of cetuximab. It is often used in cancer. eHealthMe is studying from 19,276 Erbitux users. Check the latest studies of Erbitux.

On Jul, 16, 2026

14 people who take Tysabri and Erbitux together, and have interactions are studied.

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

female:

Diarrhoea
Thrombocytopenia (decrease of platelets in blood)
Rash
Febrile neutropenia (fever with reduced white blood cells)
Ascites (accumulation of fluid in the abdominal cavity)
Blood creatine phosphokinase increased
Blood creatinine increased
Fatigue (feeling of tiredness)
Infusion related reaction
Neutropenia (an abnormally low number of neutrophils)

male:

Metastatic squamous cell carcinoma (cancer of squamous cells spreads to other part)
Back pain
Muscular weakness (muscle weakness)
Nausea (feeling of having an urge to vomit)
Pain in extremity
Poor venous access
Stress
Syncope (loss of consciousness with an inability to maintain postural tone)
Tremor (trembling or shaking movements in one or more parts of your body)
Laryngeal mass (mass on larynx)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

Infusion related reaction
Neck pain
Pruritus (severe itching of the skin)
Rash

30-39:

n/a

40-49:

Dehydration (dryness resulting from the removal of water)
Device related infection
Progressive multifocal leukoencephalopathy (rapidly progressive neuromuscular disease caused by opportunistic infection of brain cells)
Pyrexia (fever)
Sinus tachycardia (a heart rhythm with elevated rate of impulses originating from the sinoatrial node)

50-59:

Metastatic squamous cell carcinoma (cancer of squamous cells spreads to other part)
Laryngeal mass (mass on larynx)
Vocal cord thickening
Dermatitis acneiform (dermatoses including acne vulgaris, rosacea, folliculitis, and perioral dermatitis)
Fatigue (feeling of tiredness)
Groin abscess (pus in groin)
Headache (pain in head)
Liver disorder (liver diseases)
Lung infection
Migraine (headache)

60+:

Diarrhoea
Fatigue (feeling of tiredness)
Memory impairment
Muscular weakness (muscle weakness)
Nausea (feeling of having an urge to vomit)
Pain in extremity
Poor venous access
Syncope (loss of consciousness with an inability to maintain postural tone)
Tremor (trembling or shaking movements in one or more parts of your body)
Febrile neutropenia (fever with reduced white blood cells)

What are the existing conditions these people have? *

Colon Cancer: 4 people, 28.57%
Oral Cancer (mouth cancer): 2 people, 14.29%
Sleep Disorder: 1 person, 7.14%
Pain: 1 person, 7.14%
Migraine (headache): 1 person, 7.14%
Metastases To Lung (cancer spreads to lung): 1 person, 7.14%
Gait Disturbance: 1 person, 7.14%
Colorectal Cancer Metastatic (cancer of colon and rectal spreads to other parts): 1 person, 7.14%

* Approximation only. Some reports may have incomplete information.

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