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

Summary:

Drug interactions are reported among people who take Tysabri (natalizumab) and Selenium (selenium). Common drug interactions include gait disturbance among females and seizure among males.

The phase IV clinical study analyzes what interactions people have when they take Tysabri and Selenium. It is created by eHealthMe based on reports of 20 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 Selenium?

Selenium has active ingredients of selenium. It is often used in vitamin supplementation. eHealthMe is studying from 5,314 Selenium users. Check the latest studies of Selenium.

On Jun, 16, 2026

20 people who take Tysabri and Selenium together, and have interactions are studied.

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

female:

Gait disturbance
Muscle spasticity (tight or stiff muscles and an inability to control those muscles)
Tonic convulsion (the person will quickly lose consciousness and the skeletal muscles will suddenly tense, often causing the extremities to be pulled towards the body or rigidly pushed away from it)
Anaphylactic reaction (serious allergic reaction)
Blood creatinine increased
Brain injury
Cholecystitis (infection of gallbladder)
Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)
Pancreatitis acute (sudden inflammation of pancreas)
Paralysis

male:

Seizure (abnormal excessive or synchronous neuronal activity in the brain)
Hepatitis (inflammation of the liver)
Movement disorder (neurological syndromes where they may be excess of movement or a paucity of movement that is not connected to weakness)
Muscle spasticity (tight or stiff muscles and an inability to control those muscles)
Rash macular (small, flat red spots)
Therapeutic response unexpected
Weight decreased
Decreased immune responsiveness
Fall
Fatigue (feeling of tiredness)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

Brain injury

30-39:

n/a

40-49:

Tonic convulsion (the person will quickly lose consciousness and the skeletal muscles will suddenly tense, often causing the extremities to be pulled towards the body or rigidly pushed away from it)

50-59:

Malaise (a feeling of general discomfort or uneasiness)
Mobility decreased (ability to move is reduced)
Herpes sepsis (whole-body inflammation caused by herpes simplex virus (hsv))
Loss of consciousness
Memory impairment
Movement disorder (neurological syndromes where they may be excess of movement or a paucity of movement that is not connected to weakness)
Therapeutic response unexpected
Weight decreased
Cholecystitis (infection of gallbladder)
Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)

60+:

Blood creatinine increased
Fall
Jc virus test positive
Joint swelling
Pneumonia aspiration (bronchopneumonia that develops due to the entrance of foreign materials into the bronchial tree)
Pneumonitis (inflammation of the walls of the alveoli in the lungs)

What are the existing conditions these people have? *

Pain: 9 people, 45.00%
Gait Disturbance: 5 people, 25.00%
Tonic Convulsion (the person will quickly lose consciousness and the skeletal muscles will suddenly tense, often causing the extremities to be pulled towards the body or rigidly pushed away from it): 2 people, 10.00%
Nausea (feeling of having an urge to vomit): 2 people, 10.00%
Dizziness: 2 people, 10.00%
Birth Control: 2 people, 10.00%
Weakness: 1 person, 5.00%
Secondary Progressive Multiple Sclerosis (a stage of ms which comes after relapsing remitting ms in many cases): 1 person, 5.00%
Osteoporosis Post-Menopausal (weak bone with possibility to break after stopped menstrual cycles): 1 person, 5.00%
Movement Disorder (neurological syndromes where they may be excess of movement or a paucity of movement that is not connected to weakness): 1 person, 5.00%

* Approximation only. Some reports may have incomplete information.

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