Lemtrada and Ritalin drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Lemtrada (alemtuzumab) and Ritalin (methylphenidate hydrochloride). Common drug interactions include gait disturbance among females and hypothyroidism among males.

The phase IV clinical study analyzes what interactions people have when they take Lemtrada and Ritalin. It is created by eHealthMe based on reports of 18 people who take the same drugs from the FDA, and is updated regularly.

What is Lemtrada?

Lemtrada has active ingredients of alemtuzumab. eHealthMe is studying from 8,317 Lemtrada users. Check the latest studies of Lemtrada.

What is Ritalin?

Ritalin has active ingredients of methylphenidate hydrochloride. It is often used in attention deficit hyperactivity disorder. eHealthMe is studying from 29,427 Ritalin users. Check the latest studies of Ritalin.

On Jul, 27, 2026

18 people who take Lemtrada and Ritalin together, and have interactions are studied.

What are the common drug interactions of Lemtrada and Ritalin, by gender? *:

female:

Gait disturbance
Hypersomnia (excessive daytime sleepiness (eds))
Pneumonia
Urticaria (rash of round, red welts on the skin that itch intensely)
Leukocyturia (presence of white blood cells in urine)
Lymphocyte count decreased
Lymphocyte percentage decreased
Monocyte percentage increased
Neutrophil percentage increased
Urine abnormality

male:

Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development)
Tonsil cancer
Feeling drunk

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Back pain
Erythema (redness of the skin)
Gait disturbance
Headache (pain in head)
Muscular weakness (muscle weakness)
Rash
Urticaria (rash of round, red welts on the skin that itch intensely)
Leukocyturia (presence of white blood cells in urine)
Lymphocyte count decreased
Lymphocyte percentage decreased

40-49:

Back pain
Balance disorder
Binge eating (pattern of disordered eating which consists of episodes of uncontrollable eating)
Blood pressure increased
Bradycardia (abnormally slow heart action)
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Cardiac failure
Cd4 lymphocytes decreased
Cd4 lymphocytes increased
Chest pain

50-59:

Death

60+:

Fatigue (feeling of tiredness)

What are the existing conditions these people have? *

Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 8 people, 44.44%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 6 people, 33.33%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 3 people, 16.67%
Pain: 3 people, 16.67%
Gait Disturbance: 1 person, 5.56%

* Approximation only. Some reports may have incomplete information.

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