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

Summary:

Drug interactions are reported among people who take Ritalin (methylphenidate hydrochloride) and Carbidopa (carbidopa). Common drug interactions include dystonia among females and hallucination among males.

The phase IV clinical study analyzes what interactions people have when they take Ritalin and Carbidopa. 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 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.

What is Carbidopa?

Carbidopa has active ingredients of carbidopa. It is often used in parkinson's disease. eHealthMe is studying from 3,061 Carbidopa users. Check the latest studies of Carbidopa.

On Jul, 10, 2026

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

Ritalin and Carbidopa drug interactions.

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

female:

Dystonia (abnormal muscle tone)
Coombs negative haemolytic anaemia
Cough
Cytomegalovirus test positive
Decreased appetite
Dizziness
Emotional disorder
Facial paralysis (loss of function of face muscle)
Haemolytic anaemia (anaemia due to haemolysis)
Headache (pain in head)

male:

Hallucination (an experience involving the perception of something not present)
Dehydration (dryness resulting from the removal of water)
Confusional state
Constipation
Decreased appetite
Diarrhoea
Fall
General physical health deterioration (weak health status)
Head injury
Incontinence (lack of moderation or self-control)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Facial paralysis (loss of function of face muscle)

40-49:

n/a

50-59:

n/a

60+:

Hallucination (an experience involving the perception of something not present)
Skin infection
Head injury
Incontinence (lack of moderation or self-control)
Insomnia (sleeplessness)
On and off phenomenon
Procedural pain
Serum ferritin increased
Somnolence (a state of near-sleep, a strong desire for sleep)
Urinary tract infection

What are the existing conditions these people have? *

Cataplexy (loss of muscle tone accompanied by full conscious awareness): 3 people, 16.67%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 3 people, 16.67%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 2 people, 11.11%
Movement - Uncontrolled Or Slow: 2 people, 11.11%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 2 people, 11.11%
Hallucinations (sensations that appear real but are created by your mind): 2 people, 11.11%
Thyroid Diseases: 1 person, 5.56%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 1 person, 5.56%
Concussion (short loss of normal brain function in response to a head injury): 1 person, 5.56%
Delusion (a false belief or opinion): 1 person, 5.56%

* Approximation only. Some reports may have incomplete information.

Do you take Ritalin and Carbidopa?

- Personalize this study to your gender, age, symptoms and drugs
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously