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

Summary:

Drug interactions are reported among people who take Ritalin (methylphenidate hydrochloride) and Valacyclovir hydrochloride (valacyclovir hydrochloride). Common drug interactions include cough among females and sepsis among males.

The phase IV clinical study analyzes what interactions people have when they take Ritalin and Valacyclovir hydrochloride. It is created by eHealthMe based on reports of 37 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 Valacyclovir hydrochloride?

Valacyclovir hydrochloride has active ingredients of valacyclovir hydrochloride. It is often used in herpes zoster. eHealthMe is studying from 12,929 Valacyclovir hydrochloride users. Check the latest studies of Valacyclovir hydrochloride.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 21, 2026

37 people who take Ritalin and Valacyclovir hydrochloride together, and have interactions are studied.

Ritalin and Valacyclovir hydrochloride drug interactions.

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

female:

Cough
Headache (pain in head)
Migraine (headache)
Nasopharyngitis (inflammation of the nasopharynx)
Blood pressure systolic increased
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Dyspnoea exertional (breathlessness or shortness of breath)
Epistaxis (bleed from the nose)
Laryngitis (inflammation of the larynx)
Nasal congestion (blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels)

male:

Sepsis (a severe blood infection that can lead to organ failure and death)
Cataplexy (loss of muscle tone accompanied by full conscious awareness)
Febrile neutropenia (fever with reduced white blood cells)
Gastroenteritis viral (inflammation of stomach and intestine caused by virus infection)
Lung infection
Neutropenia (an abnormally low number of neutrophils)
Pneumonia

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

Abnormal behaviour
Allergy to metals
Dizziness
Drug ineffective
Drug intolerance (drug sensitivity)
Herpes virus infection
Memory impairment
Nightmare (unpleasant dream)
Rhinitis allergic (inflammation of the nasal airways due to allergy)
Sinusitis (inflammation of sinus)

30-39:

Nausea (feeling of having an urge to vomit)
Asthma
Cervix carcinoma (cancer of cervix)
Dysmenorrhoea (painful menstruation)
Facet joint syndrome (problem with movement of the facet joints of the spine)
Fibromyalgia (a long-term condition which causes pain all over the body)
Gait disturbance
Intervertebral disc degeneration (spinal disc degeneration)
Intervertebral disc protrusion (spinal disc protrusion)
Malaise (a feeling of general discomfort or uneasiness)

40-49:

Drug ineffective
Limb injury
Fall
Upper limb fracture
Anxiety
Pain
Dizziness
Hip arthroplasty
Panic attack
Seasonal allergy (allergic condition due to certain season)

50-59:

n/a

60+:

Blood pressure increased
Pneumonia
Migraine (headache)
Nasal congestion (blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels)
Nasopharyngitis (inflammation of the nasopharynx)
Oral herpes (viral infection of mouth)
Rheumatoid arthritis (a chronic progressive disease causing inflammation in the joints)
Sinus congestion (blockage of sinus)
Sinusitis (inflammation of sinus)
Stomatitis (inflammation of mucous membrane of mouth)

What are the existing conditions these people have? *

Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 18 people, 48.65%
Upper-Airway Cough Syndrome: 14 people, 37.84%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 14 people, 37.84%
Cataplexy (loss of muscle tone accompanied by full conscious awareness): 12 people, 32.43%
Drowsiness: 9 people, 24.32%
Pain: 2 people, 5.41%
Hairy Cell Leukaemia (a type of blood cancer): 2 people, 5.41%
Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 2 people, 5.41%
Blood Pressure Abnormal: 2 people, 5.41%

* Approximation only. Some reports may have incomplete information.

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