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

Summary:

Drug interactions are reported among people who take Northera (droxidopa) and Valacyclovir (valacyclovir hydrochloride). Common drug interactions include heart rate increased among females and blood pressure increased among males.

The phase IV clinical study analyzes what interactions people have when they take Northera and Valacyclovir. It is created by eHealthMe based on reports of 36 people who take the same drugs from the FDA, and is updated regularly.

What is Northera?

Northera has active ingredients of droxidopa. eHealthMe is studying from 22,874 Northera users. Check the latest studies of Northera.

What is Valacyclovir?

Valacyclovir has active ingredients of valacyclovir hydrochloride. It is often used in genital herpes. eHealthMe is studying from 42,107 Valacyclovir users. Check the latest studies of Valacyclovir.

On Jul, 07, 2026

36 people who take Northera and Valacyclovir together, and have interactions are studied.

Northera and Valacyclovir drug interactions.

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

female:

Heart rate increased
Hypertension (high blood pressure)
Nausea (feeling of having an urge to vomit)
Vomiting
Asthenia (weakness)
Dizziness
Fall
Fatigue (feeling of tiredness)
Head injury
Headache (pain in head)

male:

Blood pressure increased
Chronic obstructive pulmonary disease (a progressive disease that makes it hard to breathe)
Acute myocardial infarction (acute heart attack)
Adverse reaction
Alanine aminotransferase increased
Blood glucose increased
Death
Diarrhoea
Drug ineffective
Dysuria (painful or difficult urination)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Anaemia (lack of blood)
Exostosis (formation of new bone on the surface of a bone)
Hyperthyroidism (over activity of the thyroid gland)
Incontinence (lack of moderation or self-control)
Intervertebral disc protrusion (spinal disc protrusion)
Alanine aminotransferase increased
Blood glucose increased
Diarrhoea
Drug ineffective
Dysuria (painful or difficult urination)

40-49:

Heart rate increased
Hypertension (high blood pressure)
Vomiting
Asthenia (weakness)
Fall
Fatigue (feeling of tiredness)
Head injury
Seizure (abnormal excessive or synchronous neuronal activity in the brain)
Headache (pain in head)
Nausea (feeling of having an urge to vomit)

50-59:

Blood potassium decreased
Electrocardiogram qt prolonged
Syncope (loss of consciousness with an inability to maintain postural tone)
Adverse reaction
Anxiety
Balance disorder
Malaise (a feeling of general discomfort or uneasiness)

60+:

Blood pressure increased
Chronic obstructive pulmonary disease (a progressive disease that makes it hard to breathe)
Pneumonia
Pulmonary congestion (congestion in the lungs)
Seizure like phenomena (a variety of medical conditions may produce sudden episodes which have some similarities to epileptic seizures)
Syncope (loss of consciousness with an inability to maintain postural tone)
Hypersomnia (excessive daytime sleepiness (eds))
Foot amputation (loss of foot)
Acute myocardial infarction (acute heart attack)
Death

What are the existing conditions these people have? *

Orthostatic Hypotension (a medical condition consisting of a sudden decrease in blood pressure when a person stands up): 13 people, 36.11%
Hypotension (abnormally low blood pressure): 6 people, 16.67%
Autonomic Neuropathy (malfunction of the autonomic nervous system (ans)): 5 people, 13.89%
Narcolepsy (brain's inability to regulate sleep-wake cycles normally): 4 people, 11.11%
Cataplexy (loss of muscle tone accompanied by full conscious awareness): 4 people, 11.11%
Parkinson's Disease: 3 people, 8.33%
Hallucinations (sensations that appear real but are created by your mind): 3 people, 8.33%
Delusion (a false belief or opinion): 3 people, 8.33%
Autonomic Nervous System Imbalance (autonomic nervous system is of net equal emphasis): 3 people, 8.33%
Constipation: 2 people, 5.56%

* Approximation only. Some reports may have incomplete information.

Do you take Northera and Valacyclovir?

- 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