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

Summary:

Drug interactions are reported among people who take Fulvestrant (fulvestrant) and Valacyclovir (valacyclovir hydrochloride). Common drug interactions include neoplasm progression among females.

The phase IV clinical study analyzes what interactions people have when they take Fulvestrant and Valacyclovir. It is created by eHealthMe based on reports of 11 people who take the same drugs from the FDA, and is updated regularly.

What is Fulvestrant?

Fulvestrant has active ingredients of fulvestrant. eHealthMe is studying from 15,769 Fulvestrant users. Check the latest studies of Fulvestrant.

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, 17, 2026

11 people who take Fulvestrant and Valacyclovir together, and have interactions are studied.

Fulvestrant and Valacyclovir drug interactions.

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

female:

Neoplasm progression (growth of tumour)
Fatigue (feeling of tiredness)
White blood cell count decreased
Aortic stenosis (obstruction to the outflow of blood from the left ventricle into the aorta)
Arthralgia (joint pain)
Asthenia (weakness)
Breast cancer
Cardiac failure chronic
Cough
Diarrhoea

male:

n/a

What are the common drug interactions of Fulvestrant 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:

n/a

40-49:

n/a

50-59:

Aortic stenosis (obstruction to the outflow of blood from the left ventricle into the aorta)
Arthralgia (joint pain)
Breast cancer
Cardiac failure chronic
Disturbance in attention
Fatigue (feeling of tiredness)
Gastrooesophageal reflux disease (stomach contents (food or liquid) leak backwards from the stomach into the oesophagus)
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development)
Memory impairment
Metastases to bone (cancer spreads to bone)

60+:

Nausea (feeling of having an urge to vomit)
Neoplasm progression (growth of tumour)
Asthenia (weakness)
Cough
Diarrhoea
Diverticulitis (digestive disease which involves the formation of pouches (diverticula) within the bowel wall)
Dry eye (lack of adequate tears)
Dyspnoea (difficult or laboured respiration)
Epistaxis (bleed from the nose)
Eye disorder

What are the existing conditions these people have? *

Breast Cancer Female: 3 people, 27.27%
Breast Cancer Metastatic: 2 people, 18.18%
Breast Cancer: 2 people, 18.18%
Hodgkin's Lymphoma (cancer originating from white blood cells): 1 person, 9.09%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 1 person, 9.09%

* Approximation only. Some reports may have incomplete information.

Do you take Fulvestrant 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