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

Summary:

Drug interactions are reported among people who take Cardura (doxazosin mesylate) and Valacyclovir (valacyclovir hydrochloride). Common drug interactions include anaemia among females and respiratory failure among males.

The phase IV clinical study analyzes what interactions people have when they take Cardura and Valacyclovir. It is created by eHealthMe based on reports of 15 people who take the same drugs from the FDA, and is updated regularly.

What is Cardura?

Cardura has active ingredients of doxazosin mesylate. It is often used in high blood pressure. eHealthMe is studying from 20,379 Cardura users. Check the latest studies of Cardura.

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.

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, 30, 2026

15 people who take Cardura and Valacyclovir together, and have interactions are studied.

Cardura and Valacyclovir drug interactions.

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

female:

Anaemia (lack of blood)
Asthenia (weakness)
Hypokalaemia (low potassium)
Hyponatraemia (abnormally low level of sodium in the blood; associated with dehydration)
Hypotension (abnormally low blood pressure)
Neutrophil count decreased (less than normal number of neutrophil a type of blood cell)
Presyncope
Sinus bradycardia (an unusually slow heartbeat due to heart disease)
Vomiting
Cardiac failure congestive

male:

Respiratory failure (inadequate gas exchange by the respiratory system)
Septic shock (shock due to blood infection)
Multiple fractures
Osteoporosis (bones weak and more likely to break)
Pain
Pneumonia aspiration (bronchopneumonia that develops due to the entrance of foreign materials into the bronchial tree)
Cardiac failure congestive
Death
Foot fracture
Hospitalisation

What are the common drug interactions of Cardura 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:

n/a

60+:

Respiratory failure (inadequate gas exchange by the respiratory system)
Septic shock (shock due to blood infection)
Presyncope
Sinus bradycardia (an unusually slow heartbeat due to heart disease)
Vomiting
Pneumonia aspiration (bronchopneumonia that develops due to the entrance of foreign materials into the bronchial tree)
Cardiac failure congestive
Coronary artery disease (plaque building up along the inner walls of the arteries of the heart, which narrows the arteries and restricts blood flow to the heart)
Death
Dysgeusia (disorder of the sense of taste)

What are the existing conditions these people have? *

Multiple Myeloma (cancer of the plasma cells): 7 people, 46.67%
Weakness: 2 people, 13.33%
Enlarged Prostate: 2 people, 13.33%
Hiv Infection: 2 people, 13.33%
Herpes Simplex (herpes simplex is a common viral infection): 2 people, 13.33%
Renal Cell Carcinoma (a kidney cancer): 2 people, 13.33%
Nausea (feeling of having an urge to vomit): 1 person, 6.67%
Laxative Supportive Care: 1 person, 6.67%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 1 person, 6.67%
Oedema Peripheral (superficial swelling): 1 person, 6.67%

* Approximation only. Some reports may have incomplete information.

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