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

Summary:

Drug interactions are reported among people who take Flomax (tamsulosin hydrochloride) and Valacyclovir hydrochloride (valacyclovir hydrochloride). Common drug interactions include nausea among females and pain among males.

The phase IV clinical study analyzes what interactions people have when they take Flomax 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 Flomax?

Flomax has active ingredients of tamsulosin hydrochloride. It is often used in enlarged prostate. eHealthMe is studying from 52,865 Flomax users. Check the latest studies of Flomax.

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.

On Jul, 09, 2026

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

Flomax and Valacyclovir hydrochloride drug interactions.

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

female:

Nausea (feeling of having an urge to vomit)
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect)
Piloerection (goose bumps)
Pruritus (severe itching of the skin)
Sleep disorder
Throat tightness
Bladder disorder
Blood pressure increased
Diarrhoea
Dizziness

male:

Pain
Anxiety
Fatigue (feeling of tiredness)
Gait disturbance
Hip arthroplasty
Insomnia (sleeplessness)
Nasopharyngitis (inflammation of the nasopharynx)
Neutropenia (an abnormally low number of neutrophils)
Osteoporosis (bones weak and more likely to break)
Pneumonia

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Asthenia (weakness)
Chronic kidney disease
Depressed mood
Dizziness
Emotional distress
Fall
Fatigue (feeling of tiredness)
Headache (pain in head)
Hypersomnia (excessive daytime sleepiness (eds))
Hypoaesthesia (reduced sense of touch or sensation)

40-49:

Hip arthroplasty
Anhedonia (inability to experience pleasure from activities usually found enjoyable)
Anxiety
Bone density decreased
Bone loss
Chronic kidney disease
Emotional distress
Osteopenia (a condition where bone mineral density is lower than normal)
Pain
Renal failure (kidney dysfunction)

50-59:

Asthenia (weakness)
Asthma
Ear pain
Epiglottitis (inflammation of the epiglottis)
Fatigue (feeling of tiredness)
Headache (pain in head)
Heart rate increased
Hot flush (sudden feelings of heat)
Hypotension (abnormally low blood pressure)
Infusion related reaction

60+:

Febrile neutropenia (fever with reduced white blood cells)
Anxiety
Anhedonia (inability to experience pleasure from activities usually found enjoyable)
Atrioventricular block first degree (heart block first degree)
Back pain
Bone density decreased
Bundle branch block left (absence of transmission of electric impulses from the atrioventricular (av) bundle of his to the left ventricle)
Cardiac failure congestive
Cardiomyopathy (weakening of the heart muscle)
Decreased activity

What are the existing conditions these people have? *

Multiple Myeloma (cancer of the plasma cells): 10 people, 27.03%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 5 people, 13.51%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 4 people, 10.81%
Hiv Infection: 4 people, 10.81%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 4 people, 10.81%
Pain: 3 people, 8.11%
Prostatomegaly (enlargement of the prostate): 2 people, 5.41%
Muscle Spasms (muscle contraction): 2 people, 5.41%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 2 people, 5.41%
Hairy Cell Leukaemia (a type of blood cancer): 2 people, 5.41%

* Approximation only. Some reports may have incomplete information.

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