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

Summary:

Drug interactions are reported among people who take Caffeine (caffeine) and Flomax (tamsulosin hydrochloride). Common drug interactions include anxiety among females and obsessive-compulsive disorder among males.

The phase IV clinical study analyzes what interactions people have when they take Caffeine and Flomax. It is created by eHealthMe based on reports of 16 people who take the same drugs from the FDA, and is updated regularly.

What is Caffeine?

Caffeine has active ingredients of caffeine. It is often used in fatigue. eHealthMe is studying from 6,667 Caffeine users. Check the latest studies of Caffeine.

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.

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 Sep, 02, 2026

16 people who take Caffeine and Flomax together, and have interactions are studied.

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

female:

Anxiety
Asthenia (weakness)
Asthma
Bladder disorder
Blood pressure increased
Drug hypersensitivity
Ear pain
Epiglottitis (inflammation of the epiglottis)
Facial pain
Headache (pain in head)

male:

Obsessive-compulsive disorder (an anxiety disorder characterized by intrusive thoughts that produce uneasiness, apprehension, fear, or worry;)
Actinic keratosis (skin disease due to sun exposure)
Lumbar radiculopathy (radicular pain in the low back and legs)
Melanocytic naevus (a type of lesion that contains nevus cells (a type of melanocyte))
Neuropathy peripheral (surface nerve damage)
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect)
Polyp
Rectal haemorrhage (bleeding from anus)
Telangiectasia (small dilated blood vessels near the surface of the skin)
Abdominal tenderness

What are the common drug interactions of Caffeine and Flomax, 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:

Anxiety
Asthenia (weakness)
Asthma
Bladder disorder
Blood pressure increased
Cardiac valve disease (heart valve disease)
Drug hypersensitivity
Ear pain
Epiglottitis (inflammation of the epiglottis)
Facial pain

60+:

Abdominal tenderness
Bone pain
Incision site pain
Influenza
Insomnia (sleeplessness)
Loss of consciousness
Malnutrition (a condition that results from eating a diet in which certain nutrients are lacking)
Nasopharyngitis (inflammation of the nasopharynx)
Nausea (feeling of having an urge to vomit)
Orthostatic intolerance (development of symptoms when standing upright which are relieved when sitting back down again)

What are the existing conditions these people have? *

Zinc Deficiency: 4 people, 25.00%
Marasmus (severe malnutrition characterized by energy deficiency): 4 people, 25.00%
Insomnia (sleeplessness): 4 people, 25.00%
Incision Site Pain: 4 people, 25.00%
Hyponatremia (abnormally low level of sodium in the blood; associated with dehydration): 4 people, 25.00%
Hypokalemia (low potassium): 4 people, 25.00%
Hyperuricaemia (level of uric acid in the blood that is abnormally high): 4 people, 25.00%
Head Injury: 4 people, 25.00%
Fever: 4 people, 25.00%
Essential Tremor: 4 people, 25.00%

* Approximation only. Some reports may have incomplete information.

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