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

Summary:

Drug interactions are reported among people who take Flomax (tamsulosin hydrochloride) and Erbitux (cetuximab). Common drug interactions include rash among males.

The phase IV clinical study analyzes what interactions people have when they take Flomax and Erbitux. It is created by eHealthMe based on reports of 41 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 Erbitux?

Erbitux has active ingredients of cetuximab. It is often used in cancer. eHealthMe is studying from 19,276 Erbitux users. Check the latest studies of Erbitux.

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, 23, 2026

41 people who take Flomax and Erbitux together, and have interactions are studied.

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

female:

n/a

male:

Rash
Dehydration (dryness resulting from the removal of water)
Dizziness
Dyspnoea (difficult or laboured respiration)
Headache (pain in head)
Nausea (feeling of having an urge to vomit)
Pruritus (severe itching of the skin)
Pyrexia (fever)
Cardiac arrest
Confusional state

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

Confusional state

50-59:

Cough
Decreased appetite
Dehydration (dryness resulting from the removal of water)
Dizziness
Dyspnoea (difficult or laboured respiration)
Headache (pain in head)
Hearing impaired
Hypoglycaemia (deficiency of glucose in the bloodstream)
Hypotension (abnormally low blood pressure)
Hypoxia (low oxygen in tissues)

60+:

Rash
Dehydration (dryness resulting from the removal of water)
Anaphylactic reaction (serious allergic reaction)
Decreased appetite
Hypophagia (reduced food intake)
Rash maculo-papular (red area on the skin that is covered with small confluent bumps)
Confusional state
Dry skin
Electrocardiogram st segment elevation
Hypomagnesaemia (electrolyte disturbance in which there is an abnormally low level of magnesium in the blood)

What are the existing conditions these people have? *

Colon Cancer Metastatic (cancer of colon spreads to other part of body): 8 people, 19.51%
Colon Cancer: 8 people, 19.51%
Oral Cancer (mouth cancer): 5 people, 12.20%
Tongue Neoplasm Malignant Stage Unspecified: 3 people, 7.32%
Squamous Cell Carcinoma (a cancer of a kind of epithelial cell): 3 people, 7.32%

* Approximation only. Some reports may have incomplete information.

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