Tamiflu and Cimetidine drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Tamiflu (oseltamivir phosphate) and Cimetidine (cimetidine). Common drug interactions include blood glucose decreased among females and dyskinesia among males.

The phase IV clinical study analyzes what interactions people have when they take Tamiflu and Cimetidine. 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 Tamiflu?

Tamiflu has active ingredients of oseltamivir phosphate. It is often used in the flu. eHealthMe is studying from 22,209 Tamiflu users. Check the latest studies of Tamiflu.

What is Cimetidine?

Cimetidine has active ingredients of cimetidine. It is often used in gastroesophageal reflux disease. eHealthMe is studying from 10,531 Cimetidine users. Check the latest studies of Cimetidine.

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, 01, 2026

16 people who take Tamiflu and Cimetidine together, and have interactions are studied.

Tamiflu and Cimetidine drug interactions.

What are the common drug interactions of Tamiflu and Cimetidine, by gender? *:

female:

Blood glucose decreased
Blood pressure decreased
Drug hypersensitivity
Gastric disorder (disease of stomach)
Hypothermia (body temperature drops below the required temperature for normal metabolism and body functions)
Pain
Skin exfoliation (removal of the oldest dead skin cells)
Sputum increased
Visual acuity reduced (reduced clearness of vision)
Weight decreased

male:

Dyskinesia (abnormality or impairment of voluntary movement)
Extrapyramidal disorder (involuntary muscle spasms in the face and neck)
Epstein-barr virus antibody positive
Interleukin-2 receptor increased
Interstitial lung disease
Lung disorder (lung disease)
Lymphocyte stimulation test positive
Rheumatoid factor increased
Speech disorder
Antineutrophil cytoplasmic antibody increased

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

0-1:

n/a

2-9:

n/a

10-19:

Dyskinesia (abnormality or impairment of voluntary movement)
Extrapyramidal disorder (involuntary muscle spasms in the face and neck)
Speech disorder
Binocular eye movement disorder

20-29:

n/a

30-39:

n/a

40-49:

n/a

50-59:

Blood glucose decreased
Chronic kidney disease
Drug hypersensitivity
Gastric disorder (disease of stomach)
Pain
Skin exfoliation (removal of the oldest dead skin cells)
Visual acuity reduced (reduced clearness of vision)
Weight decreased

60+:

Antineutrophil cytoplasmic antibody increased
Antinuclear antibody increased
Lung disorder (lung disease)
Lymphocyte stimulation test positive
Rheumatoid factor increased
Sputum increased
Blood lactate dehydrogenase increased
Blood pressure decreased
Carcinoembryonic antigen increased
Cytomegalovirus test positive

What are the existing conditions these people have? *

High Blood Pressure: 6 people, 37.50%
Multiple Myeloma (cancer of the plasma cells): 1 person, 6.25%
Inflammation: 1 person, 6.25%
Infection: 1 person, 6.25%
Hyperlipidaemia (presence of excess lipids in the blood): 1 person, 6.25%

* Approximation only. Some reports may have incomplete information.

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