Tamsulosin and Firdapse drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Tamsulosin (tamsulosin) and Firdapse (amifampridine). Common drug interactions include klebsiella bacteraemia among females and asthenia among males.

The phase IV clinical study analyzes what interactions people have when they take Tamsulosin and Firdapse. It is created by eHealthMe based on reports of 63 people who take the same drugs from the FDA, and is updated regularly.

What is Tamsulosin?

Tamsulosin has active ingredients of tamsulosin. It is often used in prostate examination abnormal. eHealthMe is studying from 72,635 Tamsulosin users. Check the latest studies of Tamsulosin.

What is Firdapse?

Firdapse has active ingredients of amifampridine. eHealthMe is studying from 2,112 Firdapse users. Check the latest studies of Firdapse.

On Aug, 02, 2026

63 people who take Tamsulosin and Firdapse together, and have interactions are studied.

Tamsulosin and Firdapse drug interactions.

What are the common drug interactions of Tamsulosin and Firdapse, by gender? *:

female:

Klebsiella bacteraemia (klebsiella bacteria in blood after infection to lungs)
Epigastric discomfort
Haematochezia (passage of stools containing blood)
Gastrointestinal haemorrhage (bleeding gastrointestinal tract)
Klebsiella infection
Nasal congestion (blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels)
Renal impairment (severely reduced kidney function)
Sudden death
Flank pain (a distressing sensation experienced around the lower back and the upper abdomen)
Haematuria (presence of blood in urine)

male:

Asthenia (weakness)
Pain in extremity
Hospitalisation
Musculoskeletal stiffness (stiffness of the body's muscles, joints, tendons, ligaments and nerves)
Pain
Hypoaesthesia (reduced sense of touch or sensation)
Rib fracture
Spinal fracture (fracture in one of vertebrae)
Weight increased
Anaemia (lack of blood)

What are the common drug interactions of Tamsulosin and Firdapse, 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:

Myasthenic syndrome (a group of conditions characterized by muscle weakness (myasthenia) that worsens with physical exertion)
Adverse reaction
Anaphylactic shock (severe and rapid and sometimes fatal hypersensitivity reaction to a substance)
Chest pain
Pneumonia
Procedural complication
Temperature intolerance (inability to go in temperature)
Throat irritation

60+:

Fall
Pain in extremity
Oedema peripheral (superficial swelling)
Tremor (trembling or shaking movements in one or more parts of your body)
Anaemia (lack of blood)
Performance status decreased
Proteus infection (proteus can cause urinary tract infections)
Klebsiella sepsis (klebsiella causes a potentially fatal whole-body inflammation)
Nephropathy toxic (damage to kidney due to toxins)
Diabetes mellitus (diabetes, caused by a deficiency of the pancreatic hormone insulin)

What are the existing conditions these people have? *

Lambert-Eaton Syndrome (this means your immune system mistakenly targets healthy cells and tissues in the body): 62 people, 98.41%
Atrial Fibrillation/flutter (atrial fibrillation and flutter are abnormal heart rhythms in which the atria, or upper chambers of the heart, are out of sync with the ventricles): 5 people, 7.94%

* Approximation only. Some reports may have incomplete information.

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