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

Summary:

Drug interactions are reported among people who take Diazepam (diazepam) and Firdapse (amifampridine). Common drug interactions include nausea among females and drug ineffective among males.

The phase IV clinical study analyzes what interactions people have when they take Diazepam and Firdapse. It is created by eHealthMe based on reports of 11 people who take the same drugs from the FDA, and is updated regularly.

What is Diazepam?

Diazepam has active ingredients of diazepam. It is often used in stress and anxiety. eHealthMe is studying from 108,384 Diazepam users. Check the latest studies of Diazepam.

What is Firdapse?

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

On Jul, 25, 2026

11 people who take Diazepam and Firdapse together, and have interactions are studied.

Diazepam and Firdapse drug interactions.

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

female:

Nausea (feeling of having an urge to vomit)
Discomfort
Dizziness
Hypertension (high blood pressure)
Inflammation
Insomnia (sleeplessness)
Lethargy (tiredness)
Mental disorder (a psychological term for a mental or behavioural pattern or anomaly that causes distress or disability)
Mental impairment (a condition affecting the body, perhaps through sight or hearing loss, a mobility difficulty or a health condition)
Motion sickness (travel sickness)

male:

Drug ineffective

What are the common drug interactions of Diazepam 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:

Coma (state of unconsciousness lasting more than six hours)
Gastric perforation (hole in stomach)

40-49:

n/a

50-59:

Abdominal pain
Bladder pain
Colitis (inflammation of colon)
Urinary tract infection
Hypoaesthesia (reduced sense of touch or sensation)
Peripheral coldness

60+:

Asthenia (weakness)
Chest discomfort
Insomnia (sleeplessness)
Lethargy (tiredness)
Mental impairment (a condition affecting the body, perhaps through sight or hearing loss, a mobility difficulty or a health condition)
Motion sickness (travel sickness)
Nausea (feeling of having an urge to vomit)
Nervousness
Oropharyngeal pain
Pain in jaw

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): 9 people, 81.82%
Weakness: 1 person, 9.09%
Sleep Disorder: 1 person, 9.09%
Peripheral Sensory Neuropathy (damage to one or more of your peripheral nerves): 1 person, 9.09%
Pain: 1 person, 9.09%
Overdose: 1 person, 9.09%
Myasthenia Gravis (a chronic condition that causes muscles to tire and weaken easily): 1 person, 9.09%
Migraine (headache): 1 person, 9.09%
Bladder Spasm: 1 person, 9.09%
Abdominal Pain: 1 person, 9.09%

* Approximation only. Some reports may have incomplete information.

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