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

Summary:

Drug interactions are reported among people who take Finasteride (finasteride) and Firdapse (amifampridine). Common drug interactions include fall among males.

The phase IV clinical study analyzes what interactions people have when they take Finasteride and Firdapse. It is created by eHealthMe based on reports of 18 people who take the same drugs from the FDA, and is updated regularly.

What is Finasteride?

Finasteride has active ingredients of finasteride. It is often used in prostate examination abnormal. eHealthMe is studying from 44,177 Finasteride users. Check the latest studies of Finasteride.

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, 12, 2026

18 people who take Finasteride and Firdapse together, and have interactions are studied.

Finasteride and Firdapse drug interactions.

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

female:

n/a

male:

  1. Fall
  2. Asthenia (weakness)
  3. Hypoaesthesia (reduced sense of touch or sensation)
  4. Hypotension (abnormally low blood pressure)
  5. Atrial fibrillation (fibrillation of the muscles of the atria of the heart)
  6. Diplopia (double vision)
  7. Food interaction
  8. Lethargy (tiredness)
  9. Spinal compression fracture (fracture due to spinal compression on bone)
  10. Abdominal pain upper

What are the common drug interactions of Finasteride 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:

n/a

60+:

  1. Movement disorder (neurological syndromes where they may be excess of movement or a paucity of movement that is not connected to weakness)
  2. Dyspnoea (difficult or laboured respiration)
  3. Productive cough
  4. Transient ischaemic attack (a transient episode of neurologic dysfunction caused by ischemia (loss of blood flow))
  5. Drug ineffective
  6. Asthenia (weakness)
  7. Atelectasis (partial or complete collapse of the lung)
  8. Change of bowel habit
  9. Diverticulum (out pouching of a hollow (or a fluid-filled) structure in the body)
  10. Ejection fraction decreased (systolic heart failure)

What are the existing conditions these people have? *

  1. Lambert-Eaton Syndrome (this means your immune system mistakenly targets healthy cells and tissues in the body): 17 people, 94.44%
  2. Tumor: 1 person, 5.56%
  3. Insomnia (sleeplessness): 1 person, 5.56%
  4. Hair Loss: 1 person, 5.56%

* Approximation only. Some reports may have incomplete information.

Do you take Finasteride and Firdapse?

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Related studies:

Effectiveness of, side effects of, and alternative drugs to the 2 drugs:

Browse all drug interactions of Finasteride and Firdapse:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Finasteride:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all side effects of Firdapse:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all interactions between Finasteride and drugs from A to Z:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all interactions between Firdapse and drugs from A to Z:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Related publications that referenced our studies

How the study uses the data?

The study uses data from the FDA. It is based on finasteride and amifampridine (the active ingredients of Finasteride and Firdapse, respectively), and Finasteride and Firdapse (the brand names). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).

WARNING, DISCLAIMER, USE FOR PUBLICATION

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.

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