Firdapse and Acne - a phase IV clinical study of FDA data


Acne is reported only by a few people who take Firdapse.

The phase IV clinical study analyzes which people take Firdapse and have Acne. It is created by eHealthMe based on reports of 1,435 people who have side effects while taking Firdapse from the FDA, and is updated regularly.

Phase IV trials are used to detect adverse drug outcomes and monitor drug effectiveness in the real world. With medical big data and AI algorithms, eHealthMe is running millions of phase IV trials and makes the results available to the public. Our original studies have been referenced on 600+ medical publications including The Lancet, Mayo Clinic Proceedings, and Nature.

On Feb, 03, 2023

1,435 people reported to have side effects when taking Firdapse.
Among them, 2 people (0.14%) have Acne.

What is Firdapse?

Firdapse has active ingredients of amifampridine. eHealthMe is studying from 1,435 Firdapse users for its effectiveness, alternative drugs and more.

What is Acne?

Acne (skin problems that cause pimples) is found to be associated with 2,777 drugs and 2,183 conditions by eHealthMe.

Number of Firdapse and Acne reports submitted per year:

Could Firdapse cause Acne?

Gender of people who have Acne when taking Firdapse *:

  • female: 100 %
  • male: 0.0 %

Age of people who have Acne when taking Firdapse *:

  • 0-1: 0.0 %
  • 2-9: 0.0 %
  • 10-19: 0.0 %
  • 20-29: 0.0 %
  • 30-39: 0.0 %
  • 40-49: 0.0 %
  • 50-59: 0.0 %
  • 60+: 100 %

Common drugs people take besides Firdapse *:

  1. Vitamin B12: 2 people, 100.00%
  2. Pantoprazole: 2 people, 100.00%
  3. Mestinon: 2 people, 100.00%
  4. Lortab: 2 people, 100.00%

Common side effects people have besides Acne *:

  1. Rashes (redness): 2 people, 100.00%
  2. Insomnia (sleeplessness): 1 person, 50.00%
  3. Dizziness: 1 person, 50.00%

Common conditions people have *:

  1. Lambert-Eaton Syndrome (this means your immune system mistakenly targets healthy cells and tissues in the body): 2 people, 100.00%

* Approximation only. Some reports may have incomplete information.

Do you take Firdapse and have Acne?

Check whether Acne is associated with a drug or a condition

How to use the study?

You can discuss the study with your doctor, to ensure that all drug risks and benefits are fully discussed and understood.

Related studies

How severe was Acne and when was it recovered:

Expand to all the drugs that have ingredients of amifampridine:

Alternative drugs to, pros and cons of Firdapse:

Common Firdapse side effects:

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

Acne treatments and more:

  • Acne (164,752 reports)

COVID vaccines that are related to Acne:

Common drugs associated with Acne:

All the drugs that are associated with Acne:

  • Acne (2,777 drugs)

Common conditions associated with Acne:

All the conditions that are associated with Acne:

  • Acne (2,183 conditions)

How the study uses the data?

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

Who is eHealthMe?

With medical big data and proven AI 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 600+ 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: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on 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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