Sudafed and Topamax drug interactions - a phase IV clinical study of FDA data
Summary:
Drug interactions are reported among people who take Sudafed (pseudoephedrine hydrochloride) and Topamax (topiramate). Common drug interactions include decreased immune responsiveness among females and sinusitis among males.
The phase IV clinical study analyzes what interactions people have when they take Sudafed and Topamax. It is created by eHealthMe based on reports of 160 people who take the same drugs from the FDA, and is updated regularly.
What is Sudafed?
Sudafed has active ingredients of pseudoephedrine hydrochloride. It is often used in nasal congestion. eHealthMe is studying from 12,944 Sudafed users. Check the latest studies of Sudafed.
What is Topamax?
Topamax has active ingredients of topiramate. It is often used in migraine. eHealthMe is studying from 58,956 Topamax users. Check the latest studies of Topamax.
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 >>>.
160 people who take Sudafed and Topamax together, and have interactions are studied.

What are the common drug interactions of Sudafed and Topamax, by gender? *
What are the common drug interactions of Sudafed and Topamax, by age (0-1 to 60+)? *
What are the existing conditions these people have? *
* Approximation only. Some reports may have incomplete information.
Do you take Sudafed and Topamax?
- Personalize this study to your gender, age, symptoms and drugs
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously
Related studies:
Effectiveness of, side effects of, and alternative drugs to the 2 drugs:
Browse all drug interactions of Sudafed and Topamax:
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 zSub-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 Sudafed:
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 zBrowse all side effects of Topamax:
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 zBrowse all interactions between Sudafed 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 zBrowse all interactions between Topamax 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 zRelated publications that referenced our studies
- Baloch M, Siddiqui MA, "Topiramate induced sudden loss of vision", JPMA, 2012 Oct .
- Kocamaz, M., & Karadag, O., "Topiramate-Induced Acute Myopia, Diplopia, and Photosensitivity: A Case Report", Beyoglu Eye Journal, 2019 Jan .
- Baloch M, Siddiqui MA, "Topiramate induced sudden loss of vision", JPMA, 2012 Oct .
- Kocamaz, M., & Karadag, O., "Topiramate-Induced Acute Myopia, Diplopia, and Photosensitivity: A Case Report", Beyoglu Eye Journal, 2019 Jan .
How the study uses the data?
The study uses data from the FDA. It is based on pseudoephedrine hydrochloride and topiramate (the active ingredients of Sudafed and Topamax, respectively), and Sudafed and Topamax (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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