Nyquil side effects by duration, gender and age - a phase IV clinical study of FDA data
Summary:
Side effects are reported by people who take Nyquil. Common side effects include drug hypersensitivity among females and cough among males.
The phase IV clinical study is created by eHealthMe based on 1,364 reports from the FDA, and is updated regularly. You can use the study as a second opinion to make health care decisions.
With medical big data and AI algorithms, eHealthMe enables everyone to run phase IV clinical trial to detect adverse drug outcomes and monitor effectiveness. Our original studies have been referenced on 600+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Most recently, phase IV clinial trails for COVID 19 vaccines have been added, check here.
1,364 people who take Nyquil and have side effects are studied.
What is Nyquil?
Nyquil has active ingredients of acetaminophen / dextromethorphan / doxylamine / pseudoephedrine. It is often used in common cold. eHealthMe is studying from 1,502 Nyquil users for its effectiveness, alternative drugs and more.
Number of Nyquil reports submitted per year:

Nyquil side effects by time on the drug *:
Nyquil side effects by gender *:
Nyquil side effects by age *:
* Approximation only. Some reports may have incomplete information.
Do you take Nyquil?
Personalize this study to your gender and ageHow 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.
How the study uses the data?
The study is based on acetaminophen / dextromethorphan / doxylamine / pseudoephedrine (the active ingredients of Nyquil) and Nyquil (the brand name). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered.
Related studies
Alternative drugs to, pros and cons of Nyquil:
- Nyquil (1,502 reports)
Common Nyquil side effects:
- Nasopharyngitis (inflammation of the nasopharynx): 108 reports
All Nyquil side effects 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 zWho 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+ 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).
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