Dayquil and Paroxysmal supraventricular tachycardia - a phase IV clinical study of FDA data


Paroxysmal supraventricular tachycardia is found among people who take Dayquil, especially for people who are male, .

The phase IV clinical study analyzes which people take Dayquil and have Paroxysmal supraventricular tachycardia. It is created by eHealthMe based on reports of 1,403 people who have side effects when taking Dayquil from the FDA, and is updated regularly. You can use the study as a second opinion to make health care decisions.

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 Sep, 15, 2023

1,403 people reported to have side effects when taking Dayquil.
Among them, 6 people (0.43%) have Paroxysmal supraventricular tachycardia.

What is Dayquil?

Dayquil has active ingredients of acetaminophen; dextromethorphan; pseudoephedrine. It is often used in cold symptoms. eHealthMe is studying from 1,492 Dayquil users for its effectiveness, alternative drugs and more.

What is Paroxysmal supraventricular tachycardia?

Paroxysmal supraventricular tachycardia is found to be associated with 2,455 drugs and 1,792 conditions by eHealthMe.

Number of Dayquil and Paroxysmal supraventricular tachycardia reports submitted per year:

Could Dayquil cause Paroxysmal supraventricular tachycardia?

Gender of people who have Paroxysmal supraventricular tachycardia when taking Dayquil *:

  • female: 0.0 %
  • male: 100 %

Common drugs people take besides Dayquil *:

  1. Zithromax: 6 people, 100.00%
  2. Pepcid: 6 people, 100.00%
  3. Paxil: 6 people, 100.00%
  4. Motrin: 6 people, 100.00%
  5. Digoxin: 6 people, 100.00%
  6. Colace: 6 people, 100.00%
  7. Chlorothiazide: 6 people, 100.00%
  8. Aleve: 6 people, 100.00%
  9. Tylenol: 5 people, 83.33%
  10. Prevacid: 2 people, 33.33%

Common side effects people have besides Paroxysmal supraventricular tachycardia *:

  1. Ventricular Hypertrophy (enlargement of ventricles (lower chambers) in the heart): 6 people, 100.00%
  2. Ventricular Dysfunction (heart dysfunction): 6 people, 100.00%
  3. Hepatitis A Antibody Positive: 6 people, 100.00%
  4. Hepatic Necrosis (large portions of liver die off due to severe liver disease): 6 people, 100.00%
  5. Hepatic Infarction (particular area of the liver has lost its blood supply and died): 6 people, 100.00%
  6. Hepatic Failure (liver failure): 6 people, 100.00%
  7. Dysmorphism (difference of body structure that is suggestive of a congenital disorder): 6 people, 100.00%
  8. Drug Exposure During Pregnancy: 6 people, 100.00%
  9. Diastolic Dysfunction: 6 people, 100.00%
  10. Diaphragmatic Hernia (defect or hole in the diaphragm that allows the abdominal contents to move into the chest cavity): 6 people, 100.00%

Common conditions people have *:

  1. Stress And Anxiety: 6 people, 100.00%
  2. Panic Disorder: 6 people, 100.00%
  3. Pain: 6 people, 100.00%
  4. Constipation: 6 people, 100.00%
  5. Birth Control: 3 people, 50.00%
  6. Cardiac Disorder: 1 person, 16.67%

* Approximation only. Some reports may have incomplete information.

Do you take Dayquil and have Paroxysmal supraventricular tachycardia?

Check whether Paroxysmal supraventricular tachycardia 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 Paroxysmal supraventricular tachycardia and when was it recovered:

Expand to all the drugs that have ingredients of acetaminophen; dextromethorphan; pseudoephedrine:

Alternative drugs to, pros and cons of Dayquil:

Common Dayquil side effects:

Browse all side effects of Dayquil:

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Paroxysmal supraventricular tachycardia treatments and more:

COVID vaccines that are related to Paroxysmal supraventricular tachycardia:

Common drugs associated with Paroxysmal supraventricular tachycardia:

All the drugs that are associated with Paroxysmal supraventricular tachycardia:

Common conditions associated with Paroxysmal supraventricular tachycardia:

All the conditions that are associated with Paroxysmal supraventricular tachycardia:

How the study uses the data?

The study uses data from the FDA. It is based on acetaminophen; dextromethorphan; pseudoephedrine (the active ingredients of Dayquil) and Dayquil (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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