Lys and Canker sores - a phase IV clinical study of FDA data

Summary:

Canker sores is reported as a side effect among people who take Lys (lysine), especially for people who are female, 50-59 old, also take Flonase, and have Stress and anxiety.

The phase IV clinical study analyzes which people have Canker sores when taking Lys. It is created by eHealthMe based on reports of 15,985 people who have side effects when taking Lys from the FDA, and is updated regularly.

What is Lys?

Lys has active ingredients of lysine. eHealthMe is studying from 16,532 Lys users. Check the latest studies of Lys.

What is Canker sores?

Canker sores (painful, open sore in the mouth) is found to be associated with 613 drugs and 1,227 conditions by eHealthMe. Check the latest studies of Canker sores.

On Jul, 17, 2026

15,985 people reported to have side effects when taking Lys.
Among them, 16 people (0.1%) have Canker sores.

Among these 16 people:

What is the gender of people who have Canker sores when taking Lys? *

female: 83.33 %
male: 16.67 %

What is the age of people who have Canker sores when taking Lys? *

What are other drugs people take besides Lys? *

Albuterol Sulfate: 7 people, 43.75%
Flonase: 7 people, 43.75%
Vitamin D3: 6 people, 37.50%
Benadryl: 5 people, 31.25%
Clonazepam: 5 people, 31.25%
Pepcid: 4 people, 25.00%
Tylenol: 4 people, 25.00%
Valacyclovir Hydrochloride: 4 people, 25.00%
Omega 3: 3 people, 18.75%
Metolazone: 3 people, 18.75%

What are other side effects people have besides Canker sores? *

Headache (pain in head): 8 people, 50.00%
Cough: 7 people, 43.75%
Fatigue (feeling of tiredness): 6 people, 37.50%
Renal Disorder (kidney disease): 6 people, 37.50%
Head Injury: 6 people, 37.50%
Feeling Abnormal: 6 people, 37.50%
Dizziness: 5 people, 31.25%
White Blood Cell Count Decreased: 4 people, 25.00%
High Blood Pressure: 4 people, 25.00%
Hair Loss: 4 people, 25.00%

What are the existing conditions these people have? *

Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 4 people, 25.00%
Stress And Anxiety: 4 people, 25.00%
Stomatitis (inflammation of mucous membrane of mouth): 3 people, 18.75%
Sleep Disorder: 3 people, 18.75%
Arthritis (form of joint disorder that involves inflammation of one or more joints): 3 people, 18.75%
Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 3 people, 18.75%
Polycythaemia Vera (blood disorder in which the bone marrow makes too many red blood cells): 3 people, 18.75%
Hair Loss: 3 people, 18.75%
Dry Skin: 3 people, 18.75%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 3 people, 18.75%

* Approximation only. Some reports may have incomplete information.

Do you take Lys and have Canker sores?

- Check whether Canker sores is associated with a drug or a condition
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

Effectiveness of, long term effects of, and alternative drugs to Lys:

Lys (16,532 reports)

Canker sores treatments and more:

Canker sores (9,953 reports)

Browse all side effects of Lys:

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 the drugs that are associated with Canker sores:

Canker sores (613 drugs)

Browse all the conditions that are associated with Canker sores:

Canker sores (1,227 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on lysine (the active ingredients of Lys) and Lys (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.

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.