Qualaquin and Drug hypersensitivity - a phase IV clinical study of FDA data

Summary:

Drug hypersensitivity is reported as a side effect among people who take Qualaquin (quinine sulfate), especially for people who are female, 60+ old, have been taking the drug for 6 - 12 months also take Quinine Sulfate, and have Muscle spasms.

The phase IV clinical study analyzes which people have Drug hypersensitivity when taking Qualaquin. It is created by eHealthMe based on reports of 252 people who have side effects when taking Qualaquin from the FDA, and is updated regularly.

What is Qualaquin?

Qualaquin has active ingredients of quinine sulfate. It is often used in leg pain. eHealthMe is studying from 281 Qualaquin users. Check the latest studies of Qualaquin.

What is Drug hypersensitivity?

Drug hypersensitivity is found to be associated with 2,480 drugs and 2,340 conditions by eHealthMe. Check the latest studies of Drug hypersensitivity.

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 >>>.

On Aug, 28, 2026

252 people reported to have side effects when taking Qualaquin.
Among them, 21 people (8.33%) have Drug hypersensitivity.

Could Qualaquin cause Drug hypersensitivity?

Among these 21 people:

How long have people been on Qualaquin when they have Drug hypersensitivity? *

What is the gender of people who have Drug hypersensitivity when taking Qualaquin? *

female: 80 %
male: 20 %

What is the age of people who have Drug hypersensitivity when taking Qualaquin? *

What are other drugs people take besides Qualaquin? *

What are other side effects people have besides Drug hypersensitivity? *

Pain: 13 people, 61.90%
Bleeding Disorders: 6 people, 28.57%
Idiopathic Thrombocytopenic Purpura (bleeding disorder in which the immune system destroys platelets, which are necessary for normal blood clotting): 5 people, 23.81%
Nervousness: 5 people, 23.81%
Haemorrhage (bleeding): 5 people, 23.81%
Stress And Anxiety: 5 people, 23.81%
Abdominal Pain: 4 people, 19.05%
Nausea (feeling of having an urge to vomit): 4 people, 19.05%
Thrombotic Thrombocytopenic Purpura (a rare blood disorder characterized by clotting in small blood vessels of the body): 4 people, 19.05%
Fear: 4 people, 19.05%

What are the existing conditions these people have? *

Muscle Spasms (muscle contraction): 14 people, 66.67%
Myelodysplastic Syndrome (a group of conditions that occur when the blood-forming cells in the bone marrow are damaged): 1 person, 4.76%
Immunodeficiency Common Variable: 1 person, 4.76%
Hypogammaglobulinaemia (an abnormally low concentration of gamma globulin in the blood and increased risk of infection): 1 person, 4.76%

* Approximation only. Some reports may have incomplete information.

Do you take Qualaquin and have Drug hypersensitivity?

- Check whether Drug hypersensitivity 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 Qualaquin:

Qualaquin (281 reports)

Browse all side effects of Qualaquin:

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 Drug hypersensitivity:

Drug hypersensitivity (2,480 drugs)

Browse all the conditions that are associated with Drug hypersensitivity:

Drug hypersensitivity (2,340 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on quinine sulfate (the active ingredients of Qualaquin) and Qualaquin (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.