Codeine and Polyneuropathy - a phase IV clinical study of FDA data

Summary:

Polyneuropathy is reported as a side effect among people who take Codeine (codeine sulfate), especially for people who are female, 60+ old, have been taking the drug for < 1 month also take Paracetamol, and have Muscle strain.

The phase IV clinical study analyzes which people have Polyneuropathy when taking Codeine. It is created by eHealthMe based on reports of 41,713 people who have side effects when taking Codeine from the FDA, and is updated regularly.

What is Codeine?

Codeine has active ingredients of codeine sulfate. It is often used in pain. eHealthMe is studying from 42,342 Codeine users. Check the latest studies of Codeine.

What is Polyneuropathy?

Polyneuropathy (neurological disorder that occurs when many peripheral nerves throughout the body malfunction simultaneously) is found to be associated with 933 drugs and 943 conditions by eHealthMe. Check the latest studies of Polyneuropathy.

On Apr, 26, 2026

41,713 people reported to have side effects when taking Codeine.
Among them, 26 people (0.06%) have Polyneuropathy.

Among these 26 people:

How long have people been on Codeine when they have Polyneuropathy? *

What is the gender of people who have Polyneuropathy when taking Codeine? *

female: 62.5 %
male: 37.5 %

What is the age of people who have Polyneuropathy when taking Codeine? *

What are other drugs people take besides Codeine? *

What are other side effects people have besides Polyneuropathy? *

Weakness: 11 people, 42.31%
Diarrhea: 10 people, 38.46%
Gait Disturbance: 7 people, 26.92%
Anaemia (lack of blood): 7 people, 26.92%
Fall: 7 people, 26.92%
Insomnia (sleeplessness): 6 people, 23.08%
Stress And Anxiety: 6 people, 23.08%
Joint Pain: 6 people, 23.08%
Weight Decreased: 6 people, 23.08%
Fatigue (feeling of tiredness): 6 people, 23.08%

What are the existing conditions these people have? *

Cough: 5 people, 19.23%
Parkinson's Disease: 5 people, 19.23%
Lung Cancer - Non-Small Cell (lung cancer): 5 people, 19.23%
Muscle Strain (an injury to a muscle in which the muscle fibres tear): 5 people, 19.23%
Osteoarthritis (a joint disease caused by cartilage loss in a joint): 4 people, 15.38%
Constipation: 4 people, 15.38%
Abnormal Faeces (abnormal stool): 4 people, 15.38%
Oesophageal Adenocarcinoma (a cancer tumour of an epithelium in oesophagus): 3 people, 11.54%
Anaemia (lack of blood): 3 people, 11.54%
Bone Pain: 3 people, 11.54%

* Approximation only. Some reports may have incomplete information.

Do you take Codeine and have Polyneuropathy?

- Check whether Polyneuropathy 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 Codeine:

Codeine (42,342 reports)

Polyneuropathy treatments and more:

Polyneuropathy (17,901 reports)

Browse all side effects of Codeine:

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 Polyneuropathy:

Polyneuropathy (933 drugs)

Browse all the conditions that are associated with Polyneuropathy:

Polyneuropathy (943 conditions)

How the study uses the data?

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