Ultracet and Flank pain - a phase IV clinical study of FDA data

Summary:

Flank pain is reported as a side effect among people who take Ultracet (acetaminophen; tramadol hydrochloride), especially for people who are female, 40-49 old, have been taking the drug for < 1 month also take Zometa, and have Metastases to bone.

The phase IV clinical study analyzes which people have Flank pain when taking Ultracet. It is created by eHealthMe based on reports of 6,139 people who have side effects when taking Ultracet from the FDA, and is updated regularly.

What is Ultracet?

Ultracet has active ingredients of acetaminophen; tramadol hydrochloride. It is often used in pain. eHealthMe is studying from 6,351 Ultracet users. Check the latest studies of Ultracet.

What is Flank pain?

Flank pain (a distressing sensation experienced around the lower back and the upper abdomen) is found to be associated with 1,120 drugs and 1,478 conditions by eHealthMe. Check the latest studies of Flank pain.

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 Sep, 01, 2026

6,139 people reported to have side effects when taking Ultracet.
Among them, 16 people (0.26%) have Flank pain.

Among these 16 people:

How long have people been on Ultracet when they have Flank pain? *

What is the gender of people who have Flank pain when taking Ultracet? *

female: 81.25 %
male: 18.75 %

What is the age of people who have Flank pain when taking Ultracet? *

What are other drugs people take besides Ultracet? *

What are other side effects people have besides Flank pain? *

Dyspnea (difficult or laboured breathing): 8 people, 50.00%
Stress And Anxiety: 8 people, 50.00%
Unilateral Hydronephrosis (kidney stone that causes obstruction of the ureter): 8 people, 50.00%
Dizziness: 8 people, 50.00%
Haematuria (presence of blood in urine): 8 people, 50.00%
Diarrhea: 8 people, 50.00%
Gait Disturbance: 7 people, 43.75%
Gastrointestinal Haemorrhage (bleeding gastrointestinal tract): 7 people, 43.75%
Gingival Erosion (gum ulcer): 7 people, 43.75%
Gingival Oedema (swelling of gums): 7 people, 43.75%

What are the existing conditions these people have? *

Breast Cancer: 8 people, 50.00%
Metastases To Bone (cancer spreads to bone): 8 people, 50.00%
Constipation: 7 people, 43.75%
Breast Cancer Metastatic: 7 people, 43.75%
Muscle Spasms (muscle contraction): 7 people, 43.75%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 4 people, 25.00%
Seborrhoeic Keratosis (noncancerous (benign) skin growths that some people develop as they age. they often appear on the back or chest): 2 people, 12.50%
Calculus Urinary (stone in urinary system): 2 people, 12.50%
Chronic Myeloid Leukaemia (long lasting type of cancer that starts in the blood-forming cells of the bone marrow and invades the blood): 2 people, 12.50%
Gastric Ulcer (stomach ulcer): 2 people, 12.50%

* Approximation only. Some reports may have incomplete information.

Do you take Ultracet and have Flank pain?

- Check whether Flank pain 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 Ultracet:

Ultracet (6,351 reports)

Flank pain treatments and more:

Flank pain (12,893 reports)

How severe was Flank pain and when was it recovered:

Flank pain in Ultracet

Expand to all the drugs that have ingredients of acetaminophen; tramadol hydrochloride:

Flank pain and drugs with ingredients of acetaminophen; tramadol hydrochloride

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Ultracet:

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 Flank pain:

Flank pain (1,120 drugs)

Browse all the conditions that are associated with Flank pain:

Flank pain (1,478 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on acetaminophen; tramadol hydrochloride (the active ingredients of Ultracet) and Ultracet (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.