1. Home
  2. Analysis
  3. Definity
  4. Ranitidine

Definity and Ranitidine drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Definity (perflutren) and Ranitidine (ranitidine). Common drug interactions include back pain among females and erythema among males.

The phase IV clinical study analyzes what interactions people have when they take Definity and Ranitidine. It is created by eHealthMe based on reports of 13 people who take the same drugs from the FDA, and is updated regularly.

What is Definity?

Definity has active ingredients of perflutren. eHealthMe is studying from 4,853 Definity users. Check the latest studies of Definity.

What is Ranitidine?

Ranitidine has active ingredients of ranitidine. It is often used in gastroesophageal reflux disease. eHealthMe is studying from 234,475 Ranitidine users. Check the latest studies of Ranitidine.

On Jul, 25, 2026

13 people who take Definity and Ranitidine together, and have interactions are studied.

Definity and Ranitidine drug interactions.

What are the common drug interactions of Definity and Ranitidine, by gender? *:

female:

  1. Back pain
  2. Headache (pain in head)
  3. Anaphylactic shock (severe and rapid and sometimes fatal hypersensitivity reaction to a substance)
  4. Blood pressure decreased
  5. Blood pressure increased
  6. Chills (felling of cold)
  7. Dizziness
  8. Dyspnoea (difficult or laboured respiration)
  9. Fatigue (feeling of tiredness)
  10. Feeling hot

male:

  1. Erythema (redness of the skin)
  2. Nodule (a growth of abnormal tissue)
  3. Electrocardiogram st segment elevation
  4. Hypotension (abnormally low blood pressure)
  5. Hypoxia (low oxygen in tissues)
  6. Loss of consciousness
  7. Nausea (feeling of having an urge to vomit)
  8. Pharyngeal oedema (abnormal accumulation of fluid in the cavities and intercellular spaces of the pharyngeal)
  9. Pruritus (severe itching of the skin)
  10. Rash generalised (rash on most of body parts)

What are the common drug interactions of Definity and Ranitidine, by age (0-1 to 60+)? *:

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

  1. Anaphylactic reaction (serious allergic reaction)

40-49:

  1. Anaphylactic shock (severe and rapid and sometimes fatal hypersensitivity reaction to a substance)

50-59:

n/a

60+:

  1. Back pain
  2. Erythema (redness of the skin)
  3. Cardiac arrest
  4. Dyspnoea (difficult or laboured respiration)
  5. Electrocardiogram st segment elevation
  6. Hypotension (abnormally low blood pressure)
  7. Hypoxia (low oxygen in tissues)
  8. Infusion related reaction
  9. Loss of consciousness
  10. Nausea (feeling of having an urge to vomit)

What are the existing conditions these people have? *

  1. Osteoporosis (bones weak and more likely to break): 1 person, 7.69%

* Approximation only. Some reports may have incomplete information.

Do you take Definity and Ranitidine?

- Personalize this study to your gender, age, symptoms and drugs
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously

Related studies:

Effectiveness of, side effects of, and alternative drugs to the 2 drugs:

Browse all drug interactions of Definity and Ranitidine:

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

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 Definity:

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 side effects of Ranitidine:

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 interactions between Definity and drugs from A to Z:

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 interactions between Ranitidine and drugs from A to Z:

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

How the study uses the data?

The study uses data from the FDA. It is based on perflutren and ranitidine (the active ingredients of Definity and Ranitidine, respectively), and Definity and Ranitidine (the brand names). 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.

Recent studies on eHealthMe:

© 2026 eHealthMe.com. All rights reserved. Use of this site constitutes acceptance of eHealthMe.com's terms of service and privacy policy.