1. Home
  2. Analysis
  3. Caffeine
  4. Alfentanil

Caffeine and Alfentanil drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Caffeine (caffeine) and Alfentanil (alfentanil hydrochloride). Common drug interactions include retinopathy haemorrhagic among females and drug hypersensitivity among males.

The phase IV clinical study analyzes what interactions people have when they take Caffeine and Alfentanil. It is created by eHealthMe based on reports of 14 people who take the same drugs from the FDA, and is updated regularly.

What is Caffeine?

Caffeine has active ingredients of caffeine. It is often used in fatigue. eHealthMe is studying from 6,667 Caffeine users. Check the latest studies of Caffeine.

What is Alfentanil?

Alfentanil has active ingredients of alfentanil hydrochloride. eHealthMe is studying from 1,482 Alfentanil users. Check the latest studies of Alfentanil.

On Jul, 15, 2026

14 people who take Caffeine and Alfentanil together, and have interactions are studied.

Caffeine and Alfentanil drug interactions.

What are the common drug interactions of Caffeine and Alfentanil, by gender? *:

female:

  1. Retinopathy haemorrhagic (acute damage to the retina of the eye with bleeding)
  2. Headache (pain in head)
  3. Nausea (feeling of having an urge to vomit)
  4. Post procedural complication
  5. Blindness

male:

  1. Drug hypersensitivity
  2. Toxic epidermal necrolysis (a rare, life-threatening skin condition that is usually caused by a reaction to drugs causes wide spread skin destruction)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

n/a

40-49:

  1. Retinopathy haemorrhagic (acute damage to the retina of the eye with bleeding)
  2. Headache (pain in head)
  3. Nausea (feeling of having an urge to vomit)
  4. Post procedural complication
  5. Blindness

50-59:

  1. Drug hypersensitivity
  2. Toxic epidermal necrolysis (a rare, life-threatening skin condition that is usually caused by a reaction to drugs causes wide spread skin destruction)

60+:

n/a

What are the existing conditions these people have? *

  1. Schizophrenia (a mental disorder characterized by a breakdown of thought processes): 7 people, 50.00%
  2. Pneumonia: 4 people, 28.57%
  3. Ill-Defined Disorder: 4 people, 28.57%
  4. Erythema Multiforme (a type of hypersensitivity reaction): 4 people, 28.57%
  5. Diabetes: 4 people, 28.57%
  6. Nausea (feeling of having an urge to vomit): 3 people, 21.43%
  7. Headache (pain in head): 3 people, 21.43%
  8. General Anaesthesia: 2 people, 14.29%

* Approximation only. Some reports may have incomplete information.

Do you take Caffeine and Alfentanil?

- 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 Caffeine and Alfentanil:

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 Caffeine:

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 Alfentanil:

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 Caffeine 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 Alfentanil 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 caffeine and alfentanil hydrochloride (the active ingredients of Caffeine and Alfentanil, respectively), and Caffeine and Alfentanil (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.