Regitine and Viagra drug interactions - a phase IV clinical study of FDA data
Summary:
The phase IV clinical study analyzes what interactions people have when they take Regitine and Viagra. It is created by eHealthMe based on reports of 2 people who take the same drugs from the FDA, and is updated regularly.
What is Regitine?
Regitine has active ingredients of phentolamine mesylate. eHealthMe is studying from 61 Regitine users. Check the latest studies of Regitine.
What is Viagra?
Viagra has active ingredients of sildenafil citrate. It is often used in erection problems. eHealthMe is studying from 63,865 Viagra users. Check the latest studies of Viagra.
2 people who take Regitine and Viagra together, and have interactions are studied.

What are the common drug interactions of Regitine and Viagra, by gender? *:
female:
n/a
male:
- Blue vision
- Drug effect decreased
- Eye haemorrhage (bleeding in the eye)
- Eyeball rupture
- Headache (pain in head)
- Priapism (prolonged and painful erection that can last from several hours up to a few days)
What are the common drug interactions of Regitine and Viagra, 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:
- Blue vision
- Drug effect decreased
- Headache (pain in head)
- Priapism (prolonged and painful erection that can last from several hours up to a few days)
50-59:
- Eye haemorrhage (bleeding in the eye)
- Eyeball rupture
60+:
n/a
* Approximation only. Some reports may have incomplete information.
Do you take Regitine and Viagra?
- 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 Regitine and Viagra:
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 zBrowse all side effects of Regitine:
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 zBrowse all side effects of Viagra:
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 zBrowse all interactions between Regitine 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 zBrowse all interactions between Viagra 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 zRelated publications that referenced our studies
- Jeong SY, Jeon SJ, Kim YR, Choi SS, Kwak HS, "A Rare Case of Viagra Induced Toxic Encephalopathy", Investigative Magnetic Resonance Imaging, 2016 Sep .
- Jeong SY, Jeon SJ, Kim YR, Choi SS, Kwak HS, "A Rare Case of Viagra Induced Toxic Encephalopathy", Investigative Magnetic Resonance Imaging, 2016 Sep .
How the study uses the data?
The study uses data from the FDA. It is based on phentolamine mesylate and sildenafil citrate (the active ingredients of Regitine and Viagra, respectively), and Regitine and Viagra (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.
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