Arimidex and Formication - a phase IV clinical study of FDA data

Summary:

Formication is reported as a side effect among people who take Arimidex (anastrozole), especially for people who are female, 60+ old, have been taking the drug for 6 - 12 months also take Lipitor, and have Cardiac disorder.

The phase IV clinical study analyzes which people have Formication when taking Arimidex. It is created by eHealthMe based on reports of 21,680 people who have side effects when taking Arimidex from the FDA, and is updated regularly.

What is Arimidex?

Arimidex has active ingredients of anastrozole. It is often used in breast cancer. eHealthMe is studying from 22,642 Arimidex users. Check the latest studies of Arimidex.

What is Formication?

Formication (a sensation that exactly resembles that of small insects crawling on (or under) the skin) is found to be associated with 559 drugs and 916 conditions by eHealthMe. Check the latest studies of Formication.

On Jan, 24, 2026

21,680 people reported to have side effects when taking Arimidex.
Among them, 12 people (0.06%) have Formication.

Among these 12 people:

How long have people been on Arimidex when they have Formication? *

What is the gender of people who have Formication when taking Arimidex? *

female: 100 %
male: 0.0 %

What is the age of people who have Formication when taking Arimidex? *

What are other drugs people take besides Arimidex? *

What are other side effects people have besides Formication? *

Joint Pain: 6 people, 50.00%
Back Pain: 5 people, 41.67%
Rashes (redness): 5 people, 41.67%
Fatigue (feeling of tiredness): 5 people, 41.67%
Insomnia (sleeplessness): 5 people, 41.67%
Joint Stiffness: 4 people, 33.33%
Oral Mucosal Exfoliation (removal of mucous membrane of mouth): 4 people, 33.33%
Nausea (feeling of having an urge to vomit): 4 people, 33.33%
Muscle Twitching: 4 people, 33.33%
Muscle Spasms (muscle contraction): 4 people, 33.33%

What are the existing conditions these people have? *

Transient Ischaemic Attack (a transient episode of neurologic dysfunction caused by ischemia (loss of blood flow)): 1 person, 8.33%
Stroke (sudden death of a portion of the brain cells due to a lack of oxygen): 1 person, 8.33%
Sleep Disorder: 1 person, 8.33%
Parkinson's Disease: 1 person, 8.33%
Lung Cancer - Non-Small Cell (lung cancer): 1 person, 8.33%
Kidney Stones: 1 person, 8.33%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 1 person, 8.33%
Heart Rate Irregular: 1 person, 8.33%
Depression: 1 person, 8.33%
Cardiac Disorder: 1 person, 8.33%

* Approximation only. Some reports may have incomplete information.

Do you take Arimidex and have Formication?

- Check whether Formication 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 Arimidex:

Arimidex (22,642 reports)

Formication treatments and more:

Formication (8,246 reports)

Browse all side effects of Arimidex:

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 Formication:

Formication (559 drugs)

Browse all the conditions that are associated with Formication:

Formication (916 conditions)

Drugs similar to Arimidex and Formication :

Related publications that referenced our studies

Manjunatha N, Ganjekar S, Mahendra JV, Kilara N, Srinivasa R, "Tardive Dyskinesia Associated With Anastrozole", The Journal of neuropsychiatry and clinical neurosciences, 2013 Jan .
Manjunatha N, Ganjekar S, Mahendra JV, Kilara N, Srinivasa R, "Tardive Dyskinesia Associated With Anastrozole", The Journal of neuropsychiatry and clinical neurosciences, 2013 Jan .

How the study uses the data?

The study uses data from the FDA. It is based on anastrozole (the active ingredients of Arimidex) and Arimidex (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.