Acyclovir and Injection site nodule - a phase IV clinical study of FDA data

Summary:

Injection site nodule is reported as a side effect among people who take Acyclovir (acyclovir), especially for people who are female, 40-49 old, also take Vitamin D3, and have Relapsing-remitting multiple sclerosis.

The phase IV clinical study analyzes which people have Injection site nodule when taking Acyclovir. It is created by eHealthMe based on reports of 53,484 people who have side effects when taking Acyclovir from the FDA, and is updated regularly.

What is Acyclovir?

Acyclovir has active ingredients of acyclovir. It is often used in herpes simplex. eHealthMe is studying from 54,961 Acyclovir users. Check the latest studies of Acyclovir.

What is Injection site nodule?

Injection site nodule (small swelling or aggregation of cells in the body, esp. an abnormal one at injection site) is found to be associated with 426 drugs and 588 conditions by eHealthMe. Check the latest studies of Injection site nodule.

On Jul, 09, 2026

53,484 people reported to have side effects when taking Acyclovir.
Among them, 11 people (0.02%) have Injection site nodule.

Could Acyclovir cause Injection site nodule?

Among these 11 people:

What is the gender of people who have Injection site nodule when taking Acyclovir? *

female: 81.82 %
male: 18.18 %

What is the age of people who have Injection site nodule when taking Acyclovir? *

What are other drugs people take besides Acyclovir? *

What are other side effects people have besides Injection site nodule? *

Itching: 7 people, 63.64%
Abdominal Pain Upper: 6 people, 54.55%
Fatigue (feeling of tiredness): 6 people, 54.55%
Diarrhea: 6 people, 54.55%
Drug Ineffective: 6 people, 54.55%
Urticaria (rash of round, red welts on the skin that itch intensely): 5 people, 45.45%
Meningism (the triad of nuchal rigidity (neck stiffness), photophobia (intolerance of bright light) and headache. it is a sign of irritation of the meninges): 5 people, 45.45%
Irritable Bowel Syndrome: 5 people, 45.45%
Blood Glucose Increased: 5 people, 45.45%
Weakness: 5 people, 45.45%

What are the existing conditions these people have? *

Relapsing-Remitting Multiple Sclerosis (reoccurrence of an inflammatory disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged): 5 people, 45.45%
Psoriasis (immune-mediated disease that affects the skin): 1 person, 9.09%
Insomnia (sleeplessness): 1 person, 9.09%
Hypothyroidism (abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development): 1 person, 9.09%
High Blood Pressure: 1 person, 9.09%
High Blood Cholesterol: 1 person, 9.09%
Herpes Virus Infection: 1 person, 9.09%
Heart Rate Increased: 1 person, 9.09%
Crohn's Disease (a condition that causes inflammation of the gastrointestinal tract): 1 person, 9.09%
Birth Control: 1 person, 9.09%

* Approximation only. Some reports may have incomplete information.

Do you take Acyclovir and have Injection site nodule?

- Check whether Injection site nodule 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 Acyclovir:

Acyclovir (54,961 reports)

Browse all side effects of Acyclovir:

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 Injection site nodule:

Injection site nodule (426 drugs)

Browse all the conditions that are associated with Injection site nodule:

Injection site nodule (588 conditions)

Related publications that referenced our studies

Choi N, Lee JY, Sunwoo JS, Kwon KI, Roh H, Ahn MY, Lee KB, "Hyponatremia during Acyclovir Treatment of Bell’s Palsy", Journal of the Korean Neurological Association, 2017 Aug .
Choi N, Lee JY, Sunwoo JS, Kwon KI, Roh H, Ahn MY, Lee KB, "Hyponatremia during Acyclovir Treatment of Bell’s Palsy", Journal of the Korean Neurological Association, 2017 Aug .

How the study uses the data?

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