Doxycycline and Monocyte count increased - a phase IV clinical study of FDA data

Summary:

Monocyte count increased is reported as a side effect among people who take Doxycycline (doxycycline hyclate), especially for people who are male, 30-39 old, have been taking the drug for < 1 month also take Tylenol, and have Pain.

The phase IV clinical study analyzes which people have Monocyte count increased when taking Doxycycline. It is created by eHealthMe based on reports of 57,458 people who have side effects when taking Doxycycline from the FDA, and is updated regularly.

What is Doxycycline?

Doxycycline has active ingredients of doxycycline hyclate. It is often used in acne. eHealthMe is studying from 60,868 Doxycycline users. Check the latest studies of Doxycycline.

What is Monocyte count increased?

Monocyte count increased is found to be associated with 602 drugs and 690 conditions by eHealthMe. Check the latest studies of Monocyte count increased.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 21, 2026

57,458 people reported to have side effects when taking Doxycycline.
Among them, 22 people (0.04%) have Monocyte count increased.

Could Doxycycline cause Monocyte count increased?

Among these 22 people:

How long have people been on Doxycycline when they have Monocyte count increased? *

What is the gender of people who have Monocyte count increased when taking Doxycycline? *

female: 21.05 %
male: 78.95 %

What is the age of people who have Monocyte count increased when taking Doxycycline? *

What are other drugs people take besides Doxycycline? *

What are other side effects people have besides Monocyte count increased? *

Haemoglobin Decreased: 13 people, 59.09%
Weight Decreased: 12 people, 54.55%
Fatigue (feeling of tiredness): 9 people, 40.91%
Nausea (feeling of having an urge to vomit): 9 people, 40.91%
Cough: 9 people, 40.91%
Lymphocyte Count Decreased: 9 people, 40.91%
Stress And Anxiety: 9 people, 40.91%
Joint Pain: 9 people, 40.91%
Haemorrhoids (a swollen vein or group of veins in the region of the anus): 9 people, 40.91%
Abdominal Discomfort: 8 people, 36.36%

What are the existing conditions these people have? *

Vasculitis (inflammation of a blood vessel or blood vessels): 4 people, 18.18%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 4 people, 18.18%
Pain: 4 people, 18.18%
Chronic Lymphocytic Leukaemia (cancer in which the bone marrow makes too many lymphocytes (a type of white blood cell)): 3 people, 13.64%
Lyme Disease (a bacterial infection that is spread to humans by infected ticks): 2 people, 9.09%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 2 people, 9.09%
Hepatitis C: 2 people, 9.09%
Schizophrenia (a mental disorder characterized by a breakdown of thought processes): 2 people, 9.09%
Muscle Spasms (muscle contraction): 1 person, 4.55%
Muscle Rigidity (muscle stiffness): 1 person, 4.55%

* Approximation only. Some reports may have incomplete information.

Do you take Doxycycline and have Monocyte count increased?

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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Doxycycline:

Doxycycline (60,868 reports)

Browse all side effects of Doxycycline:

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 Monocyte count increased:

Monocyte count increased (602 drugs)

Browse all the conditions that are associated with Monocyte count increased:

Monocyte count increased (690 conditions)

How the study uses the data?

The study uses data from the FDA. It is based on doxycycline hyclate (the active ingredients of Doxycycline) and Doxycycline (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.