Thomas O'Connor, MD

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Thomas O'Connor, MD I'm a board certified Internist specializing in Testosteronology® and Anabolic Recovery Medicine®

I keep a limited number of patients as a private physician to ensure you will get close monitoring of your TRT or anabolic recovery treatment. Board Certified MD
Services include:
- Testosterone Replacement Therapy
- Anabolic Steroid Recovery

10/15/2026

High hematocrit on TRT does not automatically mean you need to take aspirin.

In this video, Dr. Thomas O’Connor addresses a common assumption among men on testosterone: if TRT raises your red blood cells or hematocrit, should you start taking a daily baby aspirin to reduce the risk of a blood clot?

Dr. O’Connor explains why the answer is more complicated. Testosterone can cause androgen-induced erythrocytosis, but that is not the same condition as polycythemia vera. Treating the two as though they are interchangeable can lead to inappropriate conclusions about aspirin use.

He also explains when low-dose aspirin may have a legitimate cardiovascular role, including in certain people with established coronary artery disease, and why taking aspirin without a clear indication can create its own risks, including gastrointestinal and hemorrhagic bleeding.

The bigger lesson is that men on testosterone need to understand more than just their testosterone level. Hemoglobin, hematocrit, cardiovascular history, blood pressure, clotting risk, iron status, and other health factors all help determine what those laboratory numbers actually mean.

That is exactly why the Testosteronology® Health Portal was created.

Learn more about the Testosteronology® Health Portal:
https://testosteronology.com

And if you have a testosterone or steroid health question for Dr. O’Connor, bring it directly to him.

Join our YouTube and Facebook livestream Wednesdays at 7pm on YouTube/Facebook for a LIVE Q&A session with Dr. Thomas O’Connor.

Register free:
https://testosteronology.com/live



Educational content only. This video is not intended to diagnose, treat, prescribe, or replace individualized medical care from your healthcare provider.

Are social media trends pushing men to risk their long-term health in pursuit of the perfect physique?READ THE FULL ARTI...
10/14/2026

Are social media trends pushing men to risk their long-term health in pursuit of the perfect physique?

READ THE FULL ARTICLE:
https://testosteronologysociety.com/articles

The growing popularity of “looksmaxxing,” testosterone optimization, anabolic steroids, and experimental peptides is raising serious concerns about men's health.

From cardiovascular complications and infertility to hormonal disruption and the unknown risks of unapproved peptides, the pursuit of greater muscle mass, sexual performance, and physical attractiveness can come at a significant medical cost.

In this new article, the Testosteronology Society® examines how social media is reshaping expectations of modern masculinity, why higher testosterone doesn't necessarily mean better health, and why informed medical care and harm reduction are more important than ever.

Founded by Dr. Thomas O'Connor, the Testosteronology Society® is committed to advancing clinical education on testosterone therapy, anabolic steroid complications, and the evolving challenges facing men's health professionals.



Educational purposes only; does not create a doctor-patient relationship.

10/14/2026

If gynecomastia develops while you are on testosterone, should you try to control it with an aromatase inhibitor, or is surgery the better option once a true mass has formed?

In this video, Dr. Thomas O’Connor responds to a man who has been on approximately 100 mg of testosterone per week for eight years and developed gynecomastia on one side.

Dr. O’Connor explains why the first priority with any new breast mass is making sure it has been properly evaluated rather than simply assuming it is gynecomastia. He then discusses the difference between excess chest fat and a true fibrotic gynecomastia mass, why an experienced gynecomastia surgeon matters, and why he strongly disagrees with keeping men on aromatase inhibitors, tamoxifen, or raloxifene in an attempt to shrink established tissue.

He also explains why aggressively suppressing estrogen can affect the central nervous system, heart, joints, and overall well-being while failing to address a hardened gynecomastia mass.

The larger lesson is that men on testosterone need to understand what is actually happening in their bodies rather than automatically treating every symptom by adding another medication.

That is part of the mission of the Testosteronology® Health Portal: Helping Men on Testosterone Maximize Results and Protect Their Long-Term Health.

No matter who prescribes your TRT, learn what to track, what to watch for, and how testosterone may affect your strength, performance, heart, kidneys, blood pressure, sleep, sexual health, and other areas that can shape your long-term health.

Learn more:
https://testosteronology.com

Have a testosterone or steroid health question for Dr. O’Connor?

Join our YouTube and Facebook livestream Wednesdays at 7pm on YouTube/Facebook for a LIVE Q&A session with Dr. Thomas O’Connor.

Register free:
https://testosteronology.com/live



Educational content only. This video is not intended to diagnose, treat, prescribe, or replace individualized medical care from your healthcare provider.

10/13/2026

In this video, Dr. Thomas O’Connor explains where enclomiphene and clomiphene may fit for men with low testosterone who are not ready to begin testosterone injections or who want to preserve fertility.

Unlike taking testosterone from outside the body, enclomiphene works through the brain and pituitary system to increase LH and FSH, encouraging the te**es to produce more of their own testosterone. Dr. O’Connor explains why laboratory testosterone levels can sometimes rise dramatically while the way a man actually feels does not improve to the same degree.

He also discusses the difference between clomiphene and enclomiphene, their potential role in fertility and post-cycle recovery, and why some men ultimately decide to transition to testosterone therapy.

The discussion also addresses an important limitation: long-term data are limited. Some men may eventually feel less benefit, experience unwanted effects, or simply decide that the treatment is not providing the quality-of-life improvement they expected. Dr. O’Connor is also particularly cautious about this approach in men with significant anxiety or depression based on what he has observed clinically.

That is the mission of the Testosteronology® Health Portal: Helping Men on Testosterone Maximize Results and Protect Their Long-Term Health.

Learn more:
https://testosteronology.com

Have a testosterone or steroid health question for Dr. O’Connor?

Join our YouTube and Facebook livestream Wednesdays at 7pm on YouTube/Facebook for a LIVE Q&A session with Dr. Thomas O’Connor.

Register free:
https://testosteronology.com/live



Educational content only. This video is not intended to diagnose, treat, prescribe, or replace individualized medical care from your healthcare provider.

10/12/2026

In this video, Dr. Thomas O’Connor responds to a 26-year-old man using 350 mg of testosterone along with tadalafil, rosuvastatin, nebivolol, and telmisartan who asks whether he can stay on that regimen as long as his cardiac markers remain favorable.

Dr. O’Connor explains why good laboratory results are only one part of the picture. At 26 years old, he wants to know why this man needs multiple cardiovascular medications, what his blood pressure looks like outside the doctor’s office, and whether the testosterone dose itself is creating unnecessary long-term risk.

The larger point is that “my labs look good” should not become permission to ignore the total amount of androgen exposure or the number of medications needed to keep other health markers under control.

That is the mission of the Testosteronology® Health Portal: Helping Men on Testosterone Maximize Results and Protect Their Long-Term Health.

No matter who prescribes your TRT, Dr. Thomas O’Connor wants men to understand what to track, what to watch for, and how testosterone can affect blood pressure, cardiovascular health, kidney health, sexual function, metabolic health, and the other factors that shape long-term outcomes.

Learn more:
https://testosteronology.com

Have a testosterone or steroid health question for Dr. O’Connor?

Join our YouTube and Facebook livestream Wednesdays at 7pm on YouTube/Facebook for a LIVE Q&A session with Dr. Thomas O’Connor.

Register free:
https://testosteronology.com/live



Educational content only. This video is not intended to diagnose, treat, prescribe, or replace individualized medical care from your healthcare provider.

10/12/2026

Questions about testosterone or steroid use?

Bring them to Dr. Thomas O’Connor’s livestream on Wednesdays and he will give you direct answers to your questions! Details and Register at https://testosteronology.com/live.

10/12/2026

If gynecomastia develops while you are on testosterone, should you treat it with an aromatase inhibitor, or is surgery the better option once a true mass has formed?

Have a testosterone or steroid health question for Dr. O’Connor?
Join our YouTube and Facebook livestream Wednesdays at 7pm on YouTube/Facebook for a LIVE Q&A session with Dr. Thomas O’Connor.

Register free: https://testosteronology.com/live

In this video, Dr. Thomas O’Connor responds to a man who developed one-sided gynecomastia after eight years on approximately 100 mg of testosterone per week.

Dr. O’Connor explains why any new breast mass requires proper medical evaluation before assuming it is gynecomastia. He discusses the difference between chest fat and true fibrotic gynecomastia, when surgery may be appropriate, and why choosing an experienced gynecomastia surgeon matters.

He also explains why he opposes prolonged use of aromatase inhibitors, tamoxifen, or raloxifene to treat established fibrotic tissue. Suppressing estrogen unnecessarily can negatively affect the brain, heart, joints, and overall well-being without resolving the underlying problem.

The key message: Men on TRT need to understand the cause of their symptoms rather than automatically adding medications.

Dr. Thomas O’Connor's Testosteronology® Health Portal is dedicated to Helping Men on Testosterone Maximize Results and Protect Their Long-Term Health.

Learn more:
https://testosteronology.com



Educational purposes only. This content does not establish a doctor-patient relationship or replace individualized medical advice, diagnosis, or treatment.

10/11/2026

High hematocrit on TRT does not automatically mean you need aspirin.

In this video, Dr. Thomas O’Connor addresses a common question among men on testosterone: If TRT raises your red blood cells or hematocrit, should you take a daily baby aspirin to reduce blood clot risk?

Dr. O’Connor explains why testosterone-induced erythrocytosis is not the same as polycythemia vera and why confusing these conditions can lead to inappropriate aspirin use.

He discusses when low-dose aspirin may be appropriate for certain cardiovascular conditions and why unnecessary aspirin use can increase the risk of gastrointestinal and other serious bleeding.

Men on TRT need to understand more than testosterone levels. Hemoglobin, hematocrit, blood pressure, cardiovascular history, clotting risk, and iron status all matter when evaluating long-term health.

Dr. Thomas O’Connor created the Testosteronology® Health Portal to help men on testosterone maximize results while protecting their long-term health.

Learn more:
https://testosteronology.com

Have a testosterone or steroid health question for Dr. O’Connor?

Join our YouTube and Facebook livestream Wednesdays at 7pm on YouTube/Facebook for a LIVE Q&A session with Dr. Thomas O’Connor.

Register free:
https://testosteronology.com/live



Educational purposes only. This content does not establish a doctor-patient relationship or replace individualized medical advice, diagnosis, or treatment.

Steroids, peptides, SARMs, and other performance-enhancing drugs are changing faster than healthcare can keep up. Are cl...
10/09/2026

Steroids, peptides, SARMs, and other performance-enhancing drugs are changing faster than healthcare can keep up. Are clinicians prepared to manage the potential health consequences?

A new scientific commentary published in Addiction examines how harm reduction must evolve as more individuals turn to anabolic steroids, experimental peptides, and combinations of performance-enhancing substances. From uncertain product quality and drug stacking to cardiovascular risks and unknown long-term effects, these emerging trends present serious challenges for healthcare professionals.

The Testosteronology Society®, founded by Dr. Thomas O'Connor, M.D., believes that protecting patients requires more than routine blood tests and testosterone monitoring. Clinicians need specialized knowledge, comprehensive medical assessments, and a nonjudgmental approach to patients using testosterone, anabolic steroids, and other enhancement substances.

Our latest article explores the research, the growing clinical challenges, and why specialized medical education is becoming increasingly important.

📖 READ THE FULL ARTICLE:

https://testosteronologysociety.com/articles

The Testosteronology Society® is dedicated to advancing clinical education through our comprehensive 15-course Professional Education Program, clinical Grand Rounds, research reviews, and professional membership opportunities.

Healthcare professionals are invited to explore how the Society can help expand their knowledge and improve patient care.

🌐 https://testosteronologysociety.com/



Educational purposes only; does not create a doctor-patient relationship.

10/08/2026

Are you equipped to deliver the highest standard of care to patients on testosterone or those facing health risks from years of anabolic steroid and androgen use?

Dr. Thomas O’Connor’s Testosteronology® Professional Education Program gives clinicians the practical knowledge to better evaluate, manage, and protect the long-term health of these patients.

15 Courses | 33+ Hours of Video Training | One Year Society Membership | Just $395

Developed directly by Dr. O’Connor, this comprehensive, evidence-based program goes beyond traditional TRT education to address real-world challenges in testosterone therapy, anabolic-androgenic steroid use, IPEDs, and harm reduction.

What You'll Learn

◉ Apply the ABCDS™ Framework to evaluate critical health markers.
◉ Interpret laboratory results in the context of patient health.
◉ Recognize cardiovascular, kidney, and other androgen-related risks.
◉ Identify complications from long-term testosterone and steroid use.
◉ Apply practical AAS/IPED harm reduction strategies.
◉ Make better-informed, individualized clinical decisions.
◉ Coordinate care with primary care providers and specialists.

Your $395 Enrollment (our lowest price ever!) Includes

◉ All 15 Courses and 33+ Hours of Video Training
◉ One Year Associate Testosteronologist® Membership
◉ Official Society TRT Guidelines
◉ Clinical Topic Presentations Library
◉ Grand Rounds Recording Library
◉ Monthly Live Clinical Q&A Training
◉ Ongoing Clinical Education Updates
◉ Society Insights Newsletter
◉ Associate Testosteronologist® Designation

Physicians, nurse practitioners, physician assistants, and other healthcare professionals can gain the specialized knowledge to recognize risks earlier and deliver more comprehensive care.

https://testosteronologysociety.com/professional-education-program

Address

2151 East Commercial Boulevard Suite 302
Fort Lauderdale, FL
33308

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+18609046779

Website

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