Written by & Featuring Dr. Thomas O'Connor


Generation Iron: Natty 4 Life

Expert Medical Opinion

Dr O’Connor was interviewed for the film.

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Muscle & Fitness:

The Future of Steroids and Performance Enhancers

Expert Medical Opinion

Dr. O'Connor was interviewed in the film.

As Ben Pakulski contemplates the future of steroids in bodybuilding and powerlifting, he evokes the 2011 Bradley Cooper movie Limitless. In the film, Cooper’s character, a struggling writer, takes a pill that...

Enhanced 2 The Max

Expert Medical Opinion

Dr O’Connor was interviewed for the film.

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Muscle & Fitness:

5 Experts Talk Steroids and Bodybuilding

Expert Medical Opinion

To clear up the confusion, we set out to have honest conversations with experts in the field to give you a sense of what you should know. Check out five experts' takes on the use of steroids in bodybuilding...

Generation Iron 3

Expert Medical Opinion

Dr O’Connor was interviewed for the film.

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Muscle & Fitness:

How Steroid Abuse Leads to Infertility in the Pursuit of Male Perfection

Expert Medical Opinion

What would possess men to (rather ironically) carve themselves into these “pinnacles of evolution” knowing that they’re severely damaging their fertility? Eager to get more context about men who fall into this paradox, we spoke with Dr. Thomas O’Connor, MD...


Article in Muscular Development Magazine


Muscle & Fitness:

How Much of a Pro Bodybuilder's Success Is Dependent on Steroids?

Expert Medical Opinion

Ever take a look at a professional bodybuilding competition and wonder how many of the participants are using steroids? Curious to get some answers? We posed the question to Dr. Thomas O’Connor, MD...

New York Times:

A Better Body in a Pill? Experts Urge Caution on SARMs

Expert Medical Opinion

Dr O’Connor featured in The New York Times discussing SARMs.

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Muscle & Fitness:

What are SARMs and Are They Safe?

Expert Medical Opinion

But what exactly are the bodybuilding pills? Well, for starters, SARMs stand for “selective androgen receptive modulators” and they’re widely being sold on the Internet as an alternative to steroids, as Dr. Thomas O’Connor explains...

Muscle & Fitness:

What is Bubble Gut & Why do Bodybuilders get it?

Expert Medical Opinion

“There’s no data; it’s all anecdotal,” says Dr. Thomas O’Connor, aka the “Anabolic Doc,” who specializes in patients seeking recovery from anabolic-steroid use Opens a New Window. . However, O’Connor goes on to say that the bubble gut is a result of drug use...

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Muscle & Fitness Magazine's Steroid Encyclopedia

Expert Medical Opinion

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PCT: Does it Work?

Article in Muscle Sport Magazine

Steroids on Politics

If you want to hear another story about the negative balance of trade with China, consider this: The US is now the largest outlet for anabolic steroids made in China. Import duties? These drugs can arrive hidden in duty free products, gratis US customs regulations. So, every day we are importing–inviting– the seeds of our own destruction, without a whisper from Homeland Security. And the worst part? It’s not a secret....

What it Takes to Bench 500 lbs. RAW

This is not going to be a “how to” cook book on bench pressing 500 lbs. Indeed, it takes great genes, insane training, extreme desire and yes, anabolic steroids. Now, I’m not saying that every guy who benches 500 lbs. raw is on the sauce, but the truth is that most, by far are. I have been caring for men...

I’ve stayed away from writing about Human Growth Hormone- HGH and  any of the related agents such as IGF-1, IGF-1 Lr3 and IGF-1 DES simply because these agents have not been used or discussed in the main-stream medical community. Anabolic Androgenic Steroids- AAS have, in more recent years been getting a lot of attention and this is where I have been focusing my clinical attention...

Steroid Addiction 

As a physician who has been treating men who have used or are using AAS since 2005, I am all too familiar with the psycho-endocrinal side effects of these drugs, notably anabolic steroid induced hypogonadism (ASIH), a form of hypogonadism which, although recognized by experts as unique to AAS users, (Rhanema et al, 2014) is not discussed in the FDA warning content. This is a serious omission​...

There are some welcome changes taking place in the medical community which indicate that the number of  physicians knowledgeable enough, and interested in caring for Anabolic/Androgenic Steroid AAS users is likely to increase. A number of experts...

We have all heard it before, “Roid Rage” is BS. It’s not true! People say- there is no evidence that Roid Rage exists and that guy who is acting like a crazy jerk, known to be on steroids is just “an ASS-HOLE on steroids!” Ok, I get it, but being the Doc, I feel obligated to do my research on what is really going on here. Everyone knows...

EPIDEMIC: Of Low Testosterone In American Men

Is it true? With all this hype on men turning into women, I decided to take some time and do some of my own research on this topic for myself- here is what I found.

A recent, well done study peers into what is going on with men and low testosterone...

Anabolic Steroids and Sex: The Good, the Bad, and the Ugly

Article in Muscle Sport Magazine

Trenbolone (Tren) AKA Fina 2 Medical Mysteries

Trenbalone is without a doubt the most powerful anabolic/androgenic steroid (AAS) known. Bro-Science vernacular tells us that injecting Tren can lead to “Tren-Cough”- a variant cough reaction immediately following an intramuscular injection that can range from a simply irritating tickle in the throat to a violet cough spasm leading to the sensation of asphyxiation. I have had patients tell me...

A Letter to Senator Christopher Murphy​

Earlier this month, I sent a letter to my congressional representative, Senator, Chris Murphy, asking for his help with what I believe is a medical crisis, the under treatment of former and current anabolic steroid users. I am not the first to identify this crisis; almost a decade ago, researchers at Harvard University published their warning about this “emerging” healthcare crisis. (Kanayama, G et al, 2009) I am fully aware of the fact that AAS are illegal. However, as a physician...

Anabolic Steroids and Sex: The Good, The Bad and the Libido

Ok, this is going to be a good one! My articles are never boring, as I discuss how anabolic/androgenic steroids-AAS cause medical issues like early cardiovascular disease, low testosterone, gynecomastia and sundry organ disease, but this article will BLOW UP for one reason only- SEX!!!!!

It is true; most men who seek-out my unique medical services...

Our Youth Steroids Problem more Pressing

I cannot imagine what possible justification the U.S. Department of Justice has for spending time and money on investigating the Russian Olympics cheating scandal. The motivation can only be political -- pressure on Russia -- since there is no other advantage for us. It certainly does nothing to...

Anabolic Steroid Induced Gynecomastia

Anabolic/Androgenic steroid (AAS) use is associated with a host of side effects- some can be serious and cause medical disease, others are more of a nuisance and can lead to a poor quality-of-life and cosmetic issues like gynecomastia. Of all the known side-effects of AAS, gynecomastia has to be one of the most infamous...

Medical Issues To Be Aware of Associated With Anabolic Steroids part 2

March 2015, The FDA mandated that all manufacturers of testosterone place a WARNING on all approved prescription testosterone products notifying patients of the possibility of increased risk of heart attacks, strokes and death in patients taking testosterone...

The Return of the Anabolic Doc

Cover story in Muscle Sport Magazine

Medical Issues to be Aware of Associated with Anabolic Steroids

Anabolic steroids were initially created/discovered in the 1930’s. Since this time, millions of people have used these medical agents for both personal and professional reasons. The fascination...

Anabolic Steroid Induced Hypogonadism (ASIH) AKA Acquired Shutdown of the Hypothalamic Pituitary/Testicular System

ASIH androgen deficiency has long been discussed in professional literature. It denotes the shutting down of the hypothalamic pituitary/testicular system (HPT) as a result of long term anabolic/androgenic steroid (AAS) use. The condition is...


Connecticut doctor Thomas O'Connor recalls patients of Dr. Tony Galea coming to him to kick steroids

O'Connor, on staff at three Connecticut hospitals (including Hartford and St. Francis) and who says steroid abusers come to him to kick performance-enhancing drug use, told the Daily News...


Relevant News

Highlighted medical articles

THIS IS HUGE NEWS!! I am one of the few American Physicians experienced in Anabolic Steroid Induced Hypogonadism- ASIH and I have been carefully evaluating men for this condition since 2005. The FDA is making the right move with this warning, although my fear is that there are not enough trained and experienced physicians in America to deal with this. Physicians are already overloaded with patient demands, now men with Low-testosterone, not to mention men potentially abusing anabolic/androgenic steroids AAS may suffer further as this new ruling may separate more men in need from expert medical care.


Dr O


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I am the first American physician in 2005 to deal with anabolic steroids in a professional/ non judgmental manner. I'm very happy to see that the medical community is finally doing something about it!

Dr O


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I'm very happy to see that my colleagues are speaking up and talking openly and in a non-judgmental manner about anabolic steroid use.
We are making great strides in helping educate the world about anabolic steroids! It's about time!

Dr. O

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I've reviewed the recent NCAA task force's guidelines on how to screen college athletes prior to participating in sports. They are not recommending universal ECG's. Like many other expert physicians caring for young athletes, I adamantly disagree with this decision, although I understand why they are doing so. Here is why- Universal screening all NCAA athletes with ECG's would be too expensive and the accurate interpretation of such ECG's would be difficult and may not lead to saved lives.


What to do? If you or someone you love is either participating in college sports or planning on doing so, make sure that person sees a Board Certified Internist, Family Medicine Physician or best, a Board Certified Cardiologist.


Dr. O

Huge great news for men living on testosterone! This large, well done study shows testosterone for chronic use appears safe for the heart and prostate! This is more great news, but men at risk for heart disease and prostate cancer will always need to be closely monitored by an expert physician. 


Dr. O




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