Tamoxifen

Tamoxifen blocks estrogen's effect on breast tissue, relieving breast pain and reducing the enlarged tissue some men develop, including on hormone therapy. IAM dispenses the manufactured 20mg tablet. A licensed provider reviews your symptoms, what may be causing them and your history before prescribing.
Pharmacy shipping: $20 added once per medication order.
Availability and pricing are confirmed after provider review.
What tamoxifen can help with
Relief from breast tenderness and swelling.
Tamoxifen blocks estrogen's effect on breast tissue, which is why it is used for gynecomastia, the tender or enlarged breast tissue some men develop, including on hormone therapy. IAM's provider prescribes the 20mg tablet after reviewing the cause and your options.
Ease breast pain
In a double-blind crossover trial of men with gynecomastia, tamoxifen relieved breast pain compared with placebo.
Reduce enlarged breast tissue
The same trial found a partial reduction in breast size in some of the men. Your provider assesses how long the tissue has been present and what is driving it, since medicines and hormone changes are common causes.
A tablet with a clear plan
Tamoxifen is a manufactured 20mg tablet, prescribed from your symptoms and the medicines or hormone changes that may be contributing, with follow-up set by your provider.
How it works
Tamoxifen is a selective estrogen receptor modulator. In breast tissue it occupies the estrogen receptor without switching it on, so estrogen cannot drive the growth and tenderness of that tissue.
Research and product information
Tamoxifen's approved uses are breast-cancer treatment and specified risk-reduction settings; gynecomastia is off-label, and the cited evidence is a small crossover trial, so not every man responds.
- Tamoxifen: current prescribing information and important risks
- Tamoxifen for gynecomastia: double-blind crossover trial
Sources checked .
Patient reviews
What patients say about IAM.
Completely satisfied.
I went to my general doctor, got bloodwork done, results came back low, and they didn't want to do anything about. Got ahold of Emil at IAMHRT and he was nothing but helpful. He hooked me up with the office. They were attentive, helpful, answered all my questions and prompt. I've been on treatment now for about 5 months. They call me when it is time for a refill to remind me. They were upfront about the process and the pricing. It has been a great experience.
Great experience and service
I've been a patient of IAM for about nine months. The initial intake process was simple and straightforward, and we were able to set up an initial consultation just a few days after I had my lab work done. Andrew at IAM has been great to work with. Good insights and advice into all of my results, not just T. Advised on my HDL, LDL, and pretty much everything else in a full blood panel. Within a couple of doses, I was feeling much better. Sleeping better, better mental clarity, and more energy. Highly recommend Emil, Andrew and the rest of the IAM team.
The best HRT group of folks I've ever experienced.
Written by IAM patients in their own words, with only spelling corrected. Individual results vary.
Your path to Tamoxifen
Complete the assessment
Share your symptoms, medications, health history, and recent labs in the patient portal.
Provider review
A licensed provider decides whether tamoxifen is appropriate and sets the prescription.
Ongoing follow-up
Your provider reviews your response and any clinically indicated follow-up.
About this treatment
What it is
Tamoxifen is a prescription selective estrogen receptor modulator that blocks estrogen in breast tissue. IAM dispenses the 20mg tablet when a licensed provider determines it is clinically appropriate.
Who it's for
Patients whose provider decides a selective estrogen receptor modulator belongs in their care after reviewing symptoms, medications, health history, and relevant lab results.
Forms we dispense
Tablet 20mg
A licensed provider reviews your history and requests labs when clinically appropriate before prescribing.
Prescriptions are coordinated with our licensed US pharmacy partner, with dosing supplies included when needed.
We do not sell pharmaceuticals online. Every prescription comes after a full provider review.
