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Dr. Arthur Goldberg Content Administrator Updated on: 08/09/2023 Next review: 08/03/2024
Tamoxifen (slang name: "tamox") is a drug that blocks estrogen receptors in the body, trade name - Nolvadex. Athletes use this drug mainly during post-cycle therapy after using anabolic steroids to restore their own testosterone levels. In medicine, Nolvadex is used to treat breast cancer.
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Benefits of the drug

  1. Almost immediately after use, the drug raises blood cholesterol levels. This significantly reduces the risk of heart disease. After all, as you know, many bodybuilding athletes can suffer from such diseases;
  2. Compared to other drugs, since tamoxifen is a very mild estrogen, it does not harm the internal organs, but, on the contrary, has a positive effect on the human body;
  3. Tamoxifen is much safer than other drugs. Even its long-term use does not cause much harm to the body.

Tamoxifen side effects

Due to the fact that tamoxifen is quite toxic, it has a relatively wide range of side effects. It should be noted that all drugs in this class have similar side effects, the difference lies in the frequency of their manifestation. Nolvadex can cause side effects such as nausea and loss of appetite. With prolonged use, the likelihood of developing heart disease and the growth of cancer cells increases, causing visual impairment.

Disadvantages of the drug

Like any other medicine, tamoxifen has a number of side effects:

  • Due to its structure, the drug inhibits the growth of insulin-like factor in the human body;
  • Tamoxifen acts very slowly. Its action takes many hours. This is especially noticeable at the initial stage of adoption;

The disadvantages include the fact that many bodybuilding doctors advise athletes to take tamoxifen along with other drugs. Very often it is advised to use it with Proviron. After all, this particular drug is capable of burning excess fat in the body. As you can see, another drawback of the drug is clearly indicated here.

How to take tamoxifen in bodybuilding after a course

Let's touch on one popular topic about tamoxifen. Here we will not go into scientific details only in essence. The topic is "How to take tamoxifen in bodybuilding after the course." Indeed, how? To be very precise, this is called post cycle therapy or PCT.

Tamoxifen is an aromatase inhibitor or anti-estrogen. During the course, any anabolic drug leaves its traces, decay products, in the body. These breakdown products begin to increase the level of estradiol in the blood. Estradiol, in turn, causes water retention, high blood pressure, an increase in the mammary glands, and a decrease in the level of its own testosterone.

Tamoxifen action

Before taking tamox, in bodybuilding after a course, let's see what else it can:

  • Antiestrogen;
  • Splitting of adipose tissue;
  • Prevention of cardiovascular diseases;
  • Normalization of the liver;
  • Stimulation of the production of your own testosterone.

How it all works together is not clear at all. For me, it still remains a mystery how it increases the level of its own testosterone, but this is really so, tests were specially taken.

How to take after the course?

Taking tamoxifen is often advised to be combined with anastrozole, but there is no argument for why to combine these two drugs. In our opinion, this should not be done, because anastrozole is the strongest inhibitor and can cope with everything alone, why add a mild antiestrogen.

Taking tamoxifen is popular among budget steroid courses. The cost of one package is about 150 rubles, and it will be enough for months of continuous use.

The scheme of use is every day after a course of 20 mg per day for 2 weeks.

You don't need to do any fractions and divisions, you just throw in a new portion every day and wait for the result.

Operating principle

Tamoxifen is prized for preventing gynecomastia formation. Let's explain now. The mammary gland possesses receptors, these receptors in some people are very sensitive and, when exposed to anabolic steroids, they can swell, and gynecomastia will develop.

Tamox, entering the body, forms a kind of dummy that attaches to the receptor and prevents steroids from acting on it. In order for tamoxifen to be able to save you, you need to start taking it at the beginning of the course, until testosterone has time to take full effect.

Side effects

Side effects can only come out with an individual intolerance to the drug or in case of an overdose.

An overdose is considered to be the use of 80 or more mg at a time.

  • Hair loss;
  • Elevated temperature;
  • Visual impairment;
  • Headache;
  • Nausea;
  • Bone pain;
  • Itching of the perineum.


95% of athletes respond positively to taking tamoxifen. In bodybuilding, taking tamox is common. The drug is time-tested and goes well with anabolic steroids.


Tamoxifen, dosage for gynecomastia:

  1. There is no single treatment regimen for gynecomastia today. Doctors consider each case individually and prescribe treatment based on the history and symptoms. Taking Tamoxifen can be started at any stage of the disease, its effectiveness practically does not change from this. However, you must strictly follow all the recommendations, observe the dosage and regularity of admission.
  2. For the prevention of gynecomastia, Tamoxifen is taken in parallel with the course of steroid hormones. In this case, a daily dosage of 10 mg is sufficient. Tamoxifen should be started 3-4 weeks after starting steroids and continued for some time after the end of anabolic therapy.
  3. In the presence of already formed gynecomastia, the drug can be prescribed at 20-40 mg daily. In the course of various studies, it was found that a daily dose of Tamoxifen, equal to 20 mg, is able to effectively fight gynecomastia and significantly reduce its manifestations, therefore, in most cases, 20 mg of the active substance is sufficient.
  4. However, the doctor selects the required dosage individually. It depends on the degree of manifestation of symptoms and the characteristics of the hormonal background of a particular athlete. In advanced cases, the initial dosage may be 40 mg with a gradual decrease to 20 mg. The tendency to develop gynecomastia and water accumulation in muscles is different and depends only on individual genetics. Higher doses of Tamoxifen are prescribed for athletes who are more susceptible to estrogen exposure.

Recommendations for taking tablets: drink plenty of liquid, do not chew, can be taken with food. To maintain a stable concentration of Tamoxifen in the blood, it is better to divide the daily dose into two doses, if possible.

Do not make the dosage decision yourself. Only a doctor can correctly assess the severity of symptoms and the need for treatment.

Find out more about gynecomastia on our website:

  • How to get rid of the disease at home?
  • Surgical removal.
  • Features of false and true gynecomastia.


The drug "Tamoxifen" ("Vero-Tamoxifen") should not be prescribed in case of hypersensitivity to this drug, in case of pregnancy and during the entire period of breastfeeding. Use with caution in eye diseases (cataracts), hyperlipidemia and leukopenia. This medication is undesirable for hypercalcemia and thrombocytopenia, severe thrombophlebitis and thromboembolic disease.

Tamoxifen characteristics

Taking tamoxifen together with anabolic steroids can significantly reduce the risk of female hormones in the blood of athletes.

Tamoxifen is a drug that is significantly different from drugs that have the same effect. The main distinguishing feature of tamoxifen is that this medication is neither anabiotic nor androgenic.

For bodybuilders and bodybuilders, tamoxifen is recommended as an effective means of losing weight, increasing muscle mass, and increasing strength.

It is quite logical that, according to bodybuilders, without tamoxifen, it is impossible to win the competition, unless, of course, doping is used. Tamoxifen is also considered useful among bodybuilders because it has a pronounced anti-estrogenic effect - it is a sex hormone.

Hormones, hormones, hormones ...

Damn, how many have rummaged through the sources explaining the effect of Tamoxifen, everywhere (literally - everywhere) the information begins with what this drug was originally developed and intended for. And this section has a lot of space.

The question is: why? After all, I (or any other interested bodybuilder) is interested in obtaining and information on how to use this drug correctly, and not for what it was created. So let's skip this topic, and I'd rather move on to describing the action of the drug you are interested in, dear friends.

This section, as you understand, is reserved for hormones. The fact is that both female and male hormones are present in any organism. In women, the overwhelming majority of women are estrogens, in men - men, that is, testosterone.

With the active (correct and incorrect) "use" of anabolic steroids in the body, an imbalance of these hormones occurs: in men, estrogen becomes more, in women, the level of testosterone rises. Again, let's skip the details of how this happens. I’ll just say this is happening. This is why athletes of any gender use Tamoxifen as a therapy.

A similar picture of a violation at the hormonal level is dangerous with many unpleasant and even fatal consequences. These include feminization in men, decreased functioning of the genitals, increased hair growth in women, coarsening of the voice - and much more!

Therefore, any athlete needs therapy, which is drugs like Tamoxifen.
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Instructions for use in bodybuilding

It is often used by athletes to lower estrogen levels in the body. When using steroids, testosterone levels increase, and with it estrogen also rises, and the agent prevents the second from increasing. As a result, the level of the male hormone will be at a high level, in contrast to the female.

Dosing, course duration

After the complete completion of the course of anabolic steroids, the drug in question should be used in combination with aromatase inhibitors. The drug is used in amounts of 10 to 20 milligrams daily, starting from the last 7 days of the steroid cycle and ending with the second week after its completion.

If the medicine is not used in combination with aromatase inhibitors, then Tamoxifen should be started a little later, namely for 14 days, and finished 2-3 weeks after its cancellation.

Before using Tamoxifen on PCT, the following rules should be followed:

  • start using the product 7 days after starting the use of steroids;
  • one tablet will be enough once a day;
  • after a course of steroids, the use of the drug should continue for another 14 days.

Drug interactions


  • Tamoxifen and cytostatics - increases the risk of blood clots;
  • Tamoxifen and thiazide diuretics - increases the likelihood of developing hypercalcemia;
  • Tamoxifen and tegafur - a possible beginning of the development of liver cirrhosis and hepatitis in the chronic stage;
  • With other hormonal agents - the specific effect of both drugs weakens.
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