Tamoxifen – Nolvadex 20mg (Tamoxifen Citrate) is one of the most widely used SERMs in bodybuilding and hormone therapy. It works by selectively binding to estrogen receptors in breast tissue and the hypothalamus, blocking estrogen’s effects and reducing negative symptoms such as gynecomastia (male breast tissue growth) and water retention.
During post-cycle therapy, Nolvadex helps reactivate the hypothalamic-pituitary-gonadal axis by inhibiting estrogen feedback, which increases luteinizing hormone (LH) and follicle-stimulating hormone (FSH) release, stimulating natural testosterone production. This assists in maintaining muscle mass gained during steroid cycles and reduces estrogen-related side effects.
Nolvadex is favored due to its effectiveness, relatively mild side effects, and oral administration. It does not suppress natural testosterone production, making it ideal for recovery protocols.
Benefits
Prevents and treats gynecomastia
Stimulates natural testosterone production during PCT
Blocks estrogen receptors selectively
Helps maintain muscle gains and libido post-cycle
Oral administration with well-established efficacy
Side effects
Hot flashes and mild menopausal-like symptoms
Nausea or gastrointestinal discomfort
Fatigue or mood swings in some users
Possible headache or dizziness
Rare allergic reactions
Dosages & ProtocolFor MenTypical PCT dosing schedule with Tamoxifen – Nolvadex 20mg:Week 1: 40mg/day = 2 tablets dailyWeeks 2–4: 20mg/day = 1 tablet daily
Cycle Length: 3–4 weeks
Start Nolvadex 3–7 days after the last injection of fast-acting steroids or 14–21 days after long-acting esters.
Not recommended for women due to hormonal effects and intended use in male recovery protocols.
How to administerTamoxifen – Nolvadex 20mg is taken orally, preferably at the same time each day, with or without food.
Instructions:
Take tablets with water
Consistency is important for effective hormone modulation
Do not exceed recommended dose or cycle length without medical supervision
Monitor for side effects and report any severe reactions
Storage
Store in a cool, dry place below 25°C
Protect from light and moisture
Keep out of reach of children
Half-life & detectability
Half-life: Approximately 5–7 days
Detection time: Up to 6 weeks
For athletes subject to drug testing, it is important to consider these detection times and plan accordingly to avoid positive tests for banned substances.
Dosage Instructions
10 – 20mg / Day
Nolvadex Dosage During Anabolic Steroid Use
The primary, and for most of us the only reason to use Nolvadex during a steroid cycle is to protect against male breast tissue enlargement – a.k.a gynecomastia. Any anabolic-androgenic steroids you are taking which have aromatizing properties will need gyno to be addressed and Nolvadex provides a cheap, simple and safe way to do that.
It only takes a low dosage of 10mg to 20mg per day of Nolvadex to protect against gyno as it works to bind to receptors in the breast tissue so that estrogen can’t exert its effects here. If you find that the aromatizing effect of the steroids, you’re taking are too powerful for Nolvadex to be effective at this dosage then aromatase inhibitor drugs will likely be required instead.
Female Nolvadex Dosage
When females use Nolvadex for performance enhancement it is often used for just that: to enhance performance as a result of increased testosterone levels. This can make Nolvadex a viable alternative for women not wanting the more powerful effects of steroids that bring high risk of masculinization side effects.
Aside from performance enhancement, women can make use of Nolvadex to improve the physique with this drug bringing about a leaner and tighter physique without the associated risks of steroids. For all these effects, females require a very low dosage of Nolvadex with just 10mg per day being sufficient.
Nolvadex Dosage for PCT and Increased Endogenous Testosterone Secretion
During PCT we use Nolvadex at higher dosages to stimulate the release of natural testosterone following severe suppression of normal function after during and after steroid use.
A cycle of 4 to 8 weeks is always advised for post cycle therapy, and often other compounds will be utilized alongside Nolvadex including an aromatase inhibitor and often Human Chorionic Gonadotropin (hCG).
When it comes to Nolvadex dosage for post cycle therapy, whether you are undertaking either a 4- or 8-week cycle or something in between, the recommended dose for most men is 40mg per day for the first half of your PCT cycle, dropping this down to 20mg per day for the second half of PCT.
The timing of your post cycle therapy starting depends on the active life of your steroids: short ester steroids will need you to start PCT within just days of ending your steroid cycle, while long-acting steroids require you to wait up to two or three weeks before starting post cycle therapy with Nolvadex and other compounds.
Effect on Cycle
Nolvadex for Gynecomastia
In its function as an anti-estrogen breast cancer treatment drug, Nolvadex targets the breast tissue, and this means it’s highly useful for the prevention of dreaded gynecomastia in male anabolic steroid users. Because estrogen can cause cancer to progress in the breast area, when Nolvadex binds to estrogen receptors in this part of the body, it effectively halts the action of estrogen there.
This is exactly what we need to be also happening to stop gynecomastia occurring as an estrogen related negative effects of many AAS. Nolvadex has proven effective at this task which is why it is so popularly used alongside steroids and after a steroid cycle.
On cycle use of Nolvadex to protect against male breast enlargement is an established anabolic steroid user protocol. This drug works well for many people using it for this purpose, but not everyone will have the same positive results.
Using steroids which are powerfully aromatizing or being particularly sensitive to gyno can mean that Nolvadex won’t be enough to stop you experiencing gyno as a steroid side effect; in these cases, you might need to turn to aromatase inhibitor drugs instead.
Nolvadex for Post Cycle Therapy (PCT)
Nolvadex is very commonly used in post cycle therapy so that natural testosterone can be stimulated again after being suppressed by anabolic steroid use.
Nolvadex is known for its excellent ability to stimulate testosterone levels while blocking the effect of estrogen, enabling greater amounts of luteinizing hormone (LH) to be released by the pituitary gland.
As a breast cancer treating SERM for women, most of the side effects recorded for Nolvadex apply to its use in this area and in females. But, as it’s a long-standing drug used by male anabolic steroid users, enough anecdotal evidence and personal experience exists to pinpoint some of the side effects that tend to be more common amongst males when the drug is used for this purpose, while in other cases we can eliminate many of the side effects that are listed for Nolvadex for women using it to treat breast cancer.
Not only is the female body reacting different to the drug, but when it’s used as cancer medication it is a much longer-term use compared with guys using it to reduce estrogen side effects while on steroids or during post cycle therapy to restore testosterone function. Therefore, these long-term side effects can also be virtually eliminated as it relates to your use of Nolvadex.
So, what are some of the main possible long-term side-effects you should be on the lookout for when using Nolvadex either on-cycle or during post cycle therapy?
Acne
Nausea or Cramping of the Abdomen
