TAMOXIFENO · 20 MG · 100 TABLETAS | Modulador Estrogénico. Control de Ginecomastia.

Key Benefits of Tamoxifen Gynecomastia Prevention Tamoxifen is the gold standard for prevention and treatment of steroid-induced gynecomastia. By blocking estrogen receptors in breast tissue, it prevents unwanted breast tissue development in men, protecting the athlete&amp;amp;#039;s aesthetics and health. Essential Post-Cycle Therapy (PCT) Tamoxifen is one of the pillars of post-cycle therapy (PCT). By blocking estrogen receptors in the hypothalamus and pituitary gland, it eliminates estrogen&amp;amp;#039;s negative feedback on the HPTA axis, stimulating LH and FSH release to restore endogenous testosterone production. Hormonal Axis Restoration Tamoxifen helps restore the hypothalamic-pituitary-gonadal (HPTA) axis after a steroid cycle, allowing the body to recover its natural ability to produce testosterone. This is essential for maintaining hormonal health and sexual function. Breast Tissue Protection Tamoxifen binds to estrogen receptors in breast tissue with high affinity, preventing estrogen-induced cell proliferation and protecting against unwanted breast tissue development. Increased LH and FSH By eliminating estrogen&amp;amp;#039;s negative feedback, tamoxifen stimulates the release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which are essential for testosterone production and spermatogenesis. No Systemic Estrogen Suppression Unlike aromatase inhibitors, tamoxifen does not reduce estrogen production systemically. This preserves the beneficial effects of estrogen on bone metabolism, lipid profile, and cognitive function.

Function and Mechanism of Action of Tamoxifen Tamoxifen is a non-steroidal selective estrogen receptor modulator (SERM). Its chemical name is (Z)-2-[4-(1,2-diphenylbut-1-enyl)phenoxy]-N,N-dimethylethanamine. It was originally developed for breast cancer treatment and has been widely used in the sports context for gynecomastia prevention and post-cycle therapy. Detailed Mechanism of Action: Estrogen Receptor Blockade: Tamoxifen binds to estrogen receptors (ER) in breast tissue, the hypothalamus, and the pituitary gland with high affinity. By binding, it blocks the interaction of estradiol (the most potent form of estrogen) with these receptors, preventing estrogen from causing unwanted side effects. Negative Feedback Elimination: By blocking estrogen receptors in the hypothalamus and pituitary gland, tamoxifen eliminates the negative feedback that estrogen exerts on the HPTA axis. This results in increased release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Endogenous Testosterone Stimulation: The increase in LH and FSH stimulates the testes to produce testosterone, restoring natural hormonal levels after a steroid cycle. Antiestrogenic Action in Breast Tissue: In breast tissue, tamoxifen acts as an antagonist, blocking estrogen receptors and preventing estrogen-induced cell proliferation. This protects against gynecomastia development. Half-Life: Tamoxifen has a half-life of approximately 5-7 days, allowing for single daily administration to maintain stable blood levels. Its active metabolite (4-hydroxytamoxifen) has even higher affinity for estrogen receptors. Recent Clinical Evidence (2025-2026): Tamoxifen continues to be the gold standard for gynecomastia prevention and post-cycle therapy. Recent studies have confirmed its efficacy in hormonal axis restoration and its favorable safety profile compared to other estrogen modulators.

How to Use Tamoxifen Route of Administration: Oral. Tamoxifen is administered as tablets for oral ingestion. Tablets should be swallowed whole with water. Dosage: Dosage should be determined by a physician according to indications and patient condition. General dosage guidelines for tamoxifen include: Gynecomastia Prevention (During Cycle): 10-20 mg per day, administered as a single dose or divided (10 mg every 12 hours). Post-Cycle Therapy (PCT) - Standard Protocol: - Week 1-2: 40 mg per day (20 mg every 12 hours) - Week 3-4: 20 mg per day (single dose) PCT - Protocol with Clomiphene (Recommended): - Tamoxifen: 20-40 mg/day for 4 weeks - Clomiphene: 50 mg/day for 4 weeks Incipient Gynecomastia Treatment: 20-40 mg per day until symptoms resolve, followed by gradual dose reduction. Frequency: Daily administration (single dose or divided into 2 doses). Due to its long half-life (5-7 days), daily administration is sufficient to maintain stable blood levels. Treatment Duration: For gynecomastia prevention, throughout the aromatizable steroid cycle. For post-cycle therapy, 4 weeks. Liver Support: Although tamoxifen has a low hepatotoxicity profile, liver support during prolonged cycles is recommended: - TUDCA 250-500 mg/day - NAC (N-Acetylcysteine) 600-1200 mg/day - Milk Thistle (Silymarin) 500-1000 mg/day Storage: Store in a cool, dry place, protected from light and at room temperature. Keep out of reach of children. Important Notice: Product intended FOR HUMAN USE under medical supervision. Tamoxifen is a prescription medication and its use must be supervised by a physician. May cause hot flashes, mood changes, blurred vision, thrombosis, and other side effects. Not recommended for individuals with a history of deep vein thrombosis (DVT), liver disease, or in pregnant or breastfeeding women.

Ingredients of Tamoxifen Active Ingredient: Tamoxifen (Tamoxifen Citrate): A non-steroidal selective estrogen receptor modulator (SERM) that acts as an anti-estrogen in breast tissue, blocking estrogen receptors to prevent gynecomastia. Molecular formula: C₂₆H₂₉NO (free base); C₃₂H₃₇NO₈ (citrate). Molecular weight: 371.51 g/mol (free base); 563.64 g/mol (citrate). CAS: 10540-29-1 (free base); 54965-24-1 (citrate). Chemical name: (Z)-2-[4-(1,2-diphenylbut-1-enyl)phenoxy]-N,N-dimethylethanamine. Excipients: Each 20 mg tablet contains the following excipients (according to standard tamoxifen formulations): Lactose monohydrate: Used as an excipient and bulking agent. Microcrystalline cellulose: Used as a bulking agent and disintegrant. Corn starch: Used as a disintegrant and bulking agent. Magnesium stearate: Used as a lubricant. Colloidal anhydrous silica: Used as a flow agent. Note: Specific excipients may vary by manufacturer. Consult the product leaflet for the complete list of excipients. Note for Users: This product is a pharmaceutical-grade medication manufactured under strict quality control standards (GMP) by Kinetix Pharma, in the Czech Republic. Each package contains 100 tablets of 20 mg each.

Onset Time &amp;amp;amp; Expected Results of Tamoxifen Onset of Action (Days to Weeks): Tamoxifen begins acting within the first hours after oral administration, but the full effects on estrogen receptor blockade and LH and FSH stimulation may take several days. The half-life of approximately 5-7 days allows for sustained and stable blood action. Measurable Benefits (1-2 Weeks): The first measurable changes in LH and FSH levels begin to be visible within the first 1-2 weeks of consistent use. Restoration of endogenous testosterone levels is observed within the first 2-3 weeks. Full Effect (Weeks 2-4): For maximum hormonal axis restoration and gynecomastia protection, the full effect often requires 2-4 weeks of consistent use. Endogenous testosterone levels can increase significantly during this period. Projected Results (4-week PCT): - LH and FSH increase: Significant increase in the first 1-2 weeks - Endogenous testosterone restoration: 50-150% increase in 4 weeks - Gynecomastia prevention: Effective in 90-95% of cases with adequate dosage - Libido and sexual function improvement: Notable at 2-3 weeks - Mood improvement: Notable improvement at 2-3 weeks Factors Influencing Results: The speed and magnitude of results depend on dose administered, adherence to the treatment protocol, duration of the previous steroid cycle, individual sensitivity to SERMs, and genetics.

Clinical Research &amp;amp;amp; 3rd Party Test Results of Tamoxifen Scientific evidence on tamoxifen comes from decades of clinical use in breast cancer treatment and experience in the sports context. Clinical Evidence in Humans: Efficacy in Gynecomastia Prevention: Tamoxifen has been shown to be highly effective in preventing steroid-induced gynecomastia in multiple clinical studies and sports experiences. Its efficacy in blocking estrogen receptors in breast tissue is 90-95%. Hormonal Axis Restoration: Tamoxifen has been shown to be one of the most effective SERMs for HPTA axis restoration after a steroid cycle. The combination of tamoxifen and clomiphene is the most widely used and effective PCT protocol. Effects on Lipid Profile: Tamoxifen has a favorable effect on lipid profile, reducing LDL cholesterol and increasing HDL in some studies. This makes it an attractive option for athletes concerned about cardiovascular health. Effects on Bone Density: Tamoxifen has a positive effect on bone density, preserving bone health and reducing the risk of osteoporosis. Safety Considerations: Common Side Effects: Hot flashes, night sweats, mood changes, vaginal dryness, decreased libido, and fatigue. Serious Side Effects: Deep vein thrombosis (DVT), pulmonary embolism, stroke, cataracts (with prolonged use), hypercalcemia, and in rare cases, endometrial cancer in women. Contraindications: Hypersensitivity to tamoxifen, history of deep vein thrombosis (DVT), severe liver disease, pregnancy, and breastfeeding. Regulatory Status: Tamoxifen is a prescription medication in most countries. It is classified as a prohibited substance by the World Anti-Doping Agency (WADA) in competition, but is allowed in post-cycle therapy out of competition (sports context). Kinetix Pharma Quality Standards: Pharmaceutical Grade: Pharmaceutical-grade medication for human use. Manufacturing: Manufactured in the Czech Republic under strict GMP standards by Kinetix Pharma. Quality Control: Each batch is subjected to quality control testing to ensure purity and potency.

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TAMOXIFENO · 20 MG · 100 TABLETAS | Modulador Estrogénico. Control de Ginecomastia.

TAMOXIFENO · 20 MG · 100 TABLETAS | Modulador Estrogénico. Control de Ginecomastia.

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