

CLASSIFICATION: SELECTIVE ESTROGEN RECEPTOR MODULATOR (SERM)
ACTIVE SUBSTANCE: TAMOXIFEN CITRATE
FORM: 30 TABLETS x 10 MG
ACTIVE HALF-LIFE: ~5–7 DAYS
DOSAGE: MEN 20-120 MG/DAY
ACNE: POSSIBLE
WATER RETENTION: LOW TO MODERATE
HIGH BLOOD PRESSURE (HBP): NOT TYPICAL
HEPATOTOXICITY: RARE
AROMATIZATION: NONE
MANUFACTURER: ACTAVIS
Tamoxifen is a selective estrogen receptor modulator (SERM) supplied here in a flexible 10 mg tablet strength to support clinician-directed dosing plans. Unlike aromatase inhibitors (AIs) that reduce estrogen production, a SERM modulates the estrogen receptor (ER) response in a tissue-selective way—acting as an antagonist in some tissues (e.g., breast) while functioning as a partial agonist in others (e.g., bone). This distinction matters for athletes and fitness enthusiasts who are working with a healthcare professional on defined clinical goals, because the choice between a SERM and an AI depends on the desired physiological endpoint, laboratory values, and risk profile.
Endogenous estrogens bind ERα and ERβ, recruiting co-activators/co-repressors to regulate gene transcription. Tamoxifen and its active metabolites (notably endoxifen and 4-hydroxytamoxifen) bind these receptors and alter downstream signaling. In breast tissue, this typically results in functional antagonism, which is central to tamoxifen's approved oncologic indications. In bone, partial agonism can help preserve mineral density—one key reason SERMs are not interchangeable with AIs. Because tamoxifen does not inhibit aromatase, circulating estradiol (E2) may remain measurable; therapeutic effects arise primarily from receptor-level modulation.
Serious trainees often run into scenarios where estrogen signaling balance matters—whether related to a clinician-managed recovery phase, a medical condition, or the need to protect specific tissues while avoiding unnecessary suppression of systemic hormones. In such cases, clinicians may select a SERM when the aim is to block estrogen's action in target tissues without broadly lowering circulating estrogen. Tamoxifen is a prescription medication, not a general wellness supplement, and should never be self-directed. A proper plan includes history, physical exam, labs, and follow-up.
The 10 mg tablet offers fine-tuned control. Clinicians sometimes employ lower daily doses or stepwise titration to reach the minimal effective dose while monitoring side effects, interactions, and lab parameters. In long courses, the ability to individualize dose by small increments helps balance efficacy and tolerability—especially relevant when a patient's body mass, hepatic metabolism, or concomitant medications change over time.
Switching between classes without medical supervision can yield unintended consequences. Your prescriber will choose based on labs (e.g., E2, LH/FSH when appropriate), personal history, and the overall plan.
Common side effects may include hot flashes, transient GI discomfort, leg cramps, or mood changes. Rare but serious risks include thromboembolic events (DVT/PE), endometrial changes, and ocular symptoms. Seek urgent evaluation for leg swelling/pain, chest pain, sudden shortness of breath, or vision changes. Because tamoxifen is metabolized hepatically, clinicians may order periodic liver function tests (LFTs) in longer courses or in the presence of comorbidities. Tell your prescriber about all medications and supplements—particularly those that affect CYP2D6 (certain SSRIs) and CYP3A4 (select antifungals, macrolides, anticonvulsants), as these may influence endoxifen exposure and clinical effect.
For bodybuilders, athletes, and fitness enthusiasts, medicines like tamoxifen—when clinically indicated—are adjuncts to fundamentals. Prioritize periodized programming, protein intake in the ballpark of 1.6–2.2 g/kg/day, sufficient total calories for your phase (deficit vs surplus), sleep (7–9 hours), and stress control. If your plan involves other prescription therapies, coordinate scheduling and monitoring so that lab work, vitals, and symptom tracking remain consistent. Do not "stack" or substitute SERMs and AIs without explicit medical instruction.
For FDA-vetted details on indications, contraindications, interactions, and boxed warnings, consult an authoritative source such as MedlinePlus: Tamoxifen. Your clinician will tailor these principles to your case.
These Dragon Pharma items are frequently discussed in clinician-directed plans for tissue-selective estrogen management, recovery phases, or fertility support. They are not substitutes for medical care. Use only as legally prescribed and monitored:
This listing is for genuine Actavis Tamoxifen 10 mg tablets (30 count). Store at room temperature, away from moisture, heat, and light. Keep out of reach of children. Use only if prescribed and sourced legally in your jurisdiction. We provide discreet USA shipping and secure checkout.
Medical & legal disclaimer: Educational content only; not medical advice. Use prescription medicines solely under a licensed clinician's supervision and according to local laws.
No. Tamoxifen modulates estrogen receptors (SERM). Circulating estradiol can remain measurable; effects are tissue-specific. To lower estrogen production, clinicians may choose an aromatase inhibitor instead.
The 10 mg tablet allows precise dose-finding and stepwise titration to the lowest effective daily amount, improving tolerability and matching individual response under medical supervision.
The parent half-life is about 5–7 days, with active metabolites persisting longer. Benefits depend on consistent daily use and may take time to become evident.
No. Tamoxifen is prescription-only and carries risks (e.g., blood clots, ocular changes). Proper evaluation, dosing, and monitoring by a licensed clinician are essential.
Provide a complete list, especially drugs affecting CYP2D6/CYP3A4 (some SSRIs, antifungals, macrolide antibiotics, anticonvulsants) and any performance supplements. Your regimen may require adjustments.
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SELECTIVE ESTROGEN RECEPTOR MODULATOR
ACTIVE SUBSTANCE: TAMOXIFEN CITRATE
FORM: 30 PILLS x 20 MG
ACTIVE HALF-LIFE: 5 DAYS
DOSAGE: MEN 20-120 MG/DAY
ACNE: NO
WATER RETENTION: NO
HIGH BLOOD PRESSURE (HBP): NO
HEPATOTOXICITY: VERY LOW
AROMATIZATION: NO
MANUFACTURER: KALPA PHARMACEUTICALS
CLASSIFICATION: SELECTIVE ESTROGEN RECEPTOR MODULATOR (SERM)
ACTIVE SUBSTANCE: TAMOXIFEN CITRATE
FORM: 30 TABLETS x 20 MG
ACTIVE HALF-LIFE: ~5–7 DAYS
DOSAGE: MEN 20-120 MG/DAY
ACNE: POSSIBLE
WATER RETENTION: LOW TO MODERATE
HIGH BLOOD PRESSURE (HBP): NOT TYPICAL
HEPATOTOXICITY: RARE
AROMATIZATION: NONE
MANUFACTURER: ACTAVIS
SELECTIVE ESTROGEN RECEPTOR MODULATOR
ACTIVE SUBSTANCE: TAMOXIFEN CITRATE
FORM: 100 PILLS x 20 MG
ACTIVE HALF-LIFE: 5 DAYS
DOSAGE: MEN 20-120 MG/DAY
ACNE: NO
WATER RETENTION: NO
HIGH BLOOD PRESSURE (HBP): NO
HEPATOTOXICITY: VERY LOW
AROMATIZATION: NO
MANUFACTURER: DRAGON PHARMA
LABORATORY TESTED: VIEW LAB RESULTS