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Tamoxifen (Nolva)

Anti-estrogen & SERM

Nolva · Tamoxifen

Nolvadex is the cornerstone of standard PCT. Classic protocol: 40/40/20/20 mg/day over 4 weeks. Stimulates LH and FSH production to restart natural testosterone. Milder than Clomid.

Half-life

5–7 jours

Detection

Semaines

Oral

Dosages

Beginner20 mg/j (PCT)
Intermediate20–40 mg/j (PCT)
Advanced40 mg/j (début PCT)
FemaleMedical use only

Frequency : 1× / day (PCT: 4-6 weeks)

Effects

  • Estrogen receptor blocker (SERM)
  • LH/FSH restart
  • PCT

Side effects

  • Mild low libido
  • Mood changes
  • Vision (very rare)

Support supplements

ZincVitamin D3Omega-3

Synergies & stacks

Clomid (PCT if severe suppression)

Avoid

  • On-cycle use (increases IGF-1)
  • Co-use with Cardarine (interaction)

AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.

Sources

Studies and scientific publications this guide relies on.

  1. Vermeulen A, Comhaire F (1978). Hormonal effects of an antiestrogen, tamoxifen, in normal and oligospermic men. Fertility and Sterility. doi: 10.1016/s0015-0282(16)43160-2

    Étude pivot des effets endocriniens du tamoxifène (Nolvadex) chez l'homme sain et oligospermique : élévation significative de LH, FSH et testostérone par blocage du rétrocontrôle œstrogénique au niveau hypothalamo-hypophysaire, dose-réponse 10-20 mg/j.

  2. Katz DJ, Nabulsi O, Tal R, et al. (2012). Outcomes of clomiphene citrate treatment in young hypogonadal men. BJU International. doi: 10.1111/j.1464-410X.2011.10702.x

    Étude observationnelle (86 hommes jeunes hypogonadaux) : les SERM (clomiphène, tamoxifène) élèvent significativement la testostérone et améliorent les symptômes — illustre le mécanisme commun des SERM en relance HPT, transposable au nolvadex.

  3. Jordan VC (1993). Fourteenth Gaddum Memorial Lecture. A current view of tamoxifen for the treatment and prevention of breast cancer. British Journal of Pharmacology. doi: 10.1111/j.1476-5381.1993.tb13728.x

    Revue pharmacologique : tamoxifène est un SERM avec activité antagoniste sur le tissu mammaire (utilisé pour prévenir et traiter la gynécomastie) mais activité partiellement agoniste sur l'os et le foie — explique l'usage thérapeutique anti-gyno et la tolérance hépatique.

  4. Rahnema CD, Lipshultz LI, Crosnoe LE, et al. (2014). Anabolic steroid-induced hypogonadism: diagnosis and treatment. Fertility and Sterility. doi: 10.1016/j.fertnstert.2014.02.002

    Revue clinique de l'hypogonadisme post-AAS : protocoles Nolvadex 40/40/20/20 mg/j sur 4 semaines, combinaison Nolvadex + Clomid pour suppressions sévères, place dans la stratégie globale de PCT.

  5. Fisher B, Costantino JP, Wickerham DL, et al. (1998). Tamoxifen for prevention of breast cancer: report of the National Surgical Adjuvant Breast and Bowel Project P-1 Study. Journal of the National Cancer Institute. doi: 10.1093/jnci/90.18.1371

    RCT NSABP P-1 chez 13 388 femmes : tamoxifène 20 mg/j sur 5 ans réduit le risque de cancer du sein invasif de 49 % ; effets indésirables documentés : événements thromboemboliques (RR 1,6) et cancer de l'endomètre (RR 2,5), troubles visuels rares.

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AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.