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Enclomiphene vs Tamoxifen: side-by-side comparison

SERM

Androxal · EnCyzix

A SERM that boosts natural testosterone without suppressing fertility. The trans-isomer of clomiphene, it stimulates LH and FSH production more effectively with fewer side effects than Clomid.

2.0/10 natty
Full breakdown →
VS
SERM

Nolvadex · Nolva · Tamox

A first-generation non-steroidal Selective Estrogen Receptor Modulator (SERM) that has been the gold standard for PCT since the 1970s. Acts as an estrogen antagonist in breast tissue and the hypothalamus/pituitary (stimulating LH/FSH release) while acting as an agonist in bone (protective) and liver. The cornerstone of most PCT protocols.

2.0/10 natty
Full breakdown →

2 / 10 natty scale / 2

Same lane

Both sit in the same class and are run for pct, health. This is a like-for-like comparison: read the gaps as real trade-offs.

The tape

Core ratings

The same three rulers every entry on the site is scored with, read head to head.

EnclomipheneTamoxifen
2.0

Natty scale

1 natural · 10 heavy

2.0
4.0

Effectiveness

Documented effect · of 5Δ0.5

4.5
2.0

Side-effect severity

Documented burden · of 5

2.0

Cost side

Body-load fingerprint

Where each one actually lands its strain, on the calculator's thirteen channels. Tap a row for what it means and which labs track it.

EnclomipheneTamoxifen

Cardiometabolic

Hormonal

Systemic

Bars show strain at each one's typical protocol, not your dose. ≈ marks values inferred from side-effect data or category rather than hand-graded. For your numbers, run the calculator.

Logistics

The vitals

EnclomipheneTamoxifen
SERM
Classmatch
SERM
Oral
Routematch
Oral
6.25-25 mg/dayOnce daily
Typical dose
10-40 mg/dayOnce daily
10 hours
Half-life
5-7 days (active metabolite endoxifen: 50-70 hours)
4-8 weeks
Typical run
4-6 weeks
Prescription only
Legal statusmatch
Prescription only
ProhibitedS4. Hormone and Metabolic Modulators
WADAmatch
ProhibitedS4. Hormone and Metabolic Modulators

Benefit side

What each is for

Shared goals carry both dots; a goal with one dot belongs to that side alone.

EnclomipheneTamoxifen
PCTHealth

Run for

PCTStimulates natural testosterone recovery after suppressive compounds.
Natural Testosterone BoostCan be used standalone to boost testosterone in hypogonadal men while preserving fertility.
Fertility PreservationUnlike TRT, maintains or improves sperm production.

Documented upside

  • Stimulates natural testosterone production
  • Preserves/improves fertility
  • Fewer side effects than Clomid
  • Effective for PCT
  • Can raise testosterone significantly

Run for

Post Cycle Therapy (PCT)Stimulates natural testosterone production by blocking estrogen negative feedback at the hypothalamus, increasing GnRH pulsatility and subsequent LH/FSH release.
Gynecomastia PreventionBlocks estrogen at breast tissue receptors, preventing and potentially reversing gynecomastia. ~70% response rate in the cited double-blind crossover trial (Parker 1986).
On-Cycle Gyno ProtectionCan be used during cycle at lower doses (10-20mg/day) specifically to prevent gynecomastia without affecting systemic estrogen levels.
Testosterone RestorationA classic study (Vermeulen & Comhaire, 1978) found 20mg/day for 10 days produced a moderate rise in LH, FSH, testosterone and estradiol in normal men; longer ~6-week courses have also been shown to significantly raise LH/FSH/testosterone via the same negative-feedback-blocking mechanism, though exact percentage increases vary between studies.

Documented upside

  • Proven PCT efficacy with decades of use
  • Specifically targets breast tissue - effective gyno prevention
  • Does not lower systemic estrogen (preserves estrogen benefits)
  • Bone-protective estrogenic effects
  • Long half-life allows for flexible dosing
+2 more on the full page

The downsides

Side effects, aligned

Each entry's documented side effects, sorted onto the same body systems so the gaps and the overlaps are visible. Tap any effect for the detail.

EnclomipheneTamoxifen
Blood viscosity
Estrogenic

None documented

Mood, sleep & CNS
Other documented effects

The exit

Hormonal fallout & recovery

What each does to your own hormone axis while on, and what leaving it costs.

EnclomipheneTamoxifen
Not required
PCT
Not required
While-on only
What sticks
Support role

Enclomiphene

This IS a PCT compound. No additional PCT needed after use.

Tamoxifen

Tamoxifen IS a PCT drug. Standard protocol: 40/40/20/20 (mg/day for 4 weeks). Start 2-3 weeks after last long-ester injection, or 3-5 days after last oral/short-ester dose. Can be combined with Clomid and/or preceded by HCG for enhanced recovery.

Read-out

How they separate

  1. 01

    Enhancement

    They land at almost the same point on the natty scale (2/10 vs 2/10): a similar distance beyond natural.

  2. 02

    Coming off

    Neither requires PCT: both leave the natural testosterone axis running.

  3. 03

    Logistics

    typical runs are 4-8 weeks vs 4-6 weeks.

  4. 04

    Tested athletes

    Both are WADA-prohibited: neither belongs anywhere near tested competition.

Generated from each entry's data file. Descriptive, not a recommendation; nothing here is medical advice.

Full breakdownEnclomiphene→Full breakdownTamoxifen→

More matchups

Clomiphene vs EnclomipheneEnclomiphene vs ToremifeneTamoxifen vs ClomipheneTamoxifen vs Toremifene