Side-by-side · Research reference

HCGvsTesofensine

Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.

AFDA-ApprovedHUMAN-REVIEWED12/52 cited

BPhase 3AUTO-DRAFTED10/40 cited

HCG

Glycoprotein Hormone · LH Mimetic

2,000 IUTypical dose (2×/wk)Konsam 2026 Zachariou 2026

70–90%Sperm induction rateHuijben 2026 Zachariou 2026

12–24 moTime to sperm appearanceHuijben 2026 Nariyoshi 2025

IM or SQ · 2–3×/week

Tesofensine

SNDRI · Phase 3 obesity candidate

0.25–0.5 mgDaily doseAstrup 2008

9.2 kgWeight ↓ (24 wk)Astrup 2008

Phase 3Evidence levelAstrup 2008

Oral · Once daily morning

01Mechanism of Action

Parameter

HCG

Tesofensine

Primary target

LH receptors on testicular Leydig cellsSchröder-Lange 2025

Serotonin / norepinephrine / dopamine transporters (SERT / NET / DAT)Astrup 2008

Pathway

hCG → Leydig cell LH receptor → Intracellular cAMP → Steroidogenesis pathway activation → Testosterone synthesis

Triple monoamine reuptake inhibition → ↑synaptic 5-HT, NE, DA → appetite suppression + thermogenesisAstrup 2008

Downstream effect

Elevated intratesticular testosterone, restored spermatogenesis, virilization, secondary sex characteristic developmentKonsam 2026 Zachariou 2026

Strong appetite suppression, mild thermogenic effect, weight lossAstrup 2008

Feedback intact?

No — exogenous hCG bypasses hypothalamic-pituitary axis; endogenous LH remains suppressed

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Origin

Heterodimeric glycoprotein (alpha subunit shared with LH/FSH/TSH; beta subunit confers specificity). Available as urinary-derived or recombinant formulations.

Small molecule developed by NeuroSearch (Denmark) for CNS indications, repurposed for obesityAstrup 2008

Antibody development

Rare with recombinant; possible with urinary-derived formulations

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02Dosage Protocols

Parameter

HCG

Tesofensine

Hypogonadotropic hypogonadism (monotherapy)

2,000 IU IM/SQ 2–3×/weekKonsam 2026 Zachariou 2026

Titrate to normalize testosterone (300–1,000 ng/dL) or achieve target AMH ~7.4 ng/mL.

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Combined therapy (hCG + FSH)

hCG 2,000 IU 2×/wk + rFSH 75 IU 3×/wkKonsam 2026 Nariyoshi 2025

Preferred for azoospermia; FSH added after initial hCG phase or from outset.

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Triple therapy (experimental)

hCG 2,000 IU 2×/wk + rFSH 75 IU 3×/wk + testosterone 100 mg IM q2wkKonsam 2026

May accelerate virilization; reduces hCG requirements (~30% lower cumulative dose vs monotherapy).

—

Cryptorchidism (pediatric)

500–4,000 IU IM 2–3×/week for 3–6 weeks

—

Evidence basis

RCT / Meta-analysis / FDA-approvedKonsam 2026 Huijben 2026

Phase 2b + ongoing Phase 3Astrup 2008

Duration to sperm appearance

12–24 months (median ~18 mo)Huijben 2026 Zachariou 2026

Congenital HH may require longer treatment; acquired HH responds faster.

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Route

Intramuscular or subcutaneousKonsam 2026

—

Monitoring

Serum testosterone, semen analysis q3–6mo, testicular ultrasound

Thickened seminiferous tubules (>300 μm) on ultrasound predict imminent sperm appearance.Nariyoshi 2025

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Standard dose

—

0.25–0.5 mg / dayAstrup 2008

Frequency

—

Once daily, morning

Lower / starter dose

—

0.125 mg / day

Duration

—

24 weeks per studied cycle

Form

—

Oral capsule

Timing

—

Morning to avoid sleep disruption

Half-life

—

~9 days (very long)

04Side Effects & Safety

Parameter

HCG

Tesofensine

Injection site reaction

Pain, erythema (mild, transient)

—

Gynecomastia

Aromatization of elevated testosterone to estradiol; dose-dependent

—

Testicular discomfort / Edema

Rapid testicular growth in hypogonadal males; usually self-limiting

—

Polycythemia

Elevated hematocrit from supraphysiological testosterone; monitor CBC

—

Mood / Libido changes

Variable; usually positive with normalization of testosterone

—

Acne / Oily skin

Androgen-mediated; dose-dependent

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Prostate concerns

Monitor PSA in older males; hCG restores physiological testosterone (not supraphysiological)

—

Antibody formation

Rare with recombinant; possible with urinary-derived

—

Heart rate / BP

—

Dose-dependent ↑ HR + BPAstrup 2008

Insomnia

—

Dose-related; mitigate with morning timing

Dry mouth

—

Common

Nausea

—

Common

Mood changes

—

Anxiety / agitation possible

Cardiovascular events

—

Phase 3 trial monitoring; not yet FDA-cleared

Pregnancy / OB

—

Contraindicated

Absolute Contraindications

HCG

·Androgen-dependent malignancy (prostate, breast cancer)
·Hypersensitivity to hCG or excipients
·Precocious puberty

Tesofensine

·Pregnancy / breastfeeding
·Severe cardiovascular disease
·Concurrent MAOI use

Relative Contraindications

HCG

·Untreated obstructive sleep apnea
·Severe cardiovascular disease (polycythemia risk)
·History of thromboembolism

Tesofensine

·Hypertension
·Anxiety disorder
·Insomnia

05Administration Protocol

Parameter

HCG

Tesofensine

1. Reconstitution (if lyophilized)

Add sterile water or bacteriostatic water per manufacturer instructions. Typically 1–2 mL per 5,000–10,000 IU vial. Roll gently — do not shake. Solution should be clear.

Oral capsule (investigational; not commercial).

2. Injection site

Intramuscular: ventrogluteal, vastus lateralis, or deltoid. Subcutaneous: abdomen, avoiding navel (2-inch radius). Rotate sites to prevent lipohypertrophy.

Swallow whole with water, morning only.

3. Timing

Administer 2–3 times per week. Consistent weekly schedule recommended (e.g., Monday/Thursday or Monday/Wednesday/Friday).

Morning to mitigate insomnia. Do not dose evening.

4. Storage

Lyophilized: room temperature, light-protected. Reconstituted: refrigerate 2–8 °C. Bacteriostatic water extends shelf life to ~30 days; sterile water use within 72 hours.

Room temp ≤25 °C, dry place.

5. Needle selection

IM: 21–23G, 1–1.5 inch. SQ: 25–27G, 5/8 inch. Inject slowly (30–60 seconds for IM).

Monitor BP + HR + mood. Avoid stimulants + MAOIs.