Degarelix vs Human Chorionic Gonadotropin (HCG)
Fast-acting GnRH antagonist that rapidly lowers testosterone for advanced prostate cancer treatment
A powerful hormone that mimics luteinizing hormone (LH) to stimulate your body's natural testosterone production while keeping your fertility intact—like having your cake and eating it too for men on hormone therapy.
Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team · Editorial standards
Quick comparison
Dose range
Degarelix
80–80 mg
Human Chorionic Gonadotropin (HCG)
500–1500 IU
Frequency
Degarelix
Once daily
Human Chorionic Gonadotropin (HCG)
Twice weekly
Administration
Degarelix
As directed by healthcare provider
Human Chorionic Gonadotropin (HCG)
Subcutaneous injection
Cycle length
Degarelix
Ongoing/indefinite
Human Chorionic Gonadotropin (HCG)
Ongoing/indefinite
Onset speed
Degarelix
Moderate (1-2 weeks)
Human Chorionic Gonadotropin (HCG)
Moderate (1-2 weeks)
Evidence level
Degarelix
Strong human trials (Phase 3 or FDA approved)
Human Chorionic Gonadotropin (HCG)
Strong human trials (Phase 3 or FDA approved)
Benefit ratings
Rapid Testosterone Control
Extended Duration
Clinical Efficacy
Fertility Preservation
Testicular Health
Hormone Balance
Compound specifications
Degarelix
Molecular formula
C82H103ClN18O16
Molecular weight
1632.3 Da
Half-life
~53 days (median terminal half-life)
Bioavailability
100% (subcutaneous injection)
CAS number
214766-78-6
Human Chorionic Gonadotropin (HCG)
Molecular formula
C1105H1770N318O336S26 (approximate)
Molecular weight
36,700 g/mol (approximately)
Half-life
24-36 hours
Bioavailability
High when injected subcutaneously or intramuscularly
CAS number
9002-61-3
Dosing compared
Degarelix
Subcutaneous
240 mg (two 120 mg injections)
One time (loading dose) · Single starting dose
FDA-approved loading dose for advanced prostate cancer, given as two separate deep injections under the skin of the belly. This rapidly lowers testosterone without the early surge seen with older drugs [1][2].
80 mg
Every 28 days · Ongoing
FDA-approved maintenance dose, started 28 days after the loading dose. Keeps testosterone at castrate levels in over 97% of patients [1][2].
Human Chorionic Gonadotropin (HCG)
Subcutaneous
500-1,500 IU
2-3 times per week · Ongoing with TRT
Documented clinical practice for preserving testicular function/fertility in men on testosterone therapy; 1,500-2,000 IU 2-3x/week is used for hypogonadotropic hypogonadism [6]. The popular 500 IU 2-3x/week maintenance figure reflects real-world practice rather than the FDA label. In controlled dosing, 250 IU every other day held intratesticular testosterone within 7% of baseline and 500 IU raised it 26% above baseline during testosterone administration [7]; 500 IU every other day preserved semen parameters with no azoospermia in men on TRT [8].
Intramuscular
500-1,000 IU
3 times weekly for 3 weeks, then 2 times weekly for 3 weeks · 6-week induction course
FDA-labeled regimen for male hypogonadotropic hypogonadism (Pregnyl) [7]. Intramuscular is the only labeled route.
4,000 IU then taper to 2,000 IU
3 times weekly · 4,000 IU for 6-9 months, then 2,000 IU for 3 additional months
Higher-dose FDA-labeled regimen for inducing spermatogenesis/testicular descent (Pregnyl) [7].
Best suited for
Degarelix
Men with advanced or metastatic prostate cancer requiring rapid hormone control
Degarelix is particularly well-suited for individuals focused on men with advanced or metastatic prostate cancer requiring rapid hormone control. [1][2] Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Patients who need immediate testosterone suppression to prevent cancer progression
Degarelix is particularly well-suited for individuals focused on patients who need immediate testosterone suppression to prevent cancer progression. [1][2] Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Men who cannot tolerate the initial testosterone surges from GnRH agonists
Degarelix is particularly well-suited for individuals focused on men who cannot tolerate the initial testosterone surges from gnrh agonists. [5][6] Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Human Chorionic Gonadotropin (HCG)
Fertility Preservation During TRT
If you're on testosterone therapy but want to keep your swimmers swimming, HCG is your best friend. It keeps your testes active and producing sperm even when external testosterone would normally shut that down. Research shows it can maintain or restore spermatogenesis in about 80% of men [3][4][8].
Preventing Testicular Atrophy
Nobody wants their boys to shrink. When you take external testosterone, your brain stops signaling your testes to work—and they get smaller from disuse. HCG mimics the signal (LH) that keeps them active, maintaining their size and function [6][14].
Hypogonadotropic Hypogonadism
If your pituitary gland isn't sending the right signals to your testes (low LH), HCG can step in and do the job. It's been used for decades to treat this condition, helping men achieve normal testosterone levels and fertility [3][6][13].
Post-Cycle Therapy (PCT)
After using anabolic steroids, your natural hormone production is suppressed. HCG can help jumpstart your testes back into action, speeding up the recovery of your natural testosterone production. It's often used as part of a comprehensive PCT protocol [9][15].
Side effects
Degarelix
Common
- Mild discomfort at treatment site
- Injection site pain (28% of patients)
- Injection site redness or erythema (17%)
- Hot flashes (26% experience them)
- Increased liver enzymes and gamma-glutamyltransferase (10%)
- Weight gain (9%)
- Hypertension or elevated blood pressure (6%)
- Back pain (6%)
- Chills (5%)
- Constipation (5%)
- Urinary tract infection (5%)
- Injection site swelling (6%)
- Injection site induration or hardness (4%)
- Decreased sex drive and erectile dysfunction
- Gynecomastia (breast tissue growth)
- Testicular atrophy (shrinking)
Serious
- Severe allergic reaction
Human Chorionic Gonadotropin (HCG)
Common
- Injection site reactions
- Headache
- Water retention
Uncommon
- Gynecomastia
- Mood changes
- Acne
Serious
- Blood clots
Safety & evidence
Degarelix
Evidence level
Strong human trials (Phase 3 or FDA approved)
FDA status
FDA approved for this use
Safety overview
Degarelix is an FDA-approved GnRH antagonist with safety data from Phase 3 trials and post-market use in prostate cancer treatment. [1][2] Advantages over GnRH agonists include absence of testosterone flare, allowing rapid castration without initial symptom surge. [5][6] Primary safety concerns relate to intentional hormone suppression: hot flashes occur in 40-70% of men, erectile dysfunction in 40-60%, bone density loss of 2-3% annually, [8] and cardiovascular risks in patients >65 years. [9] Injection site reactions (erythema, induration) occur in 20-30% of patients and can be severe in a small percentage. [2] Liver enzyme elevations appear in 5% of patients. [2] QT prolongation potential exists and cardiac monitoring is recommended in susceptible patients. [2]
Contraindications
- History of severe hypersensitivity to degarelix
- Allergy to any product components (mannitol or other additives)
- Active untreated severe anaphylaxis risk
Human Chorionic Gonadotropin (HCG)
Evidence level
Strong human trials (Phase 3 or FDA approved)
FDA status
FDA approved for other use
Safety overview
HCG has been used medically for over 80 years with a well-established safety profile. [10] When used appropriately for male hypogonadism or fertility preservation, side effects are generally mild and manageable. The most common issues relate to elevated estrogen from increased testosterone aromatization, which can be managed with aromatase inhibitors if needed. [6][18] Serious side effects are rare when HCG is used under medical supervision.
Contraindications
- Hormone-sensitive cancers (prostate, breast)
- Precocious puberty in children
- Known allergy to HCG or any component
- Pregnancy (in therapeutic male contexts)
- Untreated thyroid or adrenal disorders
Which is right for you?
Choose Degarelix if...
- Men with advanced or metastatic prostate cancer requiring rapid hormone control
- Patients who need immediate testosterone suppression to prevent cancer progression
- Men who cannot tolerate the initial testosterone surges from GnRH agonists
Choose Human Chorionic Gonadotropin (HCG) if...
- Fertility preservation during TRT
- Maintaining testicular size and function
- Natural testosterone stimulation
- Post-cycle therapy recovery