Peptide Library / Detail
Deslorelin
Half-life
Sustained release over 6-12 months from implant formulation
Delivery
Subcutaneous implant (slow-release formulation)
Dosage
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Description
Deslorelin is a synthetic gonadotropin-releasing hormone (GnRH) agonist peptide used primarily in veterinary medicine for reproductive control and hormonal manipulation. It works by initially stimulating and then suppressing the hypothalamic-pituitary-gonadal axis, leading to reversible suppression of reproductive function. The peptide is commonly administered as a slow-release subcutaneous implant for temporary contraception and management of hormone-dependent conditions in various animal species.
Usage
Typically administered as subcutaneous implants in doses ranging from 4.7 mg to 9.4 mg depending on species and body weight. In dogs, 4.7 mg implants are standard for males and females. In cats (queens), 9.4 mg implants are used. Duration of effect varies by species: approximately 6-12 months in dogs, with suppression beginning 4-6 weeks post-implantation. Implant location can affect efficacy, with interscapular placement commonly used.
Mechanism of Action
Deslorelin acts as a potent GnRH agonist that initially causes a surge in follicle-stimulating hormone (FSH) and luteinizing hormone (LH), followed by receptor desensitization and downregulation of the pituitary-gonadal axis. This results in decreased testosterone production in males and suppression of estrous cycles in females. The peptide influences androgen receptor expression and prostaglandin metabolism in reproductive tissues, leading to reversible suppression of spermatogenesis, testicular function, and ovarian activity (PMID: 41349370). In females, it can also be used at lower doses to induce ovulation before suppression occurs.
Benefits(7)
- Reversible contraception in both male and female animals
- Non-surgical alternative to permanent sterilization
- Induction of ovulation in females when used in specific protocols
- Management of hormone-dependent behavioral issues
- Reduction of testosterone-related conditions in males
- Treatment option for reproductive tract disorders
- Predictable duration of action with slow-release formulations
Side Effects(8)
- Initial hormonal surge before suppression (flare effect)
- Temporary behavioral changes during downregulation phase
- Local reactions at implant site including swelling or discomfort
- Histomorphological changes in reproductive tissues (epididymis, testes)
- Variable time to onset and recovery of fertility
- Potential for incomplete suppression in some individuals
- Changes in osteopontin expression in testicular tissue (PMID: 40795801)
- Altered serum proteomic profiles during reproductive manipulation
Deslorelin — frequently asked questions
What is Deslorelin?
Deslorelin is a synthetic gonadotropin-releasing hormone (GnRH) agonist peptide used primarily in veterinary medicine for reproductive control and hormonal manipulation. It works by initially stimulating and then suppressing the hypothalamic-pituitary-gonadal axis, leading to reversible suppression of reproductive function. The peptide is commonly administered as a slow-release subcutaneous implant for temporary contraception and management of hormone-dependent conditions in various animal species.
What is the half-life of Deslorelin?
Deslorelin has an approximate half-life of Sustained release over 6-12 months from implant formulation. The half-life determines how often you need to inject to maintain steady blood levels — use the Peptides Calculator half-life calculator to plot your specific dosing schedule and see the decay curve.
How is Deslorelin administered?
Deslorelin is typically delivered via subcutaneous implant (slow-release formulation). The Peptides Calculator app helps you reconstitute the vial with bacteriostatic water, calculate your exact dose in syringe units, and track each injection.
How does Deslorelin work?
Deslorelin acts as a potent GnRH agonist that initially causes a surge in follicle-stimulating hormone (FSH) and luteinizing hormone (LH), followed by receptor desensitization and downregulation of the pituitary-gonadal axis. This results in decreased testosterone production in males and suppression of estrous cycles in females. The peptide influences androgen receptor expression and prostaglandin metabolism in reproductive tissues, leading to reversible suppression of spermatogenesis, testicular function, and ovarian activity (PMID: 41349370). In females, it can also be used at lower doses to induce ovulation before suppression occurs.
What are the researched benefits of Deslorelin?
Studied benefits of Deslorelin include: Reversible contraception in both male and female animals, Non-surgical alternative to permanent sterilization, Induction of ovulation in females when used in specific protocols, Management of hormone-dependent behavioral issues, Reduction of testosterone-related conditions in males, Treatment option for reproductive tract disorders, Predictable duration of action with slow-release formulations. These are research findings only — Peptides Calculator does not provide medical advice; consult a qualified healthcare professional before starting any peptide protocol.
What are the side effects of Deslorelin?
Reported side effects of Deslorelin include: Initial hormonal surge before suppression (flare effect), Temporary behavioral changes during downregulation phase, Local reactions at implant site including swelling or discomfort, Histomorphological changes in reproductive tissues (epididymis, testes), Variable time to onset and recovery of fertility, Potential for incomplete suppression in some individuals, Changes in osteopontin expression in testicular tissue (PMID: 40795801), Altered serum proteomic profiles during reproductive manipulation. Always discuss potential side effects with a licensed healthcare provider before using any research peptide.