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Decapeptyl SR 3mg is a prescription-only, high-potency gonadotropin-releasing hormone (GnRH) agonist. It contains Triptorelin Acetate (3mg) formulated inside sustained-release microparticles.
It is administered as an intramuscular (IM) injection exactly once every 4 weeks (28 days). It acts on the brain to shut down the production of natural sex hormones (testosterone in men and estrogen in women) to manage hormone-sensitive medical conditions.
Decapeptyl SR uses a two-phase mechanism that alters the body’s hormonal architecture:
The Initial Surge (The 1st Week): When you receive your first injection, the triptorelin molecule stimulates your pituitary gland, causing a brief, temporary spike in luteinizing hormone (LH) and follicle-stimulating hormone (FSH). This triggers a transient surge in testosterone or estrogen levels.
The Down-Regulation Blockade (Continuous Phase): After a week of continuous contact, the medicine completely desensitizes your pituitary receptors. It shuts down LH and FSH secretion, dropping your sex hormone levels down to near-zero (castrate/menopausal baseline).
Starves the Target Tissue: Deprived of the hormones they need to grow, hormone-fueled tumors shrink, endometrial lesions degrade, and uterine fibroids reduce in volume.
Advanced Prostate Cancer: Managing locally advanced or metastatic prostate cancer, acting as a highly effective medical alternative to surgical removal of the testicles (castration). It can be used alone or combined with local radiotherapy.
Endometriosis: Treating tissue mimicking the womb lining that grows outside the uterus, reducing inflammation and severe pelvic pain.
Uterine Fibroids: Shrinking benign muscle tumors in the womb before a scheduled surgery, or managing bleeding when surgery is not suitable.
Early-Stage Breast Cancer: Adjuvant treatment in pre-menopausal women at high risk of recurrence, used alongside companion therapies (like Tamoxifen or an aromatase inhibitor) to switch off ovarian function.
During the initial 1-to-2 week testosterone spike, prostate cancer patients can experience a temporary worsening of symptoms (tumor flare). This can manifest as increased bone pain, blood in the urine, or difficulty urinating. To prevent this, oncologists standardly prescribe an oral anti-androgen pill (such as Casodex/Bicalutamide) to take for a few days before and after your first injection to act as a protective shield.
Because estrogen and testosterone are required to keep bones dense and strong, dropping these hormones causes temporary bone thinning. For endometriosis and uterine fibroids, treatment must not exceed 6 months. Doctors frequently prescribe a low-dose Hormone Replacement Therapy (HRT) known as "add-back therapy" alongside the injection to protect bone health and minimize menopausal side effects.
Unexplained or undiagnosed vaginal bleeding.
Pregnancy and Breastfeeding: Decapeptyl SR is strictly contraindicated. Pregnancy must be completely ruled out before starting treatment, and female patients should begin the injection within the first 5 days of their menstrual cycle. Use non-hormonal birth control (like condoms) throughout the therapy, as this drug cannot be relied on as a contraceptive.
Strictly Professional Intramuscular Use: Decapeptyl SR 3mg is a suspension of microscopic particles. It must only be administered via a deep intramuscular (IM) injection into the buttock muscle by a qualified doctor or nurse.
The No-Vein Rule: It must strictly never enter a blood vessel (intravascular injection).
Immediate Injection Rule: The powder must only be reconstituted using the specific suspension liquid provided in the original kit box. Because it is a micro-suspension, the vial must be swirled gently and injected immediately after mixing to prevent the particles from settling or clogging the needle.
As your body adapts to near-total hormone suppression, you will experience typical hormonal adjustments:
In Men: Severe hot flushes, night sweats, temporary erectile dysfunction, loss of libido, a reduction in testicle size, and temporary bone or back pain early in treatment.
In Women: Hot flushes, night sweats, prominent vaginal dryness, mood swings, anxiety, difficulty sleeping, headaches, and unexpected breakthrough bleeding or spotting during the first month before periods fully stop.
Localized redness, stinging, swelling, or a dull ache at the injection site in the buttock.
What happens if I delay my monthly injection by a few days?
To maintain a steady chemical barrier against your hormone production, you must receive your injection precisely every 28 days. If you miss your scheduled date, your hormone levels can begin to rebound rapidly, which can cause your symptoms to flare back up or lower the effectiveness of your therapy. Contact your clinic immediately to get your schedule back on track.
Will my normal fertility and menstrual cycle return after I finish the course?
Yes, for women treating endometriosis or uterine fibroids, your pituitary gland and ovaries will gradually wake back up after you stop the injections. Your normal menstrual period standardly returns within 2 to 3 months after your final 28-day treatment window expires.
Why does my doctor need to track my blood sugar and blood pressure?
Long-term hormone deprivation therapy can cause metabolic changes, including a reduction in sugar tolerance, shifts in cholesterol levels, or minor increases in blood pressure. If you are diabetic, you should increase the frequency of your blood glucose monitoring and share your logs with your physician.
Advanced hormone deprivation therapies require specialized climate-controlled storage ($<25^{\circ}\text{C}$), absolute supply chain integrity, and strict batch tracking to preserve the fragile microparticle delivery network. You can submit your specialist’s medical prescription and buy genuine, factory-authenticated Decapeptyl SR 3mg Vials (manufactured by Ipsen) online through Sanlive Pharmacy & Stores for secure payment and fast, reliable same-day delivery directly to your home, office, or specialist clinic within Lagos, Abuja, and Port Harcourt. We also provide nationwide delivery through our trusted specialty clinical logistics partners to deliver your essential oncology or gynecological care safely anywhere in Nigeria.
Important Notice: This information is for educational and procurement support purposes only. Decapeptyl SR 3mg is a potent, prescription-only specialized injection. Your entire treatment protocol must be initiated, administered, and routinely monitored under the direct physical care of a registered oncologist, gynecologist, or medical specialist. If you experience signs of a severe allergic reaction (such as rapid swelling of your face, lips, or tongue, severe difficulty breathing, or dizziness), alert your clinic nurse immediately or seek urgent emergency medical resuscitation at a hospital.
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