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Trelstar Information

Trelstar (Triptorelin Pamoate Vial) is a medication primarily used to treat hormone-sensitive conditions. It is primarily used for the palliative treatment of advanced prostate cancer. The active pharmaceutical ingredient is triptorelin pamoate, a synthetic decapeptide, which belongs to the class of gonadotropin-releasing hormone (GnRH) agonists. Triptorelin acts as a potent stimulator of the GnRH receptors in the pituitary gland. Initially, this causes a flare effect, with a surge in the release of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH), which in turn spikes testosterone or estrogen levels. However, after about two weeks of continuous stimulation, the receptors in the pituitary gland become desensitized or downregulated. This leads to a dramatic drop in LH and FSH production, eventually reducing sex hormones to castrate levels (testosterone < 50 ng/dL) and essentially starving hormone-dependent prostate cancer cells of their primary source of energy.

Aside from its use in the treatment of prostate cancer, triptorelin has been proven useful in the treatment of endometriosis. In this condition, tissue similar to the uterine lining grows outside the uterus, leading to severe menstrual pain and fertility problems. The effects of this medication on estrogen levels help shrink endometrial-like tissue, easing pain and preventing further growth. Triptorelin can also be used in the treatment of uterine fibroids, non-cancerous growths in the uterus that can cause heavy bleeding and pelvic pain. Triptorelin reduces estrogen levels, which can help shrink fibroids and reduce symptoms like heavy bleeding and pelvic pain, often before surgical interventions.

Trelstar Side Effects

Like all medications, triptorelin appears to have a range of possible side effects. Common side effects are usually due to changes in the hormone levels. They include breast enlargement (for men), constipation, diarrhea, difficulty getting or maintaining an erection, dizziness, fatigue or weakness, headache, hot flashes (sudden sweating and feeling of warmth), indigestion, nausea, pain, redness, swelling, or itching at the place of injection, reduced genital size, reduced sex drive, skin rash, stomach pain, trouble sleeping, vomiting, and weight gain. Contact your doctor if these mild side effects persist or worsen.

During the first few weeks of using this medication, especially for advanced prostate cancer, the transient spike in testosterone can cause a flare in cancer symptoms. Adverse effects like bone pain, numbness or tingling in the hands or feet, blood in the urine, or difficulty urinating may occur during this period. Contact your doctor as soon as possible if you notice these effects during this initial phase. Stop taking this medicine and contact your doctor immediately if you experience any serious side effects, including the following:
• Allergic reactions such as breathing difficulties, body itching, body rash, skin blistering, swelling of the face, mouth, tongue, lips, or throat;
• Anemia (low red blood cells) with symptoms like dizziness, pale skin, unusual tiredness or weakness;
• Depression with symptoms like poor concentration, changes in weight, changes in sleep, decreased interest in activities;
• Heart problems with problems such as chest pain, racing, pounding, or abnormal heartbeat (specifically, Trelstar may prolong the QT interval on an EKG);
• Liver problems with symptoms such as yellow eyes or skin, abdominal pain, loss of appetite, pale stools;
• Pituitary apoplexy: a rare medical emergency involving sudden headache, vision changes, paralysis, or weakness of eye muscles, usually occurring within two weeks of the first dose;
• Problems with urination with symptoms like painful urination, blood in the urine, and inability to urinate;
• Seizures

Inform your doctor about any other side effects you notice that are not listed here.

Trelstar Precautions

Do not take this medication if you are allergic to triptorelin, other ingredients in Trelstar, or any other medicines. Before you start taking this medication, ensure that you inform your doctor about any prior or current medical conditions, including the following:
• Blood count disorders such as anemia;
• Bone conditions such as osteoporosis, as Trelstar can decrease bone mineral density;
• Depression;
• Diabetes, as triptorelin may decrease insulin sensitivity and worsen glycemic control;
• Heart disease or a history of long QT syndrome;
• High blood cholesterol, high blood pressure, kidney disease, liver disease, seizure disorders, or stroke.

This medication may interfere with your ability to drive or operate machinery. It is strongly recommended to avoid these activities until you know how the medication affects you. Your doctor will request regular blood tests to monitor serum testosterone, PSA, and blood glucose levels.

Trelstar is contraindicated in pregnancy. It can cause harm to the developing fetus by disrupting hormonal balance. Women of childbearing age should be tested for pregnancy before starting treatment. If you are using this medication for endometriosis or fibroids, you must use a non-hormonal method of contraception (like condoms) throughout treatment, as the drug can induce a flare that might trigger ovulation before suppression kicks in.

Trelstar may affect fertility due to its suppression of sex hormones. Discuss options with your healthcare provider if you are concerned about your fertility. Trelstar is not recommended for use during breastfeeding, as its effects on lactation and the infant are not fully understood. The potential for harm to a nursing infant outweighs any possible benefits. The safety and efficacy of Trelstar in children have not been well established.

Caution is advised when combining Trelstar with antiarrhythmics (drugs used for abnormal heartbeat) such as quinidine, procainamide, amiodarone, or sotalol due to the additive risk of heart rhythm issues. Since Trelstar can reduce bone density, combining it with other medications that affect bone metabolism, such as corticosteroids, should be approached with caution. Therefore, before using this medication, inform your doctor about any other medications you are currently taking, including herbal medicines and supplements, to determine whether it is safe to use with Trelstar.

Triptorelin is available as an injectable powder that must be reconstituted into an injectable solution and administered intramuscularly by a qualified healthcare provider. You must receive the entire injection within two minutes of reconstitution to prevent the triptorelin pamoate microspheres from settling or clogging the needle. Store Triptorelin vials or dose delivery systems at room temperature and protected from light and freezing. Keep it out of the reach of children.

Do I need a prescription to order Trelstar?

Yes, a prescription is required from your physician to order Trelstar.