What is Trelstar Mixject? Uses, warnings & side effects

Updated May 14, 2025  •  Published Dec 30, 2020

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Trelstar Mixject overview

BRAND NAMES:

  • Trelstar

Generic Names:

  • Trelstar Mixject

Uses:

  • Trelstar® treats advanced prostate cancer. Triptodur„¢ treats premature puberty.

Therapeutic Classes:

  • Antineoplastic Agent, Endocrine-Metabolic Agent

Forms:

  • Injectable

How it’s taken:

  • By injection

What is Trelstar Mixject used for?

What form(s) does Trelstar Mixject come in?

  • Injectable

What are common Trelstar Mixject dosages?

  • Suspension Reconstituted 3.75MG

  • Suspension Reconstituted 11.25MG

Trelstar Mixject images - What does Trelstar Mixject look like?

  • Trelstar Mixject
    11.25mg suspension reconstituted

  • Trelstar Mixject
    22.5mg suspension reconstituted

  • Trelstar Mixject
    3.75mg suspension reconstituted

How to take Trelstar Mixject

  • Missed dose: Injection routeThis medicine needs to be given on a fixed schedule. If you miss a dose, call your doctor, home health caregiver, or treatment clinic for instructions.

  • Injection routeA nurse or other health provider will give you this medicine.

  • Injection routeYour doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given as a shot into one of your muscles.

  • This medicine should come with a Medication Guide. Ask your pharmacist for a copy if you do not have one.

  • Missed dose: Injection routeThis medicine needs to be given on a fixed schedule. If you miss a dose, call your doctor, home health caregiver, or treatment clinic for instructions.

  • Injection routeYour doctor will prescribe your exact dose and tell you how often it should be given. This medicine is given as a shot into one of your muscles.

  • This medicine should come with a Medication Guide. Ask your pharmacist for a copy if you do not have one.

  • Injection routeA nurse or other health provider will give you this medicine.

What to do if you miss a dose of Trelstar Mixject

Trelstar Mixject contraindications - Who shouldn't take Trelstar Mixject?

  • This medicine is not right for everyone. You should not receive it if you had an allergic reaction to triptorelin or similar medicines.

Trelstar Mixject warnings

  • Tell your doctor if you have kidney disease, liver disease, bladder blockage, diabetes, heart or blood vessel disease, heart failure, heart rhythm problems, or a history of seizures, depression, or mental problems.

  • This medicine may cause the following problems:Changes in mood or behaviorIncreased risk for seizuresHeart rhythm problems (including QT prolongation)Changes in blood sugar levelsIncreased risk of heart attack or stroke

  • Your symptoms may get worse for a few weeks when you begin to use this medicine to treat advanced prostrate cancer. Talk to your doctor if you have concerns.

  • Your child's symptoms might get worse when you first start using this medicine to treat premature puberty, but they should get better as the medicine starts to work. If your child's condition does not begin to improve after using this medicine for 2 months, check with your doctor.

  • Tell any doctor or dentist who treats you that you are using this medicine. This medicine may affect certain medical test results.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

Trelstar Mixject interactions & what to avoid when taking Trelstar Mixject

  • Some medicines can affect how triptorelin works. Tell your doctor if you are using medicines that can increase prolactin levels in the blood or medicines to treat depression (including bupropion).

  • This medicine may cause the following problems:Heart rhythm problems (such as QT prolongation)Changes in blood sugar levelIncreased risk of heart attack or stroke

  • Your symptoms may get worse for a few weeks when you begin to use this medicine. Talk to your doctor if you have concerns.

  • Tell any doctor or dentist who treats you that you are using this medicine. This medicine may affect certain medical test results.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

Trelstar Mixject side effects - How does Trelstar Mixject make you feel?

Serious Side Effects

  • Weakness or loss of muscle control, especially in your legs or feet

  • Trouble breathing

  • Numbness, tingling, or burning pain in your hands, arms, legs, or feet

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Change in how much or how often you urinate, bloody or cloudy urine, difficult or painful urination

  • Depression, mood or behavior changes

  • Fast, slow, pounding, or uneven heartbeat

  • Heavy vaginal bleeding

  • Seizures

Less Serious Side Effects

  • Decreased interest in sex, inability to have or maintain an erection

  • Headache, dizziness

  • Warmth or redness in your face, neck, arms, or upper chest

  • Bone, back, leg, or joint pain

  • Increased hunger or thirst

  • Pain, itching, burning, swelling, or a lump under your skin where the shot was given

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