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Triptodur

Generic name: triptorelin

Brand names: Trelstar Mixject, Triptodur

Last updated November 3, 2026 0 views
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What is Triptodur?

Triptodur is a synthetic version of a hormone that controls various functions in the body.

The Trelstar brand of triptorelin is used in men to manage the symptoms of prostate cancer. Trelstar only addresses the symptoms of prostate cancer and does not cure the cancer itself.

The Triptodur brand of triptorelin is used to treat precocious puberty in boys and girls who are at least 2 years old.

Triptodur may also be used for reasons not mentioned in this medication guide.

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Warnings

Do not use if you are pregnant. Use effective birth control, and inform your doctor if you become pregnant during treatment.

Some people using Triptodur have experienced new or worsening mental health issues or seizures (convulsions). Contact your doctor immediately if you have a seizure, or notice any unusual changes in mood or behavior (such as anger, aggression, crying, or feeling restless or irritable).

Triptodur can cause a temporary increase in certain hormones, especially when you first start using this medicine. This may lead to side effects that are similar to the condition being treated.

This section was rewritten for readability and reviewed for meaning.

Before taking this medicine

You should not use this medication if you are allergic to Triptodur or similar drugs such as leuprolide (Lupron, Viadur, Eligard) or goserelin (Zoladex).

Do not use Triptodur if you are pregnant. It could harm the unborn baby. Use effective birth control to prevent pregnancy while you are using Triptodur.

Tell your doctor if you have ever had:

  • heart disease, long QT syndrome or other heart rhythm disorder;
  • a heart attack or stroke;
  • an electrolyte imbalance (such as low levels of potassium or magnesium in your blood);
  • diabetes;
  • epilepsy or other seizure disorder;
  • mental illness;
  • a bladder obstruction or other urination problems;
  • a condition affecting your spine;
  • a tumor or blood vessel problem in your brain; or
  • if you take a medicine that can cause seizures (such as an antidepressant).

Ask a doctor if it is safe to breastfeed while using this medicine.

This medicine may affect fertility (ability to have children) in men.

This section was rewritten for readability and reviewed for meaning.

Triptodur side effects

Get emergency medical help if you have signs of an allergic reaction: hives, red skin rash, severe itching, sweating; dizziness, fast heartbeats; trouble breathing or swallowing; swelling of your face, lips, tongue, or throat.

Some people using Triptodur have had new or worsening mental problems or seizures (convulsions). Call your doctor right away if you have a seizure, or any unusual changes in mood or behavior (anger, aggression, crying, feeling restless or irritable).

Triptodur can cause a temporary increase in certain hormones, especially when you first start using Triptodur. This may cause side effects that are similar to the condition being treated. Call your doctor at once if you have:

  • painful or difficult urination, burning when you urinate, blood in the urine;
  • bone pain;
  • (in children) new or worsening signs of puberty;
  • a seizure;
  • chest pain or pressure, pain spreading to your jaw or shoulder;
  • sudden numbness or weakness, slurred speech;
  • loss of movement in any part of your body;
  • increased pressure inside the skull--severe headaches, ringing in your ears, dizziness, nausea, vision problems, pain behind your eyes;
  • high blood sugar--increased thirst, increased urination, hunger, dry mouth, fruity breath odor; or
  • nerve problems--back pain, muscle weakness, problems with balance or coordination, severe numbness or tingling in your legs or feet, loss of bladder or bowel control.

Common side effects of Triptodur may include:

  • pain, swelling, itching, or redness where an injection was given;
  • hot flashes;
  • erectile dysfunction, loss of interest in sex, impotence, difficulty having an orgasm;
  • headache, bone pain, pain or swelling in your legs;
  • vaginal bleeding; or
  • cold or flu symptoms (stuffy nose, sneezing, cough, sore throat, ear pain).

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

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How should I use Triptodur?

Follow all directions on your prescription label and read all medication guides or instruction sheets.

Triptodur is injected into a muscle. A healthcare provider will give you this injection.

Triptodur is usually given once every 4, 12, or 24 weeks. Your dose schedule will depend on the strength and brand of triptorelin you are using.

Triptodur can increase certain hormones when you first start using this medicine or after each new injection. This may cause symptoms of prostate cancer or precocious puberty to get worse for a short time. These side effects should get better within 1 to 2 months. Call your doctor if your symptoms do not improve, or if they get worse while using this medicine.

You may need frequent medical tests.

This medicine can affect the results of certain medical tests. Tell any doctor who treats you that you are using Triptodur.

What happens if I miss a dose?

Call your doctor for guidance if you miss a dose or if you miss an appointment for your Triptodur.

This section was rewritten for readability and reviewed for meaning.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

This section was rewritten for readability and reviewed for meaning.

What other drugs will affect Triptodur?

Other drugs may affect Triptodur, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.

This section was rewritten for readability and reviewed for meaning.

Common questions about Triptodur

How long can I take Trelstar (triptorelin) for prostate cancer?
Trelstar (triptorelin) can be given for prostate cancer as long as it is tolerated and your doctor believes it is still safe and effective for you, which may be many years. Trelstar is intended as a long-term treatment, and despite the inevitable progression to castration-resistant prostate cancer (CRPC) in most patients receiving androgen deprivation therapies (ADT), such as Trelstar, there may still be benefits in continuing ADT in men in addition to introducing other treatment options for CRPC. Continue reading
Why is triptorelin used for prostate cancer?
Triptorelin may be used in advanced prostate cancer to lower levels of testosterone in men. Prostate cancer needs the hormone testosterone to grow. Almost all testosterone in men is made by the testicles. Triptorelin stops the testicles from making testosterone, reducing testosterone levels, and slowing or stopping the growth of cancer cells. This can help relieve symptoms such as painful or difficult urination. Continue reading

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Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.