Generic name: Testosterone Undecanoate Injection [ tes-TOS-ter-one ]
Brand name: Aveed
Drug class: Androgens and anabolic steroids

Medically reviewed by Drugs.com. Last updated on May 6, 2024.

Uses of Testosterone Undecanoate Injection:

• It is used to treat low testosterone levels.

What do I need to tell my doctor BEFORE I take Testosterone Undecanoate Injection?

• If you have an allergy to testosterone or any other part of testosterone undecanoate injection.
• If you are allergic to testosterone undecanoate injection; any part of testosterone undecanoate injection; or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.
• If you are male and have breast or prostate cancer.
• If you have any of these health problems: Heart disease, kidney disease, or liver disease.
• If you are a woman. This medicine is not approved for use in women. If you are a woman using testosterone undecanoate injection, talk with your doctor if you are pregnant, plan on getting pregnant, or are breast-feeding.
• If the patient is a child. This medicine is not approved for use in children.

This is not a list of all drugs or health problems that interact with testosterone undecanoate injection.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take testosterone undecanoate injection with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Testosterone Undecanoate Injection?

• Tell all of your health care providers that you take testosterone undecanoate injection. This includes your doctors, nurses, pharmacists, and dentists.
• If you have high blood sugar (diabetes), you will need to watch your blood sugar closely.
• There may be a higher chance of prostate cancer. Talk with the doctor.
• If you have an enlarged prostate, your signs can get worse while you use testosterone undecanoate injection. Call your doctor if this happens to you.
• High blood pressure has happened with testosterone undecanoate injection. Have your blood pressure checked as you have been told by your doctor.
• High blood pressure can raise the chance of heart attack, stroke, or death from heart disease. If you have high blood pressure or heart disease, talk with your doctor.
• If you have sleep apnea, talk with your doctor. Sometimes, sleep apnea has gotten worse in people using testosterone.
• Treatment with testosterone undecanoate injection may lead to higher cholesterol and triglycerides. The effect of these changes on heart health is not known. Talk with the doctor.
• Have blood work checked as you have been told by the doctor. Talk with the doctor.
• This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take testosterone undecanoate injection.
• Blood clots have happened with testosterone undecanoate injection. Tell your doctor if you have ever had a blood clot. Talk with your doctor.
• This medicine is an anabolic steroid. Anabolic steroid drugs have been abused and misused before. Anabolic steroid abuse can lead to dependence and very bad health problems. These health problems include heart or blood vessel problems, stroke, liver problems, and mental or mood problems. Talk with the doctor.
• High calcium levels have happened with drugs like this one in some people with cancer. Call your doctor right away if you have signs of high calcium levels like weakness, confusion, feeling tired, headache, upset stomach or throwing up, constipation, or bone pain.
• If you are 65 or older, use testosterone undecanoate injection with care. You could have more side effects.
• This medicine is not approved for treating low testosterone levels caused by getting older. Talk with your doctor.
• This medicine may affect sperm in men. This may affect being able to father a child. Talk with the doctor.

How is this medicine (Testosterone Undecanoate Injection) best taken?

Use testosterone undecanoate injection as ordered by your doctor. Read all information given to you. Follow all instructions closely.

• It is given as a shot into a muscle.
• Your doctor will give testosterone undecanoate injection.

What do I do if I miss a dose?

• Call your doctor to find out what to do.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
• Signs of high blood pressure like very bad headache or dizziness, passing out, or change in eyesight.
• For males, erections (hard penis) that happen often or that last a long time.
• Trouble passing urine, pain when passing urine, passing urine in a weak stream or drips, or passing urine more often.
• Not able to control passing urine.
• New or worse behavior or mood changes like depression or thoughts of suicide.
• Enlarged breasts.
• Breast pain.
• Shortness of breath, a big weight gain, or swelling in the arms or legs.
• Upset stomach or throwing up.
• Trouble breathing when sleeping.
• Feeling sleepy during the day.
• Weakness on 1 side of the body, trouble speaking or thinking, change in balance, drooping on one side of the face, or blurred eyesight.
• Change in color of skin.
• Change in size or shape of testicles.
• Call your doctor right away if you have signs of a blood clot like chest pain or pressure; coughing up blood; shortness of breath; swelling, warmth, numbness, change of color, or pain in a leg or arm; or trouble speaking or swallowing.
• Liver problems have happened with drugs like this one. Sometimes, this has been deadly. Call your doctor right away if you have signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.

Related/similar drugs

What are some other side effects of Testosterone Undecanoate Injection?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

• Headache.
• Pimples (acne).
• Diarrhea.
• Emotional ups and downs.
• Feeling tired or weak.
• Trouble sleeping.
• Irritation where testosterone undecanoate injection is used.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Testosterone Undecanoate Injection?

• If you need to store testosterone undecanoate injection at home, talk with your doctor, nurse, or pharmacist about how to store it.

Consumer Information Use and Disclaimer

• If your symptoms or health problems do not get better or if they become worse, call your doctor.
• Do not share your drugs with others and do not take anyone else's drugs.
• Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
• Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
• This medicine comes with an extra patient fact sheet called a Medication Guide. Read it with care. Read it again each time testosterone undecanoate injection is refilled. If you have any questions about testosterone undecanoate injection, please talk with the doctor, pharmacist, or other health care provider.
• If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Frequently asked questions

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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