This medication is used in men who do not make enough of a natural substance called testosterone. Testosterone belongs to a class of drugs known as androgens. Testosterone helps the body to develop and maintain male sexual characteristics (masculinity), such as a deep voice and body hair. It also helps to maintain muscle and prevent bone loss, and is necessary for natural sexual ability/desire.Testosterone may also be used in certain adolescent boys to cause puberty in those with delayed puberty.This product should not be used in women.
How to use Testosterone Undecanoate Solution
Read the Medication Guide provided by your pharmacist before you start using this medication and each time you receive an injection. If you have any questions, ask your doctor or pharmacist.
This medication is given by injection into the buttock muscle as directed by your doctor. After the first dose, it is usually given 4 weeks later, then every 10 weeks. The dosage is based on your medical condition, testosterone blood levels, and response to treatment.
Use this medication regularly to get the most benefit from it. To help you remember, use a calendar to mark the days you will receive an injection.
Misuse or abuse of testosterone can cause serious side effects such as heart disease (including heart attack), stroke, liver disease, mental/mood problems, abnormal drug-seeking behavior, or improper bone growth (in adolescents). Do not increase your dose or use this drug more often or for longer than prescribed. When testosterone is misused or abused, you may have withdrawal symptoms (such as depression, irritability, tiredness) when you suddenly stop using the drug. These symptoms may last from weeks to months.
Nausea, vomiting, headache, skin color changes, increased/decreased sexual interest, oily skin, hair loss, and acne may occur. Pain or redness at the injection site may also occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: breast swelling/tenderness, mental/mood changes (such as depression, agitation, hostility), unusual snoring or difficulty breathing during sleep, swelling hands/ankles/feet, symptoms of liver problems (such as loss of appetite, persistent nausea/vomiting, severe stomach/abdominal pain, yellowing eyes/skin, dark urine), trouble urinating, increased urination (especially at night), too frequent/prolonged erections, fast/irregular heartbeat.
Get medical help right away if you have any very serious side effects, including: shortness of breath/rapid breathing, chest/jaw/left arm pain, unusual sweating, confusion, sudden dizziness/fainting, pain/swelling/warmth in the groin/calf, sudden/severe headaches, trouble speaking, weakness on one side of the body, sudden vision changes.
Rarely, males may have a painful or prolonged erection lasting 4 or more hours. If this occurs, get medical help right away, or permanent problems could occur.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
Before using testosterone, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients (such as benzyl benzoate, refined castor oil), which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: cancer (especially prostate or breast cancer), prostate problems (such as enlarged prostate), heart problems (such as heart failure, previous heart attack), stroke, kidney problems, liver problems, high cholesterol, difficulty breathing during sleep (sleep apnea), blood clots (such as in the leg, lungs).
If you have diabetes, this product may lower your blood sugar. Check your blood sugar regularly as directed and share the results with your doctor. Tell your doctor right away if you have symptoms of low blood sugar, such as sudden sweating, shaking, fast heartbeat, hunger, blurred vision, dizziness, or tingling hands/feet. Your doctor may need to adjust your diabetes medication, exercise program, or diet.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Children may be more sensitive to the side effects of this drug. In children, it may affect bone growth. Check your child’s height periodically.
Some men, particularly older adults, are at a higher risk for developing enlarged prostate or prostate cancer while using this medication. Your risk of prostate problems should be checked by your doctor before you start testosterone.
This medication can affect fertility in males. Ask your doctor for more details.
This medication should not be used in women, especially during pregnancy or breast-feeding. It may harm an unborn or breast-feeding baby. Consult your doctor for more details.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor’s approval.
Some products that may interact with this drug include: “blood thinners” (such as warfarin).
This medication may interfere with certain laboratory tests (including thyroid tests), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.