Vantas Warnings and Precautions

Specific Precautions and Warnings With Vantas

Some warnings and precautions to be aware of prior to receiving this medicine include the following:
  • You may experience an initial worsening of symptoms, such as bone pain or difficulty urinating, before your symptoms begin to improve. This is because Vantas causes an initial rise in testosterone. After a few weeks, your testosterone levels will begin to decrease. If your symptoms do not improve after this time, or are severe, contact your healthcare provider.
  • Men who have cancer that has spread to the spine or urinary tract are at risk for potentially serious urinary tract blockage or spinal pressure at the beginning of treatment, when testosterone levels are high. These problems can lead to paralysis, or even death. Therefore, if your cancer has spread to your spine or urinary tract, your healthcare provider will monitor you closely during the first few weeks of treatment.
  • Decreased bone density (bone thinning) can occur during Vantas treatment, which can cause osteoporosis and increase the risk for bone fractures. Certain people have a higher risk for this side effect, including those who:
    • Already have thin bones (have osteoporosis or osteopenia)
    • Regularly use alcohol or tobacco
    • Have a family history of osteoporosis
    • Use medications that affect bone health (such as corticosteroids and antiseizure medications).
  • In rare cases, Vantas may cause a condition known as pituitary apoplexy (a stroke of the pituitary gland). Seek immediate medical attention if you experience signs of pituitary apoplexy, such as:
  • Your healthcare provider will want to monitor your prostate specific antigen (PSA) and testosterone levels, to make sure Vantas is working for you. Other blood tests may also be needed to monitor for potential side effects. Make sure to keep all of your medical appointments with your healthcare provider.
  • Vantas has been reported to cause high blood sugar levels, which could increase the risk for developing diabetes. Your healthcare provider will monitor your blood glucose levels periodically during treatment. If you currently have diabetes, you may find that your blood sugar levels are not as well controlled after you start Vantas. In some cases, your healthcare provider may need to adjust the dose of your diabetes medications.
  • Medications like Vantas have been reported to increase the risk for strokes, heart attacks, and sudden death in men. Your healthcare provider will evaluate your risk for these problems before starting treatment, and periodically during treatment. As is always the case, you should seek immediate medical attention if you experience signs of a heart attack or stroke (see Heart Attack Symptoms and Signs of a Stroke).
  • The Vantas implant can possibly exit the body through the incision that your healthcare provider made to insert it. This rarely occurs. However, if you believe the implant is no longer in your arm, contact your healthcare provider. If the implant cannot be felt through your skin, you may need special tests (such as an ultrasound or CT scan) to locate it.
  • It is unknown if Vantas passes through breast milk. Therefore, if you are breastfeeding or plan to start, discuss this with your healthcare provider prior to receiving the drug (see Vantas and Breastfeeding).
  • Vantas is a pregnancy Category X medication, which means it should not be used in women who are pregnant or who may become pregnant (see Vantas and Pregnancy).
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Vantas Medication Information

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