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Precautions and Warnings With Methyltestosterone Tablets

Methyltestosterone tablets have the potential to cause breast enlargement in men, sleep apnea, and other problems. To help ensure a safe treatment process, talk to your healthcare provider before taking this drug if you have any other medical conditions. Other warnings and precautions with methyltestosterone tablets extend to people with certain allergies and women who are pregnant or may become pregnant.

What Should I Tell My Healthcare Provider?

You should talk with your healthcare provider prior to taking methyltestosterone tablets (Methitest®) if you have:
Also, let your healthcare provider know if you are:
  • Pregnant or thinking of becoming pregnant
  • Breastfeeding.
Make sure to tell your healthcare provider about any medications you are taking, including prescription and nonprescription medications, vitamins, and herbal supplements.

Specific Methyltestosterone Tablets Precautions and Warnings

Warnings and precautions to be aware of prior to taking this medication include the following:
  • Women taking methyltestosterone tablets (usually for breast cancer) should report any signs of virilization to their healthcare providers right away. Symptoms may include:
    • A deepening voice
    • Body and/or facial hair
    • Clitoral enlargement
    • Menstrual irregularities.
If the medication is stopped early on, the virilization may be at least partially reversible. If it is stopped later, the virilization may be permanent. However, you and your healthcare provider may decide for you to keep taking methyltestosterone tablets, despite virilization, if the benefits to you are significant.
  • Methyltestosterone tablets can cause or worsen an enlarged prostate. This medication also appears to increase the risk of prostate cancer. Your healthcare provider should evaluate you for prostate cancer before you start treatment and periodically thereafter.
  • This medication can potentially decrease sperm count, thereby decreasing fertility (although it can also help with certain causes of infertility related to low testosterone). Consult your healthcare provider if you experience difficulty conceiving a child while taking methyltestosterone tablets.
  • Make sure to contact your healthcare provider right away if you develop symptoms of high blood calcium levels (hypercalcemia), such as:
    • Constipation, nausea, or vomiting
    • Muscle achiness or weakness
    • Kidney stones
    • Abdominal (stomach) pain or side pain
    • Confusion or lethargy
    • Increased thirst and frequent urination.
  • Methyltestosterone tablets can increase the risk of liver problems, including liver cancer. Your healthcare provider needs to monitor your liver function periodically using standard blood tests.
  • There is some thought that oral methyltestosterone use (such as with methyltestosterone tablets) is more likely to cause liver problems than treatment with other forms of testosterone, such as testosterone injections, creams, or patches. For this reason, oral methyltestosterone therapy has fallen out of favor and has largely been replaced by other forms of testosterone replacement.
  • Androgens can cause fluid retention, which can be dangerous for people with liver, heart, or kidney disease.
  • Your healthcare provider may want to monitor your cholesterol more closely while you are on this medication.
  • Methyltestosterone tablets can cause bone problems when given to adolescents. These problems can result in a shorter-than-expected stature. A healthcare provider will need to monitor the adolescent's bones at least once every six months during treatment.
  • Breast enlargement can occur in men taking methyltestosterone tablets.
  • This medication can worsen, or possibly even cause, sleep apnea.
  • Methyltestosterone tablets can potentially react with a few other medications (see Drug Interactions With Methyltestosterone Tablets).
  • Methyltestosterone tablets are considered a pregnancy Category X medication. This means they are definitely not safe for use during pregnancy (see Methitest and Pregnancy).
  • This medication is not safe for use during breastfeeding (see Methitest and Breastfeeding).
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Methyltestosterone Tablet Information

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