Testosterone is a male sex hormone and can be used to treat disorders such as hypogonadism, impotence and delayed puberty which is caused by a lack of this hormone, according to CIGNA.com. Replacement testosterone can be administered in several different formats; one way is through testosterone injections. A physician or nurse administers the injection every two to four weeks. Testosterone injections are associated with some adverse effects or dangers.
Worsening of Sleep Apnea
Sleep apnea is a sleep disorder in which the person stops breathing intermittently during the night. Testosterone injections can make this condition worse, according to MayoClinic.com. Sleep apnea can be dangerous and life-threatening; a physician needs to evaluate the patient for this condition.
Increased Red Blood Cells
Testosterone injections can cause an increase a red blood cell counts in some patients. This can be problematic because the extra red blood cells can create an obstruction in a blood vessel and lead to a heart attack or stroke, according to the Palo Alto Medical Foundation.
Testosterone injections may also increase the size of the prostate gland. If a man already has benign prostate hypertrophy, which can cause problems with urination, testosterone injections can make this condition worse, according to the Palo Alto Medical Foundation. If a man has prostate cancer, he should not receive testosterone injections because the extra testosterone may cause the cancer to increase in size.
Some men who receive testosterone injections may develop an increase in breast size. This danger typically only occurs in adult men who are being treated for hypogonadism and may persist in some patients, according to Drugs.com.
The testicles may become smaller in some men who receive testosterone injections. In younger men, the testicles may stop producing sperm or produce fewer sperm which decreases fertility. According to the Palo Alto Medical Foundation, problems with fertility typically resolve after stopping the testosterone injections.