Testosterone solution is the first testosterone topical solution approved for application via an armpit (underarm) applicator. Testosterone solution is used to treat adult males who have low or no testosterone. Other forms of testosterone replacement therapy include: oral tablets, buccal tablets, subcutaneous pellets, transdermal patches, injections and topical gels applied by the hands.
Testosterone deficiency is a clinical condition in which the testicles, hypothalamus or pituitary gland is affected by disease or damage that results in decreased testosterone production. Testosterone deficiency also may be known as hypogonadism or low testosterone.