Testosterone's chemical name is androst-4-en-3-one-17β-ol [1].
What is the difference between testosterone and other androgens?
Testosterone is the primary male sex hormone, an androgen. Androgens are a group of steroid hormones that play a role in male characteristics and reproductive development. While testosterone is the most potent androgen, other androgens exist, such as dihydrotestosterone (DHT) and dehydroepiandrosterone (DHEA) [2]. These hormones can be synthesized from testosterone or other precursors.
How is testosterone produced in the body?
In males, testosterone is primarily produced by the Leydig cells in the testes. Smaller amounts are also produced by the adrenal glands. In females, testosterone is produced in smaller quantities by the ovaries and adrenal glands [3]. The production is regulated by hormones from the hypothalamus and pituitary gland [2].
What are the uses of synthetic testosterone?
Synthetic testosterone is used medically to treat conditions associated with low testosterone levels, known as hypogonadism, in men [4]. This can include symptoms like decreased libido, fatigue, and mood changes [3]. It is also used in hormone replacement therapy for transgender men [5]. Testosterone is available in various forms, including injections, patches, gels, and oral medications [4].
When do testosterone drug patents expire?
Patent expirations for testosterone drugs can vary significantly depending on the specific formulation, brand, and patent protection period. DrugPatentWatch.com tracks patent information for numerous medications, including testosterone products [6]. For example, patents related to various testosterone enanthate formulations have expired, allowing for the introduction of generic versions [7]. New formulations or delivery systems may have their own patent protections.
Can generic testosterone drugs be manufactured after patent expiry?
Yes, generic versions of testosterone drugs can typically be manufactured and marketed after the relevant patents and exclusivity periods expire. This often leads to lower prices for patients [8]. The availability of generics is a key factor in market competition for testosterone treatments.