Nonsteroidal antiandrogen: Difference between revisions

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'''Nonsteroidal antiandrogens''' are a class of drugs that prevent [[androgens]] (male hormones) from binding to [[androgen receptors]] in the body. They are used in the treatment of [[prostate cancer]] and other conditions.
{{DISPLAYTITLE:Nonsteroidal Antiandrogen}}


== Mechanism of action ==
== Overview ==
Nonsteroidal antiandrogens work by blocking the action of androgens. They do this by binding to the androgen receptor, preventing androgens from doing so. This inhibits the growth of prostate cancer cells, which rely on androgens for growth.
[[File:Bicalutamide.svg|thumb|right|Chemical structure of Bicalutamide]]
Nonsteroidal antiandrogens (NSAAs) are a class of drugs that act as antagonists to the [[androgen receptor]] (AR). They are primarily used in the treatment of [[prostate cancer]], a disease that is often driven by [[androgen]]s such as [[testosterone]] and [[dihydrotestosterone]] (DHT).


== Uses ==
== Mechanism of Action ==
Nonsteroidal antiandrogens are primarily used in the treatment of prostate cancer. They may be used alone or in combination with other treatments, such as [[surgery]], [[radiation therapy]], or [[chemotherapy]]. They may also be used to treat other conditions that are influenced by androgens, such as [[hirsutism]] (excessive hair growth) in women.
NSAAs work by binding to the androgen receptor, thereby preventing androgens from binding and activating the receptor. This inhibition of androgen receptor activation leads to a decrease in the growth of androgen-dependent tissues, such as the prostate gland.


== Side effects ==
== Clinical Uses ==
Like all medications, nonsteroidal antiandrogens can cause side effects. These may include [[hot flashes]], [[fatigue]], [[nausea]], and [[diarrhea]]. They can also cause sexual side effects, such as decreased libido or erectile dysfunction.
NSAAs are mainly used in the treatment of prostate cancer. They are often used in combination with other therapies, such as [[gonadotropin-releasing hormone]] (GnRH) analogs, to achieve maximal androgen blockade. This combination is known as [[combined androgen blockade]] (CAB).


== Examples ==
== Bicalutamide ==
Examples of nonsteroidal antiandrogens include [[flutamide]], [[bicalutamide]], and [[nilutamide]]. These drugs are all taken orally.
Bicalutamide is one of the most commonly used NSAAs. It is often prescribed as part of the treatment regimen for prostate cancer. Bicalutamide is usually administered orally and is well-tolerated by most patients.


== See also ==
=== Pharmacokinetics ===
* [[Androgen deprivation therapy]]
Bicalutamide is absorbed from the gastrointestinal tract and has a long half-life, allowing for once-daily dosing. It is metabolized in the liver and excreted primarily in the urine.
* [[Hormone therapy for prostate cancer]]
 
=== Side Effects ===
Common side effects of bicalutamide include hot flashes, gynecomastia, and gastrointestinal disturbances. Long-term use may also lead to liver function abnormalities, which necessitates regular monitoring of liver enzymes.
 
== Related Pages ==
* [[Androgen receptor]]
* [[Androgen receptor]]
* [[Prostate cancer]]
* [[Testosterone]]
* [[Dihydrotestosterone]]
* [[Gonadotropin-releasing hormone]]


[[Category:Drugs]]
[[Category:Antiandrogens]]
[[Category:Prostate cancer]]
[[Category:Hormonal antineoplastic drugs]]
[[Category:Hormone therapy]]
 
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Latest revision as of 06:02, 16 February 2025


Overview[edit]

Chemical structure of Bicalutamide

Nonsteroidal antiandrogens (NSAAs) are a class of drugs that act as antagonists to the androgen receptor (AR). They are primarily used in the treatment of prostate cancer, a disease that is often driven by androgens such as testosterone and dihydrotestosterone (DHT).

Mechanism of Action[edit]

NSAAs work by binding to the androgen receptor, thereby preventing androgens from binding and activating the receptor. This inhibition of androgen receptor activation leads to a decrease in the growth of androgen-dependent tissues, such as the prostate gland.

Clinical Uses[edit]

NSAAs are mainly used in the treatment of prostate cancer. They are often used in combination with other therapies, such as gonadotropin-releasing hormone (GnRH) analogs, to achieve maximal androgen blockade. This combination is known as combined androgen blockade (CAB).

Bicalutamide[edit]

Bicalutamide is one of the most commonly used NSAAs. It is often prescribed as part of the treatment regimen for prostate cancer. Bicalutamide is usually administered orally and is well-tolerated by most patients.

Pharmacokinetics[edit]

Bicalutamide is absorbed from the gastrointestinal tract and has a long half-life, allowing for once-daily dosing. It is metabolized in the liver and excreted primarily in the urine.

Side Effects[edit]

Common side effects of bicalutamide include hot flashes, gynecomastia, and gastrointestinal disturbances. Long-term use may also lead to liver function abnormalities, which necessitates regular monitoring of liver enzymes.

Related Pages[edit]