Community Conversation => Transitioning => Hormone replacement therapy => Topic started by: Richenda on May 11, 2016, 03:04:14 AM Return to Full Version

Title: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: Richenda on May 11, 2016, 03:04:14 AM
Hi everyone,

Chatting today I realise I'm really ignorant about GnRH analogues. Can people help explain what they are and how they work? How do they differ from, say, anti androgens? So confused!

Chen x
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: Laura_7 on May 11, 2016, 05:52:55 AM

Here :

https://www.susans.org/wiki/Gonadotropin-releasing_hormone_antagonist

and here :

https://en.wikipedia.org/wiki/Hormone_replacement_therapy_%28male-to-female%29


its explained.

They have different side effects.


hugs
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: AnonyMs on May 11, 2016, 06:35:19 AM
 GnRH analogues are also incredibly expensive.
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: Richenda on May 11, 2016, 05:13:08 PM
Thanks so much for the links Laura: really helpful.

Good point on the expense AnonyMs


x
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: KayXo on May 11, 2016, 06:16:38 PM
At first, they stimulate LH production so that testicles produce MORE T but eventually, the constant stimulation of LH stops its production, thus resulting in testicles no longer producing T. Some other anti-androgens only block T (bicalutamide, flutamide), others block it and reduce it through various mechanisms (spiro, cyproterone acetate) and some reduce its conversion to DHT (finasteride, dutasteride).
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: Richenda on May 11, 2016, 10:08:04 PM
That's a very succinct summary KayXo. Thank you :)

I've often thought the easiest thing would be to whip off the testicles (not myself I hasten to add).
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: Laura_7 on May 12, 2016, 04:47:30 AM
Quote from: Richenda on May 11, 2016, 10:08:04 PM
That's a very succinct summary KayXo. Thank you :)

I've often thought the easiest thing would be to whip off the testicles (not myself I hasten to add).

There are threads on orchiectomies with descriptions and data of people who do it.


hugs
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: AnonyMs on May 12, 2016, 06:49:47 AM
This might help clarify your thoughts on whether you want to try GnRH agonists...

"Annual cost is approximately $10,000-20,000."

http://emedicine.medscape.com/article/924002-medication

Drugs in the USA are expensive, but even in Australia it was more than I cared to pay when spiro is practically free. I did actually ask my endo about it some time ago.
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: Laura_7 on May 12, 2016, 06:53:04 AM
Quote from: AnonyMs on May 12, 2016, 06:49:47 AM
This might help clarify your thoughts on whether you want to try GnRH agonists...

"Annual cost is approximately $10,000-20,000."

http://emedicine.medscape.com/article/924002-medication

Drugs in the USA are expensive, but even in Australia it was more than I cared to pay when spiro is practically free. I did actually ask my endo about it some time ago.

It may not be that much any more.

And some places cover it.


hugs
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: jenifer356 on May 13, 2016, 12:18:48 PM
After a year of E alone my T was still just slightly below male range so endo thought it might be time to try spiro - Since I take medications to control my HBP my GP and a cardio agreed to start transitioning the meds and replace them wih the spiro - 2 weeks later my potassium levels had spiked so high they were ready to hospitalize me - Fortunately the K levels dropped quick enough to prevent that but left endo to find a new solution - Last September after blood levels had stabilized again he suggested Lupron - As previously stated it super-agitates T production until it just shuts down - If/when all works well it will shut down permanently without any additional injections as long as there is a sufficient level of sex hormone (E or T) in the body - I was indeed skeptical but decided it was worth the try - $3500 (US) for a 3 month injection and insurance would not cover it as it was off label use of the drug - So it has now been 7 months and T levels are still negligible (below female levels) with only the one injection last October - So while expensive, it has worked well for me - Just keeping fingers crossed that it continues to do so

be well
jenifer
Title: Re: Help! What are GnRH analogues & how do they work? What's the difference with AA?
Post by: KayXo on May 13, 2016, 12:26:35 PM
Quote from: jenifer356 on May 13, 2016, 12:18:48 PM
it will shut down permanently as long as there is a sufficient level of sex hormone (E or T) in the body

T or E is not needed. The agonist alone will shut down permanently gonad production of sex hormones.