T Nation

Arimistane as AI


Is there anyone on with experience using this chemical with your TRT? I have used it before while cycling DAA and it worked well for me. I know that it states its recommended to take for 4-8 weeks max and then cycle off for 4 weeks. However I did see someone on another board say that he took 25mg a day for over a year with his TRT. Are there any stories out there of extended use with this product? Or any peer information at all would be appreciated. It seems like there isn’t much out there regarding Arimistane and TRT.


You really need to do lab work to determine if this works.
I have never seen this suggested here before.
If it then works, you need to consider what dose is needed and costs VS 1mg/week anastrozole.

arimistane (androsta-3 5-diene-7 17-dione)

7-Keto-DHEA has a number of chemical names, including:

7-Ketodehydroepiandrosterone (7-keto-DHEA)
7-Oxodehydroepiandrosterone (7-oxo-DHEA)

For the acetate ester:

7-Oxo-dehydroepiandrosterone acetate (7-oxo-DHEA acetate)
3-Acetyl-7-oxo-dehydroepiandrosterone (3-acetyl-7-oxo-DHEA)
DHEA acetate-7-one

Note: “Keto” can be substituted for “oxo” in the above names.


I have taken it before in a supplement called Erase Pro, had labs done and E2 went from 29 to 22. This was on a DAA cycle. I believe I was taking 50mg a day with those results but I am not sure. Since arimistane is a suicidal AI, im going to start slow, and only take on injection days possibly. I read a few forums where guys had successfully taken it for 1-3 years continuously, but not everyday use. These guys were using it 2-3 times a week. I’m assuming this could work considering that the its suicidal, and shouldn’t cause rebound.

The capsules I am going to get have 25mg each, which will make it easy for me to adjust my dosage. Considering using 50mg on days of injection at first to see if that helps, then I may slowly increase or decrease my doseage, depending on results.

I recently stopped all AI’s and have been letting my E2 normalize. After my last injection, I had some puffy feet and hands about 12 hours after injection.

However, I did drink 6 beers (which I know are estrogenic) and had quite a lot of salt the day before and after. Either way, im also showing high e2 symtoms, difficulty ejaculating, keeping erection, no AM wood. So my e2 isn’t crazy high, no nipple itching, but its high enough that id like to bring it down. Rx AI’s do not mix well with me, crazy headaches from drastic reduction in E2, no matter how small the dose.

Will try and do labs 3 weeks after taking it, and the cost is fairly cheap, I got a bottle of 120- 25mg caps from Olympus labs for 40 bucks.


Are you confused?

"suicidal AI"
This is meaningless. Taking 25x7mg per week VS 1mg/week anastrozole.


Not at all. Arimistane is not exemestane. Although they do compare the two because both are Suicidal AI’s.

androsta-3 5-diene-7 17-dione This is the chemical name for Arimistane. I have used arimidex and exemestane, and cant tolerate the rapid drop in estrogen, causes me massive headache along my trigeminal nerve.

What do you mean “This is meaningless” ? You lost me with that last sentence.