I am sorry to have to tell you this but in all the 27 yrs I have been on TRT and the first 23 yrs I never felt 100% it was because Dr.'s never tried to find out why I was low to start with. They just told me I am Primary and put me on TRT.
I have seen 7 Endo's in them yrs and been taken off TRT for what they call a base line set of labs. Every time I crashed big time I went down even lower then my first set of labs. Five yrs ago I found out I am not Primary but I am Secondary I am Hypopituitary my brain dose not tell my body to make all my hormones and as I get older there levels go lower.
It was when I started to treat my other hormones over and above Testosterone that I started to feel better. I now treat my low Cortisol levels with 30 mgs a day of Cortef, I now treat my low Thyroid with 4 grains of Armour and from this my Ferritin or Iron levels are to low so I take iron pills.
I now treat my low Growth Hormones with Humatrope .3 mgs a day and my low Aldosterone levels with .1 mgs of Florinef. And to keep my Estradiol levels down I take .25mgs of Arimidex every 2 to 3 days.
In all the yrs. I have been helping men with low T I only know of one guy that stopped TRT and got his levels back up. He has a big problem with high Estradiol and his new Dr. took him off Andorgel after being on this 4 yrs and not doing well and put him on Arimidex to get his Estradiol levels down. Doing this his brain kicked in and started sending a lot of LH and FSH to his testis and his levels came back up.
I have told this to a lot of men and they tried it and it did not work for them they crashed. I don't know of any man on TRT for a time that could stop and go back to making enough T to feel good.
Here is how I found out I am Secondary I went on HCG doing 500 IU's 3x's a week over and above my 150 mg T shots a week. After the 15th. shot of HCG we did labs and my labs doubled I went form 600 to 1200.
Your can also do an ACTH Stim. test to see if your pituitay is not working right.
http://en.wikipedia.org/wiki/ACTH_stimulation_test
Or go on Clomid stopping TRT to see if your Testis jump in you can read about it in this link.
http://www.aace.com/pub/pdf/guidelines/hypogonadism.pdf
Other wise forget about it you will crash and feel dam bad and doing this it took me longer to get my levels back up.