Originally Posted by: Online Community MemberI asked my consultant about that issue of bicalutamide pushing testosterone up.
He said whilst it does, it blocks every cell from using it , not just the cancer cells.
So is it the case you will have a high testosterone rate ( mine went to 33 for the short period i was on it) but none of it is used by the body?
And also when you stop bicalutamide, does testosterone recovery happen sooner than with e.g decapeptyl
This is partly correct. Androgen receptors can't use the Testosterone because the Bicalutamide blocks them, and that's the way many things in your body use Testosterone. Actually, your Testosterone level increases because the Bicalutamide blocks the androgen receptors in your hypothalamus and pituitary glands which monitor and adjust your Testosterone level, because it stops these glands seeing your Testosterone so they think you need some more.
However, there are other ways too. For example, Testosterone is used to create Estrogens in men, which are also pretty essential for men, although not at the level found in women. When you're on hormone therapy injections which switch off Testosterone, you also lose your Estrogen, and it's that which causes osteoporosis, and significantly contributes to hot flushes. However, on Bicalutamide (and no hormone therapy injections), your Estrogen levels increase because your Testosterone level is higher. The raised Estrogen level causes your bones to strengthen (opposite of osteoporosis). Breast tissue can't see any Testosterone because the androgen receptors are blocked by the Bicalutamide, but they do see the raised Estrogen level, and this is the signal they use to detect a girl reaching puberty and causes breast tissue to grow (gynecomastia in men). Tamoxifen is a selective Estrogen and Androgen blocker, blocking the Estrogen receptors in breast tissue which therefore usually stops breast gland growth, but it doesn't block the Estrogen receptors in bone, so you still benefit from increased bone strength.
Recovery from Bicalutamide is faster than for hormone therapy injections, but it does still take a couple of months to flush out of your system.
Edited by member 29 Apr 2023 at 20:54
| Reason: Not specified