Hello and thank you for your question,
There is no interaction between Norco and testosterone levels and your Testosterone levels will not be affected. So it is safe to take Norco for neuropathic pain.
Lupron stays in your system for 4 months so hopefully hot flashes will start to be less of an occurrence and eventually will stop. Please do be aware that occasionally hot flashes continue after stopping Lupron. This is very rare but it can happen and if so, there are medications, such as Venlafaxine, that can be used to decrease frequency and severity of hot flashes.
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Best wishes and good luck,