For a healthy person even to a diseased long term Medicine use is not safe.
Both are medicines...not a diet supplement.. Ashwagandha hot in potency.. its indiscriminate use may result into a blood and semen related problems.
Gokshura is a target oriented drug on urinary system..its indiscriminate use may result in to urinary calculi / stones...
Next Steps
Before prescribing a medicine it is very much need of details of personal information related to food / sleep/ work...
Health Tips
As you mentioned for bodybuilding ..
my humble opinion ....go for a diet pattern which suits you and habituated in your family..
for eg. Black Gram is a good body builder for vegans.