8 months post-op. I struggle with energy and lack of sex drive. Can I use testosterone and Finasteride as a blocker?

Personalized medical treatment advice on the Internet without a good history and examination is inaccurate and may lead to confusion and misinformation.
Speak to your surgeon or local physician about receiving proper medical treatment(s).

Thank you for your question and photo.
Yes you can use, you should eat healthy and also take everything easy.your donar area looks good, ıt wll change with time 2week is still early. continue to ue the shampoo and any lotion that you have been given

This question is far too complex to gets answers from the internet. Your next step is to contact your primary care physician to make sure something is else is not going in. 

Hello. Interesting question but one that should be dealt with by seeing your regular medical doctor. This really doesn’t have anything to do with a hair transplant. Good luck to you.

You should see your family doctor as this is not a problem you want managed on the internet through this site.