Hi @Ajpius,
Welcome to the community. Great question. To answer the first part of your question is yes and no. Yes, it is possible to gain functional cure through treatment. The chances of that happening is less than 5% I believe. And no because, majority of patients do not achieve functional cure on the current antivirals in usage. On the issue of side effects, there is a discussion on this already. Check it out here:
What are the side effects of taking tenofovir.
I hope this is helpful. Bansah1