You will have to use the following:
1. Cabergoline, since trenbolone will increase prolactin levels.
2. N2Guard, because in spite of the fact that it is an injectable steroid, it is still somewhat livertoxic.
3. I would highly suggest using dygestive enzymes and probiotics, because trenbolone is notorious for messing with your natural flora.
4. If you will use it stacked with testosterone, you will also need to incorporate an AI, being aromasin the best one.
5. Cardarine GW has a time proven ability to greatly reduce most of trenbolone's side effects, without adding any of its own. All in all, it is a great way of adding a lot of quality to a cycle without any additional issues.