Not exactly saying I know from experience.....but....
If you have asthma, or any respiratory illness, I would reconsider with Trenbolone. Especially Enanthate. Let's just say it sucks trying to recover from 20-30 minutes of vigorous sex. I couldn't imagine having asthma and doing the same. Breathing sucks. Feels like you can't get enough air in those lungs.
Just fyi :)
Haven't really read about this before so figured I would chime in