On my 4th week of a test/deca cycle and while injecting in my glute, I hit a vein. I knew I did right when I popped the needle in as it actually hurt but just ended up shooting everything in. Moments later, started to feel my throat tickle and began coughing with that horrible metallic-coppery taste in my mouth. The coughing wasn't that intense but was there for about two minutes.
It was after that I got a bit concerned. For about 24 hours I had bad flu-like symptoms in that I was tired and my body ached something fierce. However, after that 24 hour period I felt perfectly fine. Injected this morning with no side effects.
Tren is a compound I'd like to do down the road, but if Tren cough is a lot worse than what I experienced, I may have to decline!