TweetAhhh, the old tren cough. It's a bltch. We've all had it. When I used to inject tren, the only thing I found that worked was keep a glass of ice cold water, gatorade, whatever, next to you. When you feel the cough coming on, sip the crap out of it like you were trying to get rid of hiccups. Just keep sipping and breathing through your nose. It has always worked for me. As for the cough, popular belief is you injected into a blood vesel.