It has been answeared umpteen times on the "Steroids and Hardcore" board right here on getbig. Paraphrasing The great "Big O": "It has to do with the high benzyl alcohol content in homebrewed tren. After you inject the serum, and you pull the needle out, the tiny cappilaries, and blood vessels at the injection sight, where the needle was, are filled with the B.A from the serum. Your blood is immediatly pumping this stuff to your heart, but first passes through the lungs, which is causing the cough". To eliminate this, after injecting, leave the needle in the sight for about 30 seconds, and then pull it out fast. This will give the serum time to find it's way into the muscle, and pulling the neeedle out quickly, should all but insure that no B.A gets in to thse little blood vessels. This will eliminate your "tren cough". You are welcome. Weez