Tren cough related to ester?

[steropower]

I believe it is ester, it is also somewhat explained in the profile http://www.steroid.com/Trenbolone-Enanthate.new.php I have never even came close to tren cough with Tren E and got Tren cough 3 times with Tren A, and with Tren A I always got that strange taste in my mouth right after injection and never got that with Tren E.

Was your Tren E and A always the same brand?