Flunixin meglumine is a relatively potent non-narcotic, non-steroidal analgesic with anti-inflammatory and anti-pyretic properties. In the horse, Flunixin Injection is

Follistatin 1mg Single Dose Vial There is not enough data to know for sure how safe myostatin inhibitors are.  However, it is presumed that due to the small lengths of time these products are used for, any side effects are most likely not to last long term, or at least until for a few days after use