T Nation

Other Drugs that Inhibit Muscle Growth?

I remember a while back I read nsaids slow or stop protein synthesis. I was curious more specifically if nasas decongestants also do this? Specifically sudafed containing chlorpheniramine maleate and phenylephrine hcl.

I think they do not, but the question would be, “why do you have nasal problems?” Try to get to the source of that.

No, in fact phenylephrine may inhibit myostatin!

Chronic opiate use depresses testosterone to hypogonadal levels, which in turn causes loss of existing muscle and difficulty in gaining new muscle.

True. Just look at House’s right quad.