Is it safe to say then that NPP @ 150mg E3D is ok then or would it be better to use NPP @ 50-75mg EOD...... As Nightwolf mentioned "Ya its ok to do the NPP e3d, phenylpropionate is not the same ester as propionate" and from what I have read this comment by Nightwolf seems to hold true.... the Phenylpropionate ester remains steady and doesnt start to decline/fall in the blood until about the 5th day after the initial injection....