IML products work better with a test base!! I am on HRT script throughout the year and I run PH's all the time with it. Allows me to make awesome gains and stay 100% legal.
But like someone mentioned, if you are going to be tested for consistency which happens to new HRT patients, the products will test you too high at which time the doctor might eliminate or lower your prescription which you don't want.
Once you have a solid year or two under your belt, they really don't fuck with you as much or ask you for blood work often or at all.