Today I have been on testosterone 1 week. I have not noticed any physical changes, and would be surprised if I had. I have been having difficulty sleeping – I have trouble falling asleep, I wake up a lot, and I feel I’ve been sleeping really lightly and not restfully – but I’m not sure if I can attribute that to the T, as I often have bouts of insomnia. Marti says I have been irritable, but I can’t say that’s due to the T either, since it’s not uncommon for her to feel I am irritable.