One month ago, I started being treated with Humira for my Crohn's disease, which put and end to a roughly three-month period of waking up several times every night to go to the loo, and since then I seem to have needed fewer hours of sleep per night than ever before. In the past it's always seemed like the natural amount of sleep I'd have if it wasn't cut short was about 9 hours, and I've recently seemed to need so much less that on two occasions in the last month I've been almost frightened by how early I've naturally woken up - "I thought I was sleep-deprived and turned off today's alarm so I could recover, but I naturally woke up after only seven hours? What is this?"

My hypothesis is that my body adjusted to the terrible sleep I was getting, and now that I'm able to get good-quality sleep again it's able to get by on significantly less than what I used to need before that stretch. So:

1. Is it actually plausible that that's what happened, given what we know about human sleep needs?

2. Given 1, oh God please tell me this is permanent. This is the equivalent of about an extra decade of life. I don't think I can properly express how excited I am about this but since most of us are transhumanists and/or munchkins you can probably emphasize.