I would get more medical consultation on the ED. Maybe form the doc who prescribed the viagra. Definitely want to make sure is it sine due to emergence of a new condition like diabetes or a blood pressure disorder.
Gut microbes can influence mood and neurotransmitters. But it seems ED is a very very unlikely side effect (only 0.0355%). Possibly under reported, but still that is a very low percentage.
factmed.com/study-HUMIRA-causing-ERECTILE%20DYSFUNCTION.phpAlso, that percentage includes many older people. only 10% of that .04% was 20-30 years old.
Still, it could be you. You might benefit from a different biologic. You might be able to go back to lesser drugs for 6 months to see how the ED responds - sort of an experiment. The more things you can learn about
your condition the better decisions your can make.
Also see
www.ehealthme.com/ds/humira/erectile+dysfunction. They report a spike in 2011 in ED reports. I don't know if this reflects a new patient group getting approved, or if it might even be the manufacturer suppressing information. Spikes this pronounced and spread over several years) are hard to explain as just chance.
You should also talk more on support boards or even see a counselor. I lost function due to diabetes, and several years later a pituitary tumor eliminated most libido, so I don't miss function as much as if I still had libido. But when I still had libido, I found ways to be intimate and sexual. The only choice is not celebacy.
Just like an ostomy is not the only choice on the surgery end, celibacy is not the only choice on the ED end. While it sucks for any part of your health and function to be less than you want, it is important to keep perspective and not make it so black and white and harsh.
Even if further consultations weren't able to help, and even if you could not taper Humira today because you start flaring, this does not tell the story of the rest of your life. In just a few years there will be new drug options. Maybe there will be one for you with no ED side effect.
Stay healthy, avoid colon cancer, try to find intimacy you can enjoy, and continue to seek to confirm Humira, as well as to find other ED treatments. Avoid depression.
Good luck