I completed the study a month ago now, but wanted to wait a while before posting so I could better assess before/after.
Some background - until mid-last year, my tinnitus, while loud and very annoying (4/10), was in one ear only and quite stable so I had habituated to it pretty well. However, an accidental noise exposure (something that probably would have had no impact on someone with uncompromised hearing) caused my tinnitus to develop in both ears, jump in amplitude (5-8/10) and become extremely variable and reactive to sounds. I never knew from one day to the next whether I was going to wake up (assuming I was able to sleep) to a 'good' day or 'bad' day! Habituation was impossible and I was desperate for a solution.
Initially, I saw no improvement from the Oxytocin, but they had started me on a low dose, so this was gradually increased over the course of the study. I did start to have some 'good' days again (4/10 and even lower at times), but always very unpredictable.
E.g., I might have a good week of mostly 4 or 5/10 and start feeling good about things only to have a setback the following week where levels were much higher again (for no apparent reason).
By the end of the study though, I am having more better days than bad. However, now that it's a month since I've taken it, I'm not sure there's any difference because I'm still doing better (3 days in a row this week 4/10, and even slightly lower at times during the day), so either I've improved naturally over time or there's some kind of longer lasting effect. I did reach out to the doctor 2 weeks ago (this was a 'bad' week) to ask about an ongoing prescription for Oxytocin, but then the following week was quite manageable again, so I'm going to wait a bit before pursuing further.
For what it's worth, the doctor I worked with did indicate that other patients were having quite good results but in my case, if I'm to be honest (and believe me I want this to work), it seems somewhat inconclusive other than to say I am definitely in a better place than at the start. If only I could find a solution for the 'reactive to sound' aspect which is still there, I'd be very happy.
I'll be very interested to see the complete study report when it's published.