There is some documentation that Nicotine is actually helpful for OCD, though I find its effects on other areas (e.g. hypervigilance etc.) mixed and dependent on the form of ingestion (smoking vs. lozenges and so on).
I suspect part of the problem might be a general sensitivity .. and the fact that it's difficult to control the release rate, e.g. I can accidentally overdose on the gum/lozenges quite easily.
I've tried a mouth spray as well, which I liked, though the dose per spray (~1mg) was also a little high.
Other than the patch (which is expensive), would the e-cigarette possibly be a preferred method for controlling ingestion?
I find it to be one of the best OTC nootropics and superior to amphetamine for ADHD. It also boosts my mood.