Hi brizzolatti,
I'm not sure that I can agree with the statement, "Then I discovered it was self certification in any case and up to the individual diver whether or not to disclose."
I don't know about Scotland, but most major training agencies in the US & greater Caribbean will query the applicant about medical history before accepting them. Additionally, many dive ops around the world will ask one to sign a medical release form prior to taking them out. In both instances, these often ask questions about medications & psychiatric illness.
One's failure to disclose under these circumstances is not only untruthful, but could have more than trivial implications for any liability litigation brought either by you or against you.
Additionally, failure to disclose to a potential/actual buddy is again less than fully honest, and deprives that person of information he rightfully deserves to have in making a decision about buddying.
I'd also like to explore the comment that, "I learned to dive when on the drug. But in many ways, it was irrelevant because I was feeling well and confident that I was well," could be problematic.
Persons with affective/mood disorder, e.g., psychiatric conditions with depressive or manic features, or both, can in the manic spectrum feel supremely well & confident, yet have compromises of judgment & impulse control that pose significant threats to safe scuba. While it is not a common side-effect, the research literature does report the apparent triggering of mild manic states by Prozac & other SSRIs, and the manufacturers of drugs in this class in fact warn of this possibility.
As such, under the condition of treatment of SSRIs I wonder about the appropriateness "feeling well & confident" as an index of fitness to dive.
What think?
DocVikingo