The question is not "will the FAA find out?" We can't advise you to lie or otherwise cheat on your medical. I can tell you that when they do find out and you're not DEAD in the wreckage of the incident, you're going to be in deep doodoo (i.e., you can expect to lose ALL your certificates).
Now if the question is, I was prescribed an anti-depressant and now what do I do, that is a different question. The answer will depend on:
1. Why you were prescribed it.
2. If you took it and how long a period.
3. How long it's been since you stopped if you did.
If you have an ACTUAL question rather than a vague hypothetical (especially one that would imply you intend to commit a crime just because you don't believe you can be detected), then ask it.
I know of two friends who were pilots who were found post-mortem in air crashes to have been taking substantial amounts of banned substances and for reasons that likely would have been disqualifying as well. Did it cause the crashes that killed them? I would tend to think not, but boy even after death it's caused substantial problems for their surviving family.
Now if the question is, I was prescribed an anti-depressant and now what do I do, that is a different question. The answer will depend on:
1. Why you were prescribed it.
2. If you took it and how long a period.
3. How long it's been since you stopped if you did.
If you have an ACTUAL question rather than a vague hypothetical (especially one that would imply you intend to commit a crime just because you don't believe you can be detected), then ask it.
I know of two friends who were pilots who were found post-mortem in air crashes to have been taking substantial amounts of banned substances and for reasons that likely would have been disqualifying as well. Did it cause the crashes that killed them? I would tend to think not, but boy even after death it's caused substantial problems for their surviving family.