it may be a duty of care to disclose, and it may be your requirement to do so. the medication bit seems suspect, i too would be wary. the mental illness component - i would only disclose if it may effect my work, man it sucks that there is still discrimination out there by employers, but there are some that do not, check the fine print out carefully. wishing you well. jamie.
keep strong
ps i have disclosed my mental illness but never had i to do with my medications.