Drugs that have the potential for abuse and dependence are called controlled substances. The classes of controlled substances are:
Schedule 1: high abuse and dependence potential, typically only used for research purposes and unable to be prescribed legally
Schedule 2: highest potential for abuse and dependence that have medicinal purposes (Example: Adderall)
Schedule 3: less potential for abuse and dependence than those in schedule 2, clear medicinal use (Example: Codeine, Vicodin)
Schedule 4: less potential for abuse and dependence than those in schedule 3 (Example: Valium, Ativan, Klonopin)
Schedule 5: lowest potential for abuse and dependence (Example: Lomotil)

I'm not sure exactly what meds are you asking about. SSRIs (Prozac, Lexapro, Celexa) and SNRIs (Effexor, Cymbalta) and not controlled substances and therefore do not have the potential for abuse or dependence. However, these meds should not be discontinued without medical direction because they are likely to cause withdrawal effects.

Anti-psychotic meds such as Zyprexa and Seroquel are not controlled substances either