Their training has usually been in the more traditional fields of treatment, as the sole repository of knowledge. Over the years, however, they have dipped into the field of clinical social work, and have started to rely on community services as aids in helping a person attain their goals. When there are serious mental disturbances that require intermittant hospitalizations, the clinical psychologist may have a better foundation in the treatment of these serious mental health issues. He or she can prescribe medication, and monitor the response it has on the patient. Anyone taking any type of psychoactive drug should be seeing a psychiatrist at least to see how the drug is working.
Many people are comfortable talking with psychiatrists, also.
However, it is not necessary to see the same person for both aspects of treatment. There are many other professionals who have had training in one or more specific areas of mental health. Again, when you are able to find a person with whom you are comfortable and feel you are benefiting the specific degree is not relevant. The differences are more subtle than substantial. The clinical social worker may have been through a Bachelor's program first, in which extensive training and placement in agencies are part of the program.