It is not always the case that these go hand in hand however generally medications are required to treat certain conditions. A Psychiatrist is a specialist in the area of the mind and may encourage the trial of medication to assist in treatment.
Some medications are required to have extensive assessments prior to prescribing and may not be able to be obtained from your General Practitioner. For example treatment for ADD/ADHD. These medications need to be registered with Drugs of Dependency Unit (DDU). They are generally only prescribed by a Specialist due to registration criteria’s.