The study of the use of medications in treating mental disorders. Generally it includes pharmacokinetics (what the body does to medication) and pharmacodynamics (what the medications do to the body). Specific topics include protein binding (how available the medication is to the body), half-life (how long medications stay in the body), polymorphic genes (genes varying between persons), and drug-to-drug interactions (how medications affect one another).
Source: https://www.ascpp.org/resources/information-for-patients/what-is-psychopharmacology/
