Antipsychotic medications are primarily used for which of the following conditions?

Antipsychotic medications are primarily used to treat mental illnesses, particularly conditions such as schizophrenia, bipolar disorder, and severe depression. These medications work by affecting neurotransmitters in the brain, particularly dopamine, to help manage symptoms such as delusions, hallucinations, and mood swings associated with various mental health disorders.

In contrast, options related to infections, heart issues, and dizziness do not align with the primary function of antipsychotic medications. Infections are typically treated with antibiotics, heart issues might require medication for blood pressure or heart rhythm management, and dizziness could be treated with antihistamines or medications specifically targeting vestibular issues, none of which fall under the category of antipsychotics. Thus, the correct response reflects the primary use of antipsychotic medications in the treatment of mental illness.