Olanzapine (Zyprexa - Lilly), a thienobenzodiazepine that structurally resembles and binds to many of the same receptors as clozapine (Clozaril), is now available in the USA for treatment of schizophrenia and other psychotic disorders.

Modafinil (Provigil), a benzhydryl sulfinylacetamide non-amphetamine stimulant that has been used in Europe since 1995, has now been approved by the FDA for treatment of excessive daytime sleepiness associated with narcolepsy.

Three extended-release injectable formulations of second-generation antipsychotic drugs — two of risperidone (Rykindo, Uzedy) and one of aripiprazole (Abilify Asimtufii) — have been approved by the FDA for treatment of schizophrenia in adults. Rykindo and Abilify Asimtufii are also approved for maintenance treatment of bipolar I disorder in adults. Other extended-release injectable formulations of risperidone and aripiprazole have been available in the US for years (see Table 1).

The oral nonergot dopamine agonist pramipexole (Mirapex ER, and generics), which is FDA-approved for treatment of Parkinson's disease and restless legs syndrome, has been used off-label in patients with treatment-resistant depression (TRD). A double-blind, placebo-controlled trial of pramipexole augmentation in patients with unipolar TRD was recently published.

The FDA has approved a rapidly disintegrating tablet formulation of the antiepileptic drug levetiracetam (Spritam – Aprecia) for adjunctive treatment of partialonset, myoclonic, and primary generalized tonicclonic seizures. Oral and intravenous formulations of levetiracetam (Keppra, and generics) have been available for years. Although approved by the FDA only as adjunctive therapy, levetiracetam is commonly used as monotherapy for partial-onset and generalized seizures and may also be effective in treating absence seizures and seizures of Lennox-Gastaut syndrome.

Oral antipsychotic drugs used for treatment of schizophrenia, schizoaffective disorder, delusional disorder, and other manifestations of psychosis or mania are listed in Table 1. Parenteral antipsychotic drugs used for treatment of these disorders are listed in Table 2.

Two new extended-release amphetamine products have been approved by the FDA for once-daily treatment of attention-deficit/hyperactivity disorder (ADHD) in patients ≥6 years old: Adzenys XR-ODT (Neos Therapeutics), an orally distintegrating tablet, and Dyanavel XR (Tris Pharma), an oral suspension.

The FDA has approved an extended-release tablet formulation of amantadine (Osmolex ER – Vertical/Osmotica) for once-daily treatment of Parkinson's disease (PD) and drug-induced extrapyramidal symptoms (EPS) in adults. An extended-release capsule formulation of amantadine (Gocovri) was approved in 2017 for treatment of levodopa-induced dyskinesia in patients with PD.

Attention-deficit/hyperactivity disorder (ADHD) is a common chronic neurodevelopmental disorder often diagnosed in school-age children that frequently persists into adulthood.Pharmacologic treatment of ADHD has been associated with reduced risks of substance abuse, criminal behavior, unintentional injuries, serious traffic accidents, and all-cause mortality. Drugs approved by the FDA for treatment of ADHD are listed in Table 1.

Mefloquine hydrochloride (Lariam - Roche), a new antimalarial drug chemically related to quinine, has been approved by the US Food and Drug Administration (FDA) for prevention and treatment of Plasmodium falciparum and P. vivax malaria.