Alternative delivery systems for agents to treat acute agitation: progress to date.

Psychomotor agitation is often associated with aggression. It is important to identify agitation early and achieve results quickly in order to prevent aggressive behavior. Strategies may include verbal de-escalation techniques, reduced stimulation, medications, or a combination of approaches. Historically, pharmacological treatments for agitation have been delivered using oral and intramuscular formulations. Although the types of medication available have not changed dramatically, different formulations have been developed recently to aid in treating this difficult condition. This paper will detail some of the newer, more novel formulations used to deliver medications to treat agitation. Formulations to be described include orally disintegrating tablets, sublingual, buccal and intranasal forms, as well as an inhalation form. Each form has a unique purpose and will aid in treatment of different populations at different levels of agitation. Of note, of the medication formulations to be discussed, only inhaled loxapine is FDA approved for acute agitation in schizophrenia and bipolar disorder and no medications are approved for 'agitation' outside of a specific disease state. The orally disintegrating tablets of olanzapine, risperidone, and aripiprazole are swallowed and enter the circulation via the portal system. They do not have a more rapid onset of action than the standard oral tablets but are useful for patients that might otherwise divert the medication. The sublingual, buccal and intranasal formulations include asenapine and midazolam. Absorption by this route is more rapid and avoids first-pass metabolism. Finally, inhaled loxapine enters the alveoli and appears quickly in the arterial circulation. All of these novel formulations require at least some cooperation but have the potential to prevent escalation and improve the experience of patients and could be considered when negotiation is possible.