Choosing among the long-acting injectable antipsychotics: an evidence-based pragmatic guide.

In this review, the aim is to differentiate between the 3 second-generation antipsychotics available as long-acting injectables (risperidone/paliperidone, aripiprazole, and olanzapine) and their varied formulations. Differences and similarities among the available products are discussed, including the amenities of care: route of administration (intramuscular or subcutaneous), injection frequency, needle gauge and length, injection volume, injection site, reconstitution procedures, initiation with oral medication or multiple injections, refrigeration requirements, post-injection observation requirements, drug-drug interactions preventing use or requiring dosing adjustments, adjustments requirements for late or missed doses, availability of patient assistance programs, and access barriers for off-label use. Effectiveness in acute and maintenance treatment are reviewed using the metrics of number needed to treat and number needed to harm.