When should the LAI be administered?
The pharmacokinetics of LAIs allow for some flexibility in terms of when an LAI needs to be administered. The package inserts of all second-generation LAIs include missed-dose guidelines. These guidelines provide information on how long one can wait before the next injection is due, and what additional measures must be taken when beyond that date. Delaying an injection may be prudent, and the missed dose guidelines will indicate when one must consider supplementing with oral medications. For patients who are in quarantine, it may be better to delay an injection until the patient ends their quarantine than to deliver the dose during quarantine. Administering an injection earlier also is usually safe; off-cycle visits may help minimize patient contact (ie, if the patient happens to be coming into the vicinity of the clinic, or requires phlebotomy for therapeutic drug monitoring), and assist in planning for possible resurgences. When appropriate, and after considering the risk of worsening adverse effects, administering a higher dose than the usual maintenance dose would provide a buffer if the next injection was to be delayed. Therapeutic drug monitoring can help to optimize dosing and avoid low plasma drug levels, which may be not be sufficient, particularly during this time of stress.12 To provide optimal protection against relapse, consider administering a dose that puts patients at the higher range of plasma drug levels.
Where can the LAI be administered, and who can give it?
For patients who usually travel to a clinic, consider arranging for a more local injection (ie, at the patient’s primary care clinic in their hometown, or at a local mental health center), and explore if the patient may be able to receive their injection in their home through a visiting nurse association (VNA). In many states (approximately 30 currently), clinicians at pharmacies are also able to administer patient injections. Clinics would do well to at least plan for alternate staffing models in the event of staff illness. A pool of individuals should be available to give injections; consider training additional staff members (including MDs who may have never previously administered an LAI but could be quickly instructed to do so) to administer LAIs. Theoretically, during a public health emergency, family members, particularly those who have a background in health care, could be trained to give an injection and provided education on LAI storage and post-injection monitoring. This approach would not be consistent with FDA labeling, however, and should only be considered as a last resort.
What safety measures can be put in place?
Face-to-face time for injection administration should be kept as brief as possible. Before the encounter, obtain the patient’s clinical information, ideally through telehealth or from an acceptable distance. Medication should be drawn ahead of time, and not in an enclosed space with the patient present. Strongly consider abandoning the traditional enclosed room for the injection, and instead use larger spaces, doorways, or outside, if feasible. As previously noted, some clinics and clinicians have used a drive-up approach for LAI administration, particularly for deltoid injections.10 Individuals who administer the injections should wear personal protective equipment, and the clinic should obtain an adequate supply of this equipment well in advance.
Lessons learned at our clinic
In our community mental health center clinic, planning around these questions has allowed us to provide safe and continuous psychiatric care with LAIs during this public health emergency while reducing the risk of infection. We have worked to transfer LAI administration to VNAs and transition patients to longer-lasting formulations or oral medications where appropriate, which has resulted in an approximately 50% decrease in in-person visits. Reducing the number of in-person visits does not need to result in less frequent clinical follow-up. Telepsychiatry visits can make up for lost in-person visits and have generally been well accepted.
As we are preparing for the next phase, routine medical health monitoring (eg, metabolic monitoring, monitoring for tardive dyskinesia) that has not been at the forefront of concerns should be carefully reintroduced. Challenges encountered have included difficulty in having VNA accept patients for short-term LAI visits, changes to where on the body the injection is delivered, and patients with SMI and their families being reluctant to depart from previous routines and administration schedules.
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