Stimulant Medication Prescribing Practices Within a VA Health Care System
In some cases, stimulant medications were discontinued by a prescriber secondary to a worsening of another mental health condition. More than half of the participants in this study had an anxiety disorder diagnosis. Whether or not anxiety predated stimulant use or whether the use of stimulant medications contributed to the diagnosis and thus the addition of an additional CNS depressant to treat anxiety may be an area of research for future consideration. Although bipolar disorder, anxiety disorders, psychosis, and SUD are not contraindications for use of stimulant medications, caution must be used in patients with these diagnoses. Prescribers must weigh risks vs benefits as well as perform close monitoring during use. Similarly, one might look further into stimulant medications prescribed for fatigue and assess the role of any simultaneously prescribed CNS depressants. Is the stimulant being used to treat the adverse effect (AE) of another medication? In 2 documented instances in this study, a psychologist conducted diagnostic testing who reported that the veteran did not meet the criteria for ADHD but that a stimulant may help counteract the iatrogenic effect of anticonvulsants. In both instances stimulant use continued.
Prescription Monitoring
Polysubstance use disorder (5%) was the third most common SUD recorded among study participants. The majority of those with polysubstance use disorder reported abuse/misuse of illicit or prescribed stimulants. Stimulant abuse/misuse was documented in 25 of 200 (12.5%) study participants. In several instances, abuse/misuse was detected by the LVAHCS delivery coordination pharmacist who tracks patterns of early fill requests and prescriptions reported lost/stolen. This pharmacist may request that the prescriber obtain PDMP query, UDS, or pill count if concerning patterns are noted. Lisdexamphetamine is a formulary-restricted medication at LVAHCS, but it was noted to be approved for use when prescribers requested an abuse-deterrent formulation. Investigators noticed a trend in veterans whose prescriptions exceeded the recommended maximum dosage also having stimulant abuse/misuse documented in their medical record. The highest documented total daily dose in this study was 120-mg amphetamine salts IR for ADHD, compared with the normal recommended dosing range of 5 to 40 mg/d for the same indication.
Various modalities were used to monitor participants but less than half of veterans had an annual UDS, quarterly PDMP query, and quarterly prescriber follow-up. PDMP queries and prescriber follow-up was assessed quarterly as would be reasonable given that private sector practitioners may issue multiple prescriptions authorizing the patient to receive up to a 90-day supply.7 Prescriber follow-up ranged from 1 to 15 months. A longer time to follow-up was seen more frequently in stimulant medications prescribed by primary care as compared with that of mental health.
Clinical Practice Protocol
Data from this study were collected with the intent to identify opportunities for improvement in the prescribing and monitoring of stimulant medications. From the above results investigators concluded that this facility may benefit from implementation of a facility-specific clinical practice protocol (CPP) for stimulant prescribing. It may also be beneficial to formulate a chronic stimulant management agreement between patient and prescriber to provide informed consent and clear expectations prior to stimulant medication initiation.
