Optimizing outcomes when treating functional neurological disorder in acute care settings: case reports depicting the value of diagnostic precision and timely and appropriate psychological interventions using an interdisciplinary framework.

Introduction: Unexplained physical signs and symptoms represent a significant portion of patient presentations in acute care settings. Even in cases where a patient presents with a known medical condition, functional or somatic symptoms may complicate the diagnostic and treatment processes and prognostic outcome. One umbrella category for neurologically related somatic symptoms, functional neurological disorder (FND), presents as involuntary neurological symptoms incompatible with another medical condition. Symptoms may include weakness and/or paralysis, movement disorders, non-epileptic seizures, speech or visual impairment, swallowing difficulty, sensory disturbances, or cognitive symptoms (1). While FND presents as neuropsychiatric, providers commonly report feeling hesitant to diagnose these disorders. Inexperience or lack of appropriate education on relevant research regarding evidence-based practices or standard of practice (SOP) may result in over- or underperforming diagnostic workups and consultations, utilizing inappropriate medications, and failing to offer evidence-based psychological interventions. Being mindful of these challenges when treating patients presenting with functional symptoms in acute care settings can help to support and protect the patients and care team and appropriately control healthcare costs. Methods: The University of Alabama at Birmingham Medical Center identified cases representing categories of quality and safety problems that arise in treating FND in acute care settings. Patients signed a consent form to participate in the case report. The case information for each was presented without identifying information. Discussion: The cases highlight potential challenges when caring for patients presenting with FND in acute care settings. The challenges covered include over- or underutilization of diagnostic workups and consultation, over- or underutilization of psychopharmacological medications, and over- or undertreating a medical condition when a functional symptom is present. In each case, these lapses and errors caused the patient distress, additional treatments, care delays, and delayed symptom remission. Additionally, these challenges have direct and indirect fiscal costs, which can be mitigated with the appropriate education and training, resources, and protocols. Hospitals can benefit from system-wide SOP to improve the identification and management of FND to prevent harm to patients. An SOP commonly presents to specific specialties and ensures the appropriate diagnostic workup, consultations, and timely evidence-based interventions.

New-Onset Prolonged Psychosis Following Synthetic Cannabinoid Use in an Older Patient: A Case Report.

Synthetic cannabinoids (SCs), a class of new psychoactive substances (NPS) commonly known as "spice," has rapidly gained popularity and become the most ubiquitous NPS on the illegitimate drug market. SCs, unlike natural cannabis (NC), are not controlled by international drug conventions, posing a significant risk to public health. These substances are easily accessible, relatively inexpensive, and challenging to detect in routine drug screenings. The existing literature provides strong evidence of an association between NC use and psychosis, but there is significantly less data on SC psychosis. We present a clinical case report of a 51-year-old African American female with no known psychiatric history who was admitted to the inpatient psychiatric unit after reported paranoia and altered mental status for the preceding six days. During hospitalization, she exhibited disorganization, persecutory delusions, extreme agitation, and bizarre behaviors that included the concealment of a set of stolen keys in her vagina, necessitating an ethics consult. After consideration of differentials, the patient was diagnosed with substance-induced psychotic disorder secondary to SC. The patient was stabilized on 3 mg Risperidone at bedtime. After 16-day hospitalization, she reached her baseline and later revealed that she had recently smoked SC for the first time. The primary goal of this case is to highlight the sequelae of SC-associated psychosis. A SC-associated psychosis could drastically vary from NC and is often undetectable on a typical UDS, which may result in a lifelong primary psychotic disorder misdiagnosis.

Manic episode following psilocybin use in a man with bipolar II disorder: a case report.

There has been an increase in research on the topic of psychedelic substances and their effects as treatment options in neuropsychiatric conditions. Psilocybin is a psychedelic drug that has recently garnered increased interest as an effective treatment modality for treatment-resistant depression, depression associated with terminal conditions, certain substance use disorders, and obsessive-compulsive disorder. However, sparse data exist as to the effects that psilocybin might have on patients at risk for mania, in large part secondary to the exclusion of this patient population from studies due to the concern for inducing mania or worsening illness course. We describe a case of a 21-year-old male with a recent diagnosis of bipolar II disorder who developed a manic episode following the ingestion of psilocybin in the form of hallucinogenic mushrooms. Given the incidence of depression in those with bipolar disorder, impulsivity, and a tendency to abuse substances associated with the illness, further research is needed into the risks of psilocybin and other psychedelic use in those with bipolar disorder.

Delta-8-THC association with psychosis: A case report with literature review.

Background: Cannabis (Δ9-THC) is the most commonly consumed illicit drug. The Agricultural Improvement Act of 2018 removed hemp, a strain of Cannabis sativa, as a controlled substance. This law allowed the plant to be processed into its components, which contain <0.3% Δ9-THC. As a result, delta-8-tetrahydrocannabinol (Δ8-THC), a federally unregulated substance, grew in popularity in 2020. Δ8-THC is readily available in most gas stations or head shops and may be considered harmless by patients. However, an increasing number of patients admitted for psychiatric hospitalization report use, with limited literature on the effects. Case presentations: This case report describes three individual cases of patients who required admission to a university psychiatric hospital after the regular use solely of Δ8-THC. All three patients developed psychotic and paranoid symptoms concurrently with the use of Δ8-THC, with a severity exceeding their previous historical presentations. The presenting psychotic symptoms were also atypical for all three patients. New-onset violence and visual hallucinations were noted in two of the patients, one patient with no previous psychiatric history and one patient while on a therapeutic dose of his antipsychotic. In the third case, a new onset of bizarre, fixed delusions of puppies dissolving in the bathtub developed. Conclusion: This report adds to the limited body of evidence on Δ8-THC documenting a temporal association between Δ8-THC use and the development of psychotic symptoms. A strong body of research already correlates the continued use of Δ9-THC with psychosis, and Δ8-THC acts at the same CB1 and CB2 receptors as Δ9-THC. Therefore, it is hypothesized that Δ8-THC may have similar adverse psychiatric effects as Δ9-THC. These conclusions are not without speculation, due to the need for self or collateral-reporting of Δ8-THC use as urine drug screening cannot distinguish Δ8-THC from Δ9-THC, and the patients' symptoms could be explained by medication non-adherence and primary psychotic disorders. However, physicians should be encouraged to gather a specific history of Δ8-THC use and treat patients with Δ8-THC-related intoxication and symptoms.

Use of a Novel Standardized Administration Protocol Reduces Agitation Pro Re Nata (PRN) Medication Requirements: The Birmingham Agitation Management (BAM) Initiative.

BACKGROUND: Agitation management is a principal challenge on inpatient psychiatric units. Overreliance on common prescribing strategies of pro re nata (PRN) medication administration is problematic, given the tendencies to have overlapping or unclear indications. OBJECTIVE: Piloted project to determine whether a standardized protocol for agitation intervention may reduce PRN medication administration. METHODS: The Birmingham Agitation Management (BAM) interdisciplinary team uniquely connected the Brøset Violence Checklist (BVC) for assessment of agitation severity to a standardized PRN medication order set. Nurses on the piloted unit were trained on how to score the BVC and administer medications. Patients were assessed by the BVC every 4 hours and, based on their score, would receive no medication, low-dose benzodiazepine, high-dose benzodiazepine, or high-dose benzodiazepine plus antipsychotic. The primary end point compared the number of PRNs administered after novel protocol implementation with a retrospective cohort. Secondary measures included analysis of medication-related effects, seclusion, and physical restraint rates. RESULTS: 377 patients were included in the final analyses (184 pre-BAM, 193 BAM intervention group). No significant differences were seen in patient characteristics between groups. The total number of PRNs administered decreased by 42.5%, with both the mean and median number of administrations decreasing significantly (95% confidence interval [CI] = [1.68-5.75]; P < 0.001). A trend was noted between the number of PRNs administered and seclusion rates, but did not reach statistical significance (95% CI = [-7.28 to 60.31]; P = 0.124). CONCLUSIONS: In seemingly the first initiative of its kind, we found that a standardized agitation management protocol can help decrease the total number of PRN administrations for agitation without worsening of restraint rates and may possibly reduce the risk of adverse effects. These results require validation in specific, larger populations.

Using a tele-behavioral health rapid intake model to address high demand for psychotherapy at an academic medical center during COVID-19.

Background: Long wait times for mental health appointments have been a chronic dilemma for academic medical centers. This problem intensified worldwide with the onset of the COVID-19 pandemic. Approximately 70% of mental health services experienced pandemic-related disruption in care provision, while simultaneously experiencing a substantial increase in patient demand. Wait times for mental health appointments also increased, varying across populations from 3 to 18 months. As prolonged wait time is positively associated with severity of psychiatric symptoms and negative outcomes, the authors implemented a novel rapid intake telemedicine clinic model to shorten wait time and increase patient access to psychological care at an academic medical center. Methods: To address an overwhelming influx of mental health referrals and a growing wait-time-until-first appointment at an academic medical center serving as a lone safety net hospital during the COVID-19 pandemic, a 5-provider Psychology Rapid Intake Team was established using a hybrid of telehealth and in-person appointments based on patient preference. Data on new patient volumes, wait time for 1st appointment, and wait time to begin therapeutic intervention were compared during the same calendar 3-month period immediately prior to and following implementation of the rapid intake clinic. Results: A paired-samples t-test was conducted to compare new patient volumes pre- vs. post- intervention. Results revealed a significant increase in the number of new patients the providers were able to accommodate in the post-implementation (M = 62.00, SD = 7.21) compared to the pre-implementation (M = 31.00, SD = 2.61) condition; t(2) = -8.60, p < 0.05. There was a significant decrease in the average wait times for 1st appointment post-implementation (M = 24.99, SD = 2.38) compared to the pre-implementation (M = 37.32, SD = 1.47) condition; t(2) = 5.56, p < 0.05. In addition, days to begin therapeutic intervention decreased dramatically (394%) from the pre- (M = 142.50) to post-implementation (M = 28.84) period. Conclusion: The COVID-19 pandemic strained a mental healthcare system which led to increasingly long wait times for intake appointments and delayed psychotherapy interventions. The Psychology Rapid Intake Team initiative served to improve access, reduce patient risk related to prolonged wait times, and accelerated patient engagement with psychotherapy services. The model can serve as a unique, sustainable infrastructure for behavioral health delivery for low acuity mental health problems in large health care systems.

Struggling to find Effective Pharmacologic Options for Akathisia? B-CALM!

Akathisia is a movement disorder affecting the trunk and limbs, characterized by subjective and objective restlessness. Key signs include continual, repetitive rocking, leg shuffling, and fidgeting. Antipsychotic-induced akathisia is optimally managed by reducing the medication dose or switching to a second generation antipsychotic that is less prone to inducing akathisia. However, since medication changes are often not feasible, we review the available classes of rescue agents for akathisia symptoms. The fitting acronym, "B-CALM", which stands for Beta-blockers, Clonazepam, Anticholinergics, cLonidine and Mirtazapine, will assist prescribers in facile recall of evidence-based treatment options for akathisia. Pharmacological agents such as mianserin, trazodone, Vit B6, amantadine, gabapentin, and pregabalin have also been examined as treatment options for antipsychotic-induced akathisia. Although initial exploratory reports on these agents have been promising, the current evidence is insufficient. Akathisia has a good prognosis when managed early in the course of treatment. A variety of safe rescue agents are available for the management of this condition, however, current evidence best supports the use of propranolol and mirtazapine.

Lithium-Associated Hyperparathyroidism Followed by Catatonia.

OBJECTIVE: To familiarize the medical community with the less common adverse effects of lithium on parathyroid function, we present a case of lithium-associated hyperparathyroidism followed by the development of new-onset catatonia in a patient with schizoaffective disorder. METHODS: To allow for the safe resumption of lithium, the patient received laboratory screening of serum lithium, blood urea nitrogen, serum creatinine, calcium, and thyroid-stimulating hormone levels. The hypercalcemia was evaluated by measuring parathyroid hormone (PTH), ionized calcium, and 25-hydroxy vitamin D levels. RESULTS: A 58-year-old man with longstanding schizoaffective disorder was admitted for worsening psychotic symptoms following noncompliance with his risperidone and lithium regimen. Exploratory laboratory tests (hospital day 5) showed an elevated PTH level of 72 (reference, 15-65) pg/mL, ionized calcium level of 1.4 (reference, 1.03-1.23) mmol/mL, and a serum calcium level of 11.3 (reference, 8.4-10.5) mg/dL. After the discontinuation of lithium (day 6), anergia (day 7), mutism, and posturing (day 10) developed. Worsening catatonic symptoms of negativism and poor oral intake necessitated dehydration management with intravenous isotonic saline (day 24). The hypercalcemia persisted for 6 weeks. Treatment with cinacalcet (day 43) rapidly normalized the serum calcium levels (day 44). The catatonia, depression, and psychosis began resolving when clozapine (day 50) and electroconvulsive therapy (day 59) were initiated. PTH levels did not normalize until day 82. CONCLUSION: This report describes a case of prolonged hyperparathyroidism and hypercalcemia following treatment with lithium. Catatonia is unusual in patients with lithium-associated hyperparathyroidism but this report suggests that in settings yet to be determined, it is related to hypercalcemia of this syndrome.

Telepsychiatry and Medical Insurance: Comparative Perspectives Between India and the United States.

Telepsychiatry is a cost-effective alternative to in-person psychiatric consultations. The COVID-19 pandemic brought about a sharp spike in the utilization of telepsychiatry due to ongoing restrictions on gatherings and traveling. In recognition of the importance of telemedicine in general, and telepsychiatry specifically, telemedicine practice guidelines and telepsychiatry operational guidelines have been released. Due to the rising trend in telemedicine, the Insurance Regulatory and Development Authority of India (IRDIA) incorporated teleconsultation health insurance coverage at a level on par with regular in-person consultations. In contrast, in the United States of America, private insurance coverage for telepsychiatry has been in vogue for some time. In this paper we draw comparisons between India and the United States on telepsychiatry and health insurance. We compare the evolving regulatory policies of these two countries in relation to existing insurances plans that are available, the challenges in implementation of new regulations and the possible ways to overcome the challenges to make telepsychiatry affordable to all.

Sensory Reduction on the General Milieu of a High-Acuity Inpatient Psychiatric Unit to Prevent Use of Physical Restraints: A Successful Open Quality Improvement Trial.

BACKGROUND: Impaired sensory gating in patients with acute mental illness predisposes to overstimulation and behavioral dyscontrol. OBJECTIVE: Explore use of sensory reduction interventions on a high-acuity inpatient milieu to reduce high assault/restraint rates. DESIGN: A multidisciplinary team using failure mode and effect analysis to explore high restraint use between 4:00 p.m. and 7:00 p.m. observed patient/staff overstimulation contributed to behavioral escalations. The team implemented sensory reduction/integration improvements over a 5-month period to prevent excessive restraint use. RESULTS: Restraint rates dropped immediately following light and sound reduction interventions and by 72% at 11 months postimplementation. Mann-Whitney statistics for unpaired 6-month comparisons, 1-year pre- and postintervention showed significant reductions: Assault rates (median pre = 1.37, post = 0.18, U = 4, p = .02); Restraint rates (median pre = 0.50, post = 0.06, U = 0, p = .002). CONCLUSION: Sensory reduction during a high-stress time period on a high-acuity psychiatric unit was associated with a reduction in assaults and restraints.

Psychosis as a sequelae of paraneoplastic syndrome in Small- Cell Lung Carcinoma: A psycho-neuroendocrine interface.

In 2013 more than 150,000 Americans died from all types of lung cancer. Small cell lung cancer (SCLC) represents about 13% of all lung cancers and is notoriously associated with paraneoplastic syndromes (PNS). Here we present an interesting case of psychosis associated with one such PNS-- ectopic Cushing syndrome of SCLC. A 56 year old African-American male with no prior psychiatric history who was diagnosed with SCLC two months prior, presented to the ER for treatment of a right arm laceration he sustained while fighting off attackers, with high concern these individuals may have been part of hallucinatory experiences and well-systematized persecutory delusions regarding his wife. Physical assessment was notable for Cushingoid symptoms. Initial results of serum ACTH and cortisol were 221pg/ml (10-50pg/ml) and 37.1 mcg/dl (10-20mcg/dl) respectively. For psychosis, patient was started on Olanzapine which was titrated from 5 to final dose of 10mg nightly. Since patient was not a surgical candidate, he was treated with metyrapone 250 mg BID and radiation therapy was continued throughout hospitalization. Serum Cortisol level decreased steadily after initiation of metyrapone and psychotic symptoms dramatically reduced on olanzapine, metyrapone, and radiation therapy with apparently resolved persecutory delusions at discharge. This case broadens the available literature and provides data on successful symptomatic treatment with olanzapine while biological treatments of the underlying condition were beginning to take effect. As SCLC remains an important cause of morbidity and mortality in the US, it is imperative that physicians be aware of paraneoplastic syndromes and their psychiatric sequelae.

Dextromethorphan in Cough Syrup: The Poor Man's Psychosis.

Dextromethorphan (3-methoxy-N-methylmorphinan), also known as "DXM" and "the poor man's PCP," is a synthetically produced drug that is available in more than 140 over-the-counter cough and cold preparations. Dextromethorphan (DXM) has overtaken codeine as the most widely used cough suppressant due to its availability, efficacy, and safety profile at directed doses. However, DXM is subject to abuse. When consumed at inappropriately high doses (over 1500 mg/day), DXM can induce a state of psychosis characterized by Phencyclidine (PCP)-like psychological symptoms, including delusions, hallucinations, and paranoia. We report a noteworthy case of severe dextromethorphan use disorder with dextromethorphan-induced psychotic disorder in a 40-year-old Caucasian female, whose symptoms remitted only following treatment with a combination of an antipsychotic and mood stabilizer. While some states have begun to limit the quantity of DXM sold or restrict sales to individuals over 18-years of age, there is currently no federal ban or restriction on DXM. Abuse of DXM, a readily available and typically inexpensive agent that is not detected on a standard urine drug screen, may be an under-recognized cause of substance-induced psychosis. It is imperative that clinicians are aware of the potential psychiatric sequelae of recreational DXM use.

Mixed-amphetamine salts expectancies among college students: Is stimulant induced cognitive enhancement a placebo effect?

INTRODUCTION: Non-medical use of prescription stimulants for cognitive enhancement in college students is increasing, despite evidence showing little benefit in non-clinical populations. The balanced placebo design (BPD) was used to independently evaluate the pharmacologic versus expectancy effects of mixed amphetamine salts on cognitive performance among a non-clinical sample of college-aged students. METHOD: Participants were screened and excluded for ADHD and other psychopathologies. A non-clinical sample (N=32) completed four two-hour laboratory sessions and were administered a neurocognitive battery in each session. Medication Assignment (10mg mixed-amphetamine salt (Adderall™) versus placebo) was crossed with Instructional Set (deception versus truth). A within-subjects design was used, such that all participants experienced each of the four conditions of the BPD during one of the four laboratory sessions. RESULTS: Participants performed no better than chance in identifying whether they received stimulant or placebo (Belief about Medication Assignment; 47% agreement; κ=-0.047, p=0.590). Participants showed improvement on only two of 31 subtests during active medication. Expecting and receiving stimulants was associated with improved cognitive performance. However, expecting placebo was associated with worse cognitive performance, regardless of the type of medication given. DISCUSSION: This study demonstrated that although non-medical use of stimulants does not enhance cognition, expectancies prominently influence cognitive performance. Participants who believed they received active medication both subjectively rated themselves as performing better and objectively performed better on a minority of subtests, independent of medication state.

Correcting delayed circadian phase with bright light therapy predicts improvement in ADHD symptoms: A pilot study.

Attention-deficit/hyperactivity disorder (ADHD) is a common condition with comorbid insomnia reported in >70% of children and adults. These patients demonstrate delays in sleep-wake rhythms, nocturnal rise in melatonin, and early morning rise in cortisol. Given that standard psychopharmacologic treatments for ADHD often do not completely control symptoms in participants with circadian rhythm delay, we sought to test whether bright light therapy (BLT) advances circadian rhythms and further reduces ADHD symptoms over standard treatments. In addition to standard of care, participants with ADHD diagnosis underwent 1 week of baseline assessment followed by 2-weeks of 30-min morning 10,000-lux BLT beginning 3 h after mid-sleep time. Participants minimized overhead light after 4 p.m., wore an actigraphy watch, and recorded BLT time on daily sleep logs. Dim Light Melatonin Onset (DLMO) was assessed at baseline and after 2-week treatment. ADHD symptoms were measured by the ADHD-Rating Scales (ADHD-RS). BLT significantly advanced the phase of DLMO by 31 min [mean time (SEM), 20:36 (0:21) advanced to 20:05 (0:20)] and mid-sleep time by 57 min [4:37 (0:22) advanced to 3:40 (0:16); paired t-tests, p = 0.002 and 0.004, respectively). Phase advances (in DLMO or mid-sleep time) were significantly correlated with decreased ADHD-RS total scores (p = 0.027 and 0.044) and Hyperactive-Impulsive sub-scores (p = 0.014 and 0.013, respectively). Actigraphy analysis for a subset of 8 participants with significant DLMO phase advance revealed no significant changes in total sleep time, sleep efficiency, wake after sleep onset, or percent wake during sleep interval. This is the first successful use of BLT for advancing melatonin phase and improving ADHD symptoms in adults. BLT may be a complementary treatment for both delayed sleep timing and ADHD symptoms in adults.

A Review of Psychopharmacological Interventions Post-Disaster to Prevent Psychiatric Sequelae.

BACKGROUND: Disasters are mega-scale catastrophic events which cause trauma and mental health sequelae. A review of early pharmacological interventions for the prevention of psychiatric disorders following disasters is sorely needed. METHODS: A literature search of "Psychiatric Sequelae AND Disasters", "Disaster mental health/Disaster psychiatry", "Psychotropics AND Disasters", and "Drug therapy AND Disasters" yielded 213 articles, 38 of which were included in the review. RESULTS: Common post-disaster psychiatric conditions are: posttraumatic stress disorder (PTSD), depressive and anxiety disorders, substance use disorders and medically-unexplained psychological symptoms. Early psychopharmacological interventions to prevent PTSD provide promising evidence for hydrocortisone in medically ill trauma populations. Less robust benefits were noted for other pharmacological interventions. No reported trials have explored prevention of depression or other common post-disaster psychiatric conditions. CONCLUSION: Hydrocortisone shows promise in preventing and reducing the psychiatric sequelae of PTSD following disasters. Further evaluation of hydrocortisone and other potentially beneficial psychopharmacological interventions are needed.

Reversible Encephalopathy due to Valproic Acid Induced Hyperammonemia in a Patient with Bipolar I Disorder: A Cautionary Report.

Valproic acid (VPA) is an FDA-approved medication widely prescribed for seizures, migraines, and mixed or manic episodes in bipolar disorder. Hyperammonemia is a rare complication of VPA use, which can result in high morbidity and occasionally fatal encephalopathy. The scant literature on Valproate Induced Hyperammonemic Encephalopathy (VIHE) is characterized by acute onset of decreasing level of consciousness, drowsiness, lethargy which in rare instances can lead to seizures, stupor, coma, and persistent morbidity and cortical damage. Below we describe a case report of a patient with Bipolar I Disorder with no primary evidence of hepatic dysfunction that was initiated on VPA and olanzapine to address manic and psychotic symptoms. This patient subsequently developed elevated ammonia (NH4) levels that led to a reversible encephalopathy. This cautionary case report highlights the potential for a rare but serious complication from VPA, a medication increasingly used in both neurologic and neuropsychiatric settings. It is imperative that clinicians perform a thorough physical, neurological and diagnostic evaluation, routinely check NH4 and VPA levels when prescribing these agents and exercise caution when VPA is concomitantly prescribed with antipsychotics and cytochrome P450 inducing antiepileptic medications.

Delayed sleep timing and symptoms in adults with attention-deficit/hyperactivity disorder: a controlled actigraphy study.

Patients with attention-deficit/hyperactivity disorder (ADHD) often exhibit disrupted sleep and circadian rhythms. Determination of whether sleep disturbance and/or circadian disruption are differentially associated with symptom severity is necessary to guide development of future treatment strategies. Therefore, we measured sleep and ADHD symptoms in participants aged 19-65 who met the DSM-IV-TR (Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision) criteria for ADHD and insomnia without psychiatric comorbidities by monitoring actigraphy and daily sleep logs for 2 wks, as well as the Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), the ADHD Rating Scale (ADHD-RS), and a clinic-designed sleep behavior questionnaire. Principal components analysis identified correlated circadian- and sleep-related variables in all participants with ADHD who completed the study (n = 24). The identified components were entered into a backwards stepwise linear regression analysis, which indicated that delayed sleep timing and increased sleepiness (ESS) (but not sleep duration or sleep efficiency) significantly predicted greater severity of both hyperactive-impulsive and inattentive ADHD symptoms (p < .05 for partial regression coefficients). In addition, combined subtypes had the most impaired age-adjusted sleep quality (PSQI scores; p < .05 compared with healthy controls; n = 13), and 91.7% of them reported going to bed late due to being "not tired/too keyed up to sleep" compared with 57.2% and 50% of inattentive and symptom-controlled participants, respectively (p < .05). In conclusion, the results of this study suggest that ADHD symptom severity correlates with delayed sleep timing and daytime sleepiness, suggesting that treatment interventions aimed at advancing circadian phase may improve daytime sleepiness. In addition, ADHD adults with combined hyperactive-impulsive and inattentive symptoms have decreased sleep quality as well as the delayed sleep timing of predominately inattentive subtypes.