Sunosi Drug Information
Generic name: SOLRIAMFETOL
Dopamine and Norepinephrine Reuptake Inhibitor [EPC]
Uses of Sunosi
is indicated to improve wakefulness in adult patients with excessive daytime sleepiness associated with narcolepsy or obstructive sleep apnea (OSA) . Limitations of Use SUNOSI is not indicated to treat the underlying airway obstruction in OSA. Ensure that the underlying airway obstruction is treated (e.g., with continuous positive airway pressure (CPAP)) for at least one month prior to initiating SUNOSI for excessive daytime sleepiness. Modalities to treat the underlying airway obstruction should be continued during treatment with SUNOSI. SUNOSI is not a substitute for these modalities. SUNOSI is a dopamine and norepinephrine reuptake inhibitor (DNRI) indicated to improve wakefulness in adult patients with excessive daytime sleepiness associated with narcolepsy or obstructive sleep apnea (OSA). Limitations of Use SUNOSI is not indicated to treat the underlying airway obstruction in OSA. Ensure that the underlying airway obstruction is treated (e.g., with continuous positive airway pressure (CPAP)) for at least one month prior to initiating SUNOSI for excessive daytime sleepiness.
Modalities to treat the underlying airway obstruction should be continued during treatment with SUNOSI. SUNOSI is not a substitute for these modalities.
Dosage & Administration of Sunosi
Important Considerations
Prior to Initiating Treatment Prior to initiating treatment with SUNOSI, ensure blood pressure is adequately controlled .
General
Administration Instructions Administer SUNOSI orally upon awakening with or without food. Avoid taking SUNOSI within 9 hours of planned bedtime because of the potential to interfere with sleep if taken too late in the day. SUNOSI 75 mg tablets are functionally scored tablets that can be split in half (37.5 mg) at the score line.
Dosage in Narcolepsy Initiate
SUNOSI at 75 mg once daily in adults with narcolepsy. The recommended dose range for SUNOSI is 75 mg to 150 mg once daily. Based on efficacy and tolerability, the dosage of SUNOSI may be doubled at intervals of at least 3 days.
The maximum recommended dose is 150 mg once daily. Dosages above 150 mg daily do not confer increased effectiveness sufficient to outweigh dose-related adverse reactions .
Dosage in
OSA Initiate SUNOSI at 37.5 mg once daily in adults with OSA. The recommended dosage range for SUNOSI is 37.5 mg to 150 mg once daily. Based on efficacy and tolerability, the dosage of SUNOSI may be doubled at intervals of at least 3 days. The maximum recommended dosage is 150 mg once daily.
Dosages above 150 mg daily do not confer increased effectiveness sufficient to outweigh dose-related adverse reactions .
Dosage Recommendations in Patients with Renal Impairment Moderate renal impairment (eGFR 30-59
mL/min/1.73 m 2 ) : Initiate dosing at 37.5 mg once daily. Based on efficacy and tolerability, dose may be increased to a maximum of 75 mg once daily after at least 7 days . Severe renal impairment (eGFR 15-29 mL/min/1.73 m 2 ) : Administer 37.5 mg once daily. The maximum recommended daily dose is 37.5 mg . End Stage Renal Disease (eGFR <15 mL/min/1.73 m 2 ) : SUNOSI is not recommended for use in patients with ESRD .
Side Effects of Sunosi
Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The safety of SUNOSI has been evaluated in 930 patients (ages 18 to 75 years) with narcolepsy or OSA. Among these patients, 396 were treated with SUNOSI in the 12-week placebo-controlled trials at doses of 37.5 mg (OSA only), 75 mg, and 150 mg once daily. Information provided below is based on the pooled 12-week placebo-controlled studies in patients with narcolepsy or OSA. Most Common Adverse Reactions The most common adverse reactions (incidence ≥ 5% and greater than placebo) reported more frequently with the use of SUNOSI than placebo in either the narcolepsy or OSA populations were headache, nausea, decreased appetite, anxiety, and insomnia.
Table 1 presents the adverse reactions that occurred at a rate of ≥ 2% and more frequently in SUNOSI-treated patients than in placebo-treated patients in the narcolepsy population. Table 1: Adverse Reactions ≥ 2% in Patients Treated with SUNOSI and Greater than Placebo in Pooled 12-Week Placebo-Controlled Clinical Trials in Narcolepsy (75 mg and 150 mg) * “Insomnia” includes insomnia, initial insomnia, middle insomnia, and terminal insomnia. “Anxiety” includes anxiety, nervousness, and panic attack. “Headache” includes headache, tension headache, and head discomfort. “Nausea” includes nausea and vomiting. Narcolepsy System Organ Class Placebo N = 108 (%) SUNOSI N = 161 (%) Metabolism and Nutrition Disorders Decreased appetite 1 9 Psychiatric Disorders Insomnia* Anxiety* 4 1 5 6 Nervous System Disorders Headache* 7 16 Cardiac Disorders Palpitations 1 2 Gastrointestinal Disorders Nausea* Dry mouth Constipation 4 2 1 7 4 3 Table 2 presents the adverse reactions that occurred at a rate of ≥ 2% and more frequently in SUNOSI-treated patients than in placebo-treated patients in the OSA population.
Table 2: Adverse Reactions ≥ 2% in Patients Treated with SUNOSI and Greater than Placebo in Pooled 12-Week Placebo-Controlled Clinical Trials in OSA (37.5 mg, 75 mg, and 150 mg) * “Anxiety” includes anxiety, nervousness, and panic attack. “Nausea” includes nausea and vomiting. “Abdominal pain” includes abdominal pain, abdominal pain upper, and abdominal discomfort. OSA System Organ Class Placebo N = 118 (%) SUNOSI N = 235 (%) Metabolism and Nutrition Disorders Decreased appetite 1 6 Psychiatric Disorders Anxiety* Irritability 1 0 4 3 Nervous System Disorders Dizziness 1 2 Cardiac Disorders Palpitations 0 3 Gastrointestinal Disorders Nausea* Diarrhea Abdominal pain* Dry mouth 6 1 2 2 8 4 3 3 General Disorders and Administration Site Conditions Feeling jittery Chest discomfort 0 0 3 2 Skin and Subcutaneous Tissue Disorders Hyperhidrosis 0 2 Other Adverse Reactions Observed During the Premarketing Evaluation of SUNOSI Other adverse reactions of < 2% incidence but greater than placebo are shown below. The following list does not include adverse reactions: 1) already listed in previous tables or elsewhere in the labeling, 2) for which a drug cause was remote, 3) which were so general as to be uninformative, or 4) which were not considered to have clinically significant implications.
Narcolepsy population: Psychiatric disorders : agitation, bruxism, irritability Respiratory, thoracic and mediastinal disorders : cough Skin and subcutaneous tissue disorders : hyperhidrosis General disorders and administration site conditions : feeling jittery, thirst, chest discomfort, chest pain Investigations : weight decreased OSA population: Psychiatric disorders : bruxism, restlessness Nervous system disorders : disturbance in attention, tremor Respiratory, thoracic and mediastinal disorders : cough, dyspnea Gastrointestinal disorders : constipation, vomiting Investigations : weight decreased Dose-Dependent Adverse Reactions In the 12-week placebo-controlled clinical trials that compared doses of 37.5 mg, 75 mg, and 150 mg daily of SUNOSI to placebo, the following adverse reactions were dose-related: headache, nausea, decreased appetite, anxiety, diarrhea, and dry mouth ( Table 3 ). Table 3: Dose-Dependent Adverse Reactions ≥ 2% in Patients Treated with SUNOSI and Greater than Placebo in Pooled 12-Week Placebo-Controlled Clinical Trials in Narcolepsy and OSA * In OSA only. ** “Headache” includes headache, tension headache, and head discomfort. “Nausea” includes nausea and vomiting. Placebo N = 226 (%) SUNOSI 37.5 mg N = 58* (%) SUNOSI 75 mg N = 120 (%) SUNOSI 150 mg N = 218 (%) Headache** 8 7 9 13 Nausea** 5 7 5 9 Decreased appetite 1 2 7 8 Anxiety 1 2 3 7 Dry mouth 2 2 3 4 Diarrhea 2 2 4 5 Adverse Reactions Resulting in Discontinuation of Treatment In the 12-week placebo-controlled clinical trials, 11 of the 396 patients (3%) who received SUNOSI discontinued because of an adverse reaction compared to 1 of the 226 patients (< 1%) who received placebo. The adverse reactions resulting in discontinuation that occurred in more than one SUNOSI-treated patient and at a higher rate than placebo were: anxiety (2/396; < 1%), palpitations (2/396; < 1%), and restlessness (2/396; < 1%). Increases in Blood Pressure and Heart Rate SUNOSI’s effects on blood pressure and heart rate are summarized below.
Table 4 shows maximum mean changes in blood pressure and heart rate recorded at sessions where the Maintenance of Wakefulness Test (MWT) was administered . Table 5 summarizes 24-hour ambulatory blood pressure monitoring (ABPM) and ambulatory heart rate monitoring performed in the outpatient setting. Table 4: Maximal Mean Changes in Blood Pressure and Heart Rate Assessed at MWT Sessions from Baseline through Week 12: Mean (95% CI)* SBP = systolic blood pressure; DBP = diastolic blood pressure; HR = heart rate * For study weeks 1, 4, and 12, SBP, DBP, and HR were assessed pre-dose and every 1-2 hours for 10 hours after test drug administration. For all time points at all visits, the mean change from baseline was calculated, by indication and dose, for all patients with a valid assessment.
The table shows, by indication and dose, the mean changes from baseline for the week and time point with the maximal change in SBP, DBP, and HR. ** The maximum recommended daily dose is 150 mg. Dosages above 150 mg daily do not confer increased effectiveness sufficient to outweigh dose-related adverse reactions. Placebo SUNOSI 37.5 mg SUNOSI 75 mg SUNOSI 150 mg SUNOSI 300 mg ** Narcolepsy STUDY 1 n 52 - 51 49 53 SBP 3.5 3.1 4.9 6.8 n 23 - 47 49 53 DBP 1.8 (-1.8, 5.5) 2.2 4.2 4.2 n 48 - 26 49 53 HR 2.3 (-0.1, 4.7) 3.7 4.9
OSA
STUDY 2 n 35 17 54 103 35 SBP 1.7 (-1.4, 4.9) 4.6 (-1.1, 10.2) 3.8 2.4 4.5 n 99 17 17 107 91 DBP 1.4 (-0.1, 2.9) 1.9 (-2.3, 6.0) 3.2 (-0.9, 7.3) 1.8 3.3 n 106 17 51 102 91 HR 1.7 1.9 (-1.9, 5.7) 3.3 2.9
Table 5: Blood Pressure and Heart Rate by 24-hour Ambulatory Monitoring: Mean
Change (95% CI) from Baseline at Week 8 SBP = systolic blood pressure; DBP = diastolic blood pressure; HR = heart rate * Number of patients who had at least 50% valid ABPM readings. ** The maximum recommended daily dose is 150 mg. Dosages above 150 mg daily do not confer increased effectiveness sufficient to outweigh dose-related adverse reactions. Placebo SUNOSI 37.5 mg SUNOSI 75 mg SUNOSI 150 mg SUNOSI 300 mg ** Narcolepsy STUDY 1 n* 46 44 44 40 SBP -0.4 (-3.1, 2.4) - 1.6 (-0.4, 3.5) -0.5 (-2.1, 1.1)
DBP -0.2 (-1.9, 1.6) - 1.0 (-0.4, 2.5) 0.8 (-0.4, 2.0) 3.0
HR 0.0 (-1.9, 2.0) - 0.2 (-2.1, 2.4) 1.0 (-1.2, 3.2)
OSA
STUDY 2 n* 92 43 49 96 84 SBP -0.2 (-1.8, 1.4) 1.8 (-1.1, 4.6) 2.6 -0.2 (-2.0, 1.6) 2.8 (-0.1, 5.8) DBP 0.2 (-0.9, 1.3) 1.4 (-0.4, 3.2) 1.5 (-0.04, 3.1) -0.1 (-1.1, 1.0)
Postmarketing Experience
The following adverse reactions have been reported during post-approval use of SUNOSI. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure: Immune system disorders : Hypersensitivity (rash erythematous, rash, and urticaria).
Warnings & Cautions for Sunosi
Blood Pressure and Heart Rate Increases
SUNOSI increases systolic blood pressure, diastolic blood pressure, and heart rate in a dose-dependent fashion . Epidemiological data show that chronic elevations in blood pressure increase the risk of major adverse cardiovascular events (MACE), including stroke, heart attack, and cardiovascular death. The magnitude of the increase in absolute risk is dependent on the increase in blood pressure and the underlying risk of MACE in the population being treated. Many patients with narcolepsy and OSA have multiple risk factors for MACE, including hypertension, diabetes, hyperlipidemia, and high body mass index (BMI). Assess blood pressure and control hypertension before initiating treatment with SUNOSI. Monitor blood pressure regularly during treatment and treat new-onset hypertension and exacerbations of pre-existing hypertension.
Exercise caution when treating patients at higher risk of MACE, particularly patients with known cardiovascular and cerebrovascular disease, pre-existing hypertension, and patients with advanced age. Use caution with other drugs that increase blood pressure and heart rate . Periodically reassess the need for continued treatment with SUNOSI. If a patient experiences increases in blood pressure or heart rate that cannot be managed with dose reduction of SUNOSI or other appropriate medical intervention, consider discontinuation of SUNOSI. Patients with moderate or severe renal impairment may be at a higher risk of increases in blood pressure and heart rate because of the prolonged half-life of SUNOSI .
Psychiatric Symptoms Psychiatric adverse reactions have been observed in clinical trials with
SUNOSI, including anxiety, insomnia, and irritability . SUNOSI has not been evaluated in patients with psychosis or bipolar disorders. Exercise caution when treating patients with SUNOSI who have a history of psychosis or bipolar disorders. Patients with moderate or severe renal impairment may be at a higher risk of psychiatric symptoms because of the prolonged half-life of SUNOSI . Patients treated with SUNOSI should be observed for the possible emergence or exacerbation of psychiatric symptoms.
If psychiatric symptoms develop in association with the administration of SUNOSI, consider dose reduction or discontinuation of SUNOSI.
Drug Interactions with Sunosi
Monoamine Oxidase (MAO) Inhibitors Do not administer
SUNOSI concomitantly with MAOIs or within 14 days after discontinuing MAOI treatment. Concomitant use of MAO inhibitors and noradrenergic drugs may increase the risk of a hypertensive reaction. Potential outcomes include death, stroke, myocardial infarction, aortic dissection, ophthalmological complications, eclampsia, pulmonary edema, and renal failure.
Drugs that Increase Blood Pressure and/or Heart Rate
Concomitant use of SUNOSI with other drugs that increase blood pressure and/or heart rate has not been evaluated, and such combinations should be used with caution.
Dopaminergic Drugs Dopaminergic drugs that increase levels of dopamine or that bind
directly to dopamine receptors might result in pharmacodynamic interactions with SUNOSI. Interactions with dopaminergic drugs have not been evaluated with SUNOSI. Use caution when concomitantly administering dopaminergic drugs with SUNOSI.
Pregnancy Safety for Sunosi
Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to SUNOSI during pregnancy. Healthcare providers are encouraged to register pregnant patients, or pregnant women may enroll themselves in the registry by calling 1-877-283-6220 or contacting the company at www.SunosiPregnancyRegistry.com. Risk Summary Available data from case reports are not sufficient to determine drug-associated risks of major birth defects, miscarriage, or adverse maternal or fetal outcomes.
In animal reproductive studies, oral administration of solriamfetol during organogenesis caused maternal and fetal toxicities in rats and rabbits at doses ≥ 4 and 5 times and was teratogenic at doses 19 and ≥ 5 times, respectively, the maximum recommended human dose (MRHD) of 150 mg based on mg/m 2 body surface area. Oral administration of solriamfetol to pregnant rats during pregnancy and lactation at doses ≥ 7 times the MRHD based on mg/m 2 body surface area resulted in maternal toxicity and adverse effects on fertility, growth, and development in offspring (see Data ). The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes.
In the U.S. general population, the estimated background risks of major birth defects and miscarriage in clinically recognized pregnancies are 2% to 4% and 15% to 20%, respectively. Data Animal Data Solriamfetol was administered orally to pregnant rats during the period of organogenesis at 15, 67, and 295 mg/kg/day, which are approximately 1, 4, and 19 times the MRHD based on mg/m 2 body surface area. Solriamfetol at ≥ 4 times the MRHD caused maternal toxicity that included hyperactivity, significant decreases in body weight, weight gain, and food consumption.
Fetal toxicity at these maternally toxic doses included increased incidence of early resorption and post-implantation loss, and decreased fetal weight. Solriamfetol was teratogenic at 19 times the MRHD; it increased the incidence of fetal malformations that included severe sternebrae mal-alignment, hindlimb rotation, bent limb bones, and situs inversus. This dose was also maternally toxic.
The no-adverse-effect level for malformation is 4 times and for maternal and embryofetal toxicity is approximately 1 times the MRHD based on mg/m 2 body surface area. Solriamfetol was administered orally to pregnant rabbits during the period of organogenesis at 17, 38, and 76 mg/kg/day, which are approximately 2, 5, and 10 times the MRHD based on mg/m 2 body surface area. Solriamfetol at 10 times the MRHD caused maternal toxicity of body weight loss and decreased food consumption.
Solriamfetol was teratogenic at ≥ 5 times the MRHD, it caused fetal skeletal malformation (slight-to-moderate sternebrae mal-alignment) and decreased fetal weight. The no-adverse-effect level for malformation and fetal toxicity is approximately 2 times and for maternal toxicity is approximately 5 times the MRHD based on mg/m 2 body surface area. Solriamfetol was administered orally to pregnant rats during the period of organogenesis from gestation day 7 through lactation day 20 post-partum, at 35, 110, and 350 mg/kg/day, which are approximately 2, 7, and 22 times the MRHD based on mg/m 2 body surface area.
At ≥ 7 times the MRHD, solriamfetol caused maternal toxicity that included decreased body weight gain, decreased food consumption, and hyperpnea. At these maternally toxic doses, fetal toxicity included increased incidence of stillbirth, postnatal pup mortality, and decreased pup weight. Developmental toxicity in offspring after lactation day 20 included decreased body weight, decreased weight gain, and delayed sexual maturation.
Mating and fertility of offspring were decreased at maternal doses 22 times the MRHD without affecting learning and memory. The no-adverse-effect level for maternal and developmental toxicity is approximately 2 times the MRHD based on mg/m 2 body surface area.
Pediatric Use of Sunosi
Pediatric Use Safety and effectiveness in pediatric patients have not been established. Clinical studies of SUNOSI in pediatric patients have not been conducted.
Contraindications for Sunosi
is contraindicated in patients receiving concomitant treatment with monoamine oxidase (MAO) inhibitors, or within 14 days following discontinuation of monoamine oxidase inhibitor, because of the risk of hypertensive reaction . Concurrent treatment with a monoamine oxidase inhibitor (MAOI) or use of an MAOI within the preceding 14 days.
Overdosage Information for Sunosi
A specific reversal agent for SUNOSI is not available. Hemodialysis removed approximately 21% of a 75 mg dose in end stage renal disease patients. Overdoses should be managed with primarily supportive care, including cardiovascular monitoring.
Consult with a Certified Poison Control Center at 1-800-222-1222 for latest recommendations.
Clinical Studies of Sunosi
Narcolepsy
The efficacy of SUNOSI in improving wakefulness and reducing excessive daytime sleepiness was demonstrated in a 12-week, multi-center, randomized, double-blind, placebo-controlled, parallel-group study (Study 1; NCT02348593 ) in adult patients with a diagnosis of narcolepsy according to the ICSD-3 or DSM-5 criteria. Wakefulness and sleepiness were assessed using the Maintenance of Wakefulness Test (MWT) and the Epworth Sleepiness Scale (ESS). The MWT measures an individual’s ability to remain awake during the daytime in a darkened, quiet environment. Patients were instructed to remain awake for as long as possible during 40-minute test sessions, and sleep latency was determined as the mean number of minutes patients could remain awake in the first four test sessions.
The ESS is an 8-item questionnaire by which patients rate their perceived likelihood of falling asleep during usual daily life activities. Change in overall symptom severity was assessed using the Patient Global Impression of Change (PGIc) scale. The PGIc is a 7-point patient-reported scale by which patients rate their symptom change since the beginning of the study.
Responses range from “very much improved” to “very much worse.” The co-primary efficacy endpoints were change from baseline in MWT and ESS at Week 12. A pre-specified secondary endpoint was percentage of subjects reported as improved (minimally, much, or very much) at Week 12 by PGIc. A total of 239 patients with narcolepsy were randomized to receive SUNOSI 75 mg, 150 mg, or 300 mg (two times the maximum recommended daily dose), or placebo once daily. Patients randomized to the 150-mg dose received 75 mg for the first 3 days before increasing to 150 mg.
Demographic and baseline disease characteristics were similar for the SUNOSI and placebo groups. Median age was 34 years (range 18 to 70 years), 65% were female, 80% were Caucasian, 14% were African American, and 3% were Asian. Approximately 51% of patients had cataplexy.
Compared to the placebo group, patients randomized to 150 mg SUNOSI showed statistically significant improvements on the MWT (treatment effect difference: 7.7 minutes, Table 6 ) and on the ESS (treatment effect difference: 3.8 points, Table 7 ) at Week 12. These effects were apparent at Week 1 and consistent with the results at Week 12. The change on percentage of subjects reported as improved by PGIc was also statistically significant compared with placebo. There were trends toward improvement in the SUNOSI 75-mg treatment group ( Tables 6 and 7 ); however, these changes were not statistically significant. There was no evidence of differential efficacy in patients with cataplexy and patients without cataplexy.
Examination of subgroups by age, race, and sex did not suggest differences in response. At Week 12, 150 mg of SUNOSI demonstrated improvements in wakefulness compared to placebo as assessed in test sessions 1 (approximately 1 hour post-dose) through 5 (approximately 9 hours post-dose) of the MWT ( Figure 2 ). Nighttime sleep as measured with polysomnography was not affected by the use of SUNOSI in Study 1. Figure 2: Maintenance of Wakefulness Test Improvements in Test Sessions 1 through 5 in Patients with Narcolepsy in Study 1 at Week 12 Figure 2
Obstructive Sleep Apnea (OSA)
The efficacy of SUNOSI in improving wakefulness and reducing excessive daytime sleepiness in patients with OSA was demonstrated in a 12-week multi-center, randomized, double-blind, placebo-controlled study (Study 2; NCT02348606 ) in adults diagnosed with OSA according to ICSD-3 criteria. The co-primary efficacy endpoints were change from baseline in MWT and ESS at Week 12; a pre-specified secondary endpoint was percentage of subjects reported as improved (minimally, much, or very much) at Week 12 by PGIc. A total of 476 patients with OSA were randomized to receive SUNOSI 37.5 mg, 75 mg, 150 mg, or 300 mg (two times the maximum recommended daily dose), or placebo once daily.
Patients randomized to the 150-mg dose received 75 mg for the first 3 days before increasing to 150 mg. Demographic and baseline disease characteristics were similar for the SUNOSI and placebo groups. Median age was 55 years (range 20 to 75 years), 37% were female, 76% were Caucasian, 19% were African American, and 4% were Asian.
Compared to the placebo group, patients randomized to 37.5 mg, 75 mg, and 150 mg SUNOSI showed statistically significant improvements on the MWT (treatment effect difference: 4.5 minutes, 8.9 minutes, and 10.7 minutes respectively; Table 6 ) and ESS (treatment effect difference: 1.9 points, 1.7 points, and 4.5 points respectively; Table 7 ) at Week 12. These effects were apparent at Week 1 and consistent with the results at Week 12. The change on percentage of subjects reported as improved by PGIc was also statistically significant compared with placebo at the 75 mg and 150 mg doses. Examination of subgroups by age, race, and sex did not suggest differences in response. At Week 12, 37.5 mg, 75 mg, and 150 mg of SUNOSI all demonstrated improvements in wakefulness compared to placebo as assessed in test sessions 1 (approximately 1 hour post-dose) through 5 (approximately 9 hours post-dose) of the MWT ( Figure 3 ). Nighttime sleep as measured with polysomnography was not affected by the use of SUNOSI in Study 2. Patients’ compliance with a primary OSA therapy device was similar across the placebo and SUNOSI treatment groups at baseline, and did not change during the 12-week study period in any treatment group.
Figure 3: Maintenance of Wakefulness Test Improvements in Test Sessions 1 through 5 in Patients with OSA in Study 2 at Week 12 Table 6: Efficacy Results for Maintenance of Wakefulness Test (minutes) in Patients with Narcolepsy (Study 1) and OSA (Study 2) SD = standard deviation; SE = standard error; LS Mean = least square mean; CI = confidence interval Maximum possible MWT score is 40 minutes. A positive change represents improvement. Difference from Placebo = LS Mean Difference between change from baseline between active drug and placebo. * Dose that was statistically significantly superior to placebo after adjusting for multiplicity.
Indication/ Study Treatment Group (N) Baseline Mean (SD) LS Mean Change from Baseline at Week 12 (SE) Difference from Placebo (95% CI) Narcolepsy STUDY 1 Placebo 6.2 2.1 - SUNOSI 75 mg 7.5 4.7 2.6 (-1.0, 6.3) SUNOSI 150 mg* 7.9 9.8
OSA
STUDY 2 Placebo 12.6 0.2 - SUNOSI 37.5 mg* 13.6 4.7
SUNOSI 75 mg* 12.4 9.1 8.9
SUNOSI 150 mg* 12.5 11.0
Table 7: Efficacy Results for Epworth Sleepiness Scale in Patients with Narcolepsy
(Study 1) and OSA (Study 2) SD = standard deviation; SE = standard error; LS Mean = least square mean; CI = confidence interval Scores range from 0 to 24 with higher scores indicating more severe sleepiness. A negative change represents improvement. Difference from placebo = LS mean difference between change from baseline between SUNOSI and placebo. * Dose that was statistically significantly superior to placebo after adjusting for multiplicity.
Indication/ Study Treatment Groups (N) Baseline Score Mean (SD) LS Mean Change from Baseline at Week 12 (SE) Difference from Placebo (95% CI) Narcolepsy STUDY 1 Placebo 17.3 -1.6 - SUNOSI 75 mg 17.3 -3.8 -2.2 (-4.0, -0.3) SUNOSI 150 mg* 17.0 -5.4 -3.8 (-5.6, -2.0) OSA STUDY 2 Placebo 15.6 -3.3 - SUNOSI 37.5 mg* 15.1 -5.1 -1.9 (-3.4, -0.3) SUNOSI 75 mg* 15.0 -5.0 -1.7 (-3.2, -0.2) SUNOSI 150 mg* 15.1 -7.7 -4.5 (-5.7, -3.2) Figure 3
Maintenance of Efficacy in Narcolepsy and
OSA The maintenance of effect of SUNOSI in improving wakefulness and reducing excessive daytime sleepiness in patients with narcolepsy and OSA was assessed in two randomized-withdrawal, placebo-controlled studies, Study 3 ( NCT02348619 ) and Study 4 ( NCT02348632 ).) and Study 4 (NCT02348632). Study 3 was a 6-week, multi-center, double-blind, placebo-controlled, randomized-withdrawal study in 174 adult patients with a diagnosis of OSA. The co-primary efficacy endpoints were change from the beginning to the end of the randomized withdrawal period in MWT and ESS. During a 2-week, open-label titration phase, patients were started on SUNOSI 75 mg once daily, and were titrated to the maximum tolerable dose between 75 mg and 300 mg per day (two times the maximum recommended daily dose). Patients were continued on this dose for a 2-week stable-dose phase. At the end of the stable-dose phase, 124 patients who reported “much” or “very much” improvement on the PGIc and who showed improvements on the MWT and ESS entered a double-blind withdrawal phase and were randomized 1:1 to either continue SUNOSI at the dose received in the stable-dose phase or switch to placebo. Compared to patients who remained on SUNOSI, patients randomized to placebo experienced statistically significant worsening of sleepiness as measured by the MWT and ESS ( Table 8 ). Study 4 was a 52-week, open-label study in 638 patients with either narcolepsy or OSA who had completed a prior trial.
During a 2-week, open-label titration phase, patients were started on SUNOSI 75 mg once daily, and were titrated to the maximum tolerable dose between 75 mg and 300 mg per day (two times the maximum recommended daily dose). Patients remained on this dose during a subsequent open-label treatment period of either 38 (for patients previously enrolled in Study 1 or Study 2) or 50 (all others) weeks. A 2-week randomized-withdrawal period was incorporated into the study. After 6 months of stable-dose treatment, 282 patients (79 with narcolepsy; 203 with OSA) entered the randomized-withdrawal period.
Patients were randomized 1:1 to either continue to receive SUNOSI at the dose received in the maintenance phase or to switch to placebo. The primary efficacy endpoint was change from the beginning to the end of the randomized-withdrawal period in ESS. Compared to patients who remained on SUNOSI, patients randomized to placebo experienced statistically significant worsening of sleepiness as measured by the ESS ( Table 8 ). Table 8: Efficacy Results from Randomized Withdrawal Studies in Patients with Narcolepsy and OSA in Studies 3 and 4 SD = standard deviation; SE = standard error; LS Mean = least square mean; CI = confidence interval For MWT, maximum possible score is 40 minutes; negative changes indicate worsening. For ESS, scores range from 0 to 24; positive changes indicate worsening. * Statistically significantly superior to placebo after adjusting for multiplicity.
Indication/ Study Endpoint Treatment Groups (N) Beginning of Randomized Withdrawal Period (Baseline) Mean (SD) LS Mean Change from Baseline (SE) Difference from Placebo (95% CI) OSA STUDY 3 MWT (minutes) Placebo 29.0 -
SUNOSI* 31.7 -1.0 11.2
ESS Score Placebo 5.9
SUNOSI* 6.4 -0.1 -4.6 (-6.4, -2.8)
OSA and Narcolepsy STUDY 4 ESS Score Placebo 7.8
Drug information sourced from the FDA. This content is for informational purposes only and does not constitute medical advice. Consult a healthcare professional before making any medication decisions.
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