TASIMELTEON: 5,724 Adverse Event Reports & Safety Profile

HETLIOZ (contains tasimelteon) a melatonin receptor agonist, chemically designated as (1 R , 2 R )-N-[2-(2,3-dihydrobenzofuran-4-yl)cyclopropylmethyl]propanamide, containing two chiral centers. The molecular formula is C 15 H 19 NO 2 , and the molecular weight is 245.32. The structural formula is: Tasimelteon is a white to off-white crystalline powder. It is very slightly soluble in cyclohexane, slightly soluble in water and 0.1 N hydrochloric acid, and freely soluble or very soluble in methanol, 95% ethanol, acetonitrile, isopropanol, polyethylene glycol 300, propylene glycol and ethyl acetate. HETLIOZ capsules are intended for oral administration. Each capsule contains 20 mg of tasimelteon and the following inactive ingredients: colloidal silicon dioxide, croscarmellose sodium, lactose anhydrous, magnesium stearate, and microcrystalline cellulose. Each hard gelatin capsule consists of FD&C Blue #1, FD&C Red #3, and FD&C Yellow #6, gelatin, and titanium dioxide. HETLIOZ LQ oral suspension contains 4 mg of tasimelteon per mL of suspension and the following inactive ingredients: ascorbic acid, cherry flavor, mannitol, microcrystalline cellulose/carboxymethylcellulose sodium, polysorbate 80, sodium benzoate, sodium chloride, sucrose, sucralose, and water.

Chemical

Structure

AND USAGE HETLIOZ is a melatonin receptor agonist. HETLIOZ capsules are indicated for the treatment of: Non-24-Hour Sleep-Wake Disorder (Non-24) in adults ( 1 ) Nighttime sleep disturbances in Smith-Magenis Syndrome (SMS) in patients 16 years of age and older ( 1 ) HETLIOZ LQ oral suspension is indicated for the treatment of: Nighttime sleep disturbances in SMS in pediatric patients 3 years to 15 years of age ( 1 )

1.1 Non-24-Hour Sleep-Wake Disorder (Non-24) HETLIOZ capsules are indicated for the treatment of Non-24 in adults.

1.2 Nighttime Sleep Disturbances in Smith-Magenis Syndrome (SMS) HETLIOZ capsules are indicated for the treatment of nighttime sleep disturbances in SMS in patients 16 years of age and older. HETLIOZ LQ oral suspension is indicated for the treatment of nighttime sleep disturbances in SMS in pediatric patients 3 to 15 years of age.

AND ADMINISTRATION Indicated Population Dosage Form Body Weight Recommended Dosage Non-24 ( 2.2 )

Adults Capsules

Not applicable 20 mg one hour prior to bedtime Nighttime sleep disturbances in SMS ( 2.3 )

Patients

16 years of age and older Capsules Not applicable 20 mg one hour prior to bedtime Pediatric Patients 3 to 15 years of age Oral Suspension ≤ 28 kg 0.7 mg/kg one hour before bedtime ≥ 28 kg 20 mg one hour prior to bedtime HETLIOZ capsules and HETLIOZ LQ oral suspension are not substitutable ( 2.1 ) Administer at the same time every night ( 2.2 , 2.3 ) Take without food ( 2.4 )

2.1 Non-Interchangeability between HETLIOZ Capsules and HETLIOZ LQ Oral Suspension HETLIOZ capsules and HETLIOZ LQ oral suspension are not substitutable <span class="opacity-50 text-xs">[see Clinical Pharmacology ( 12.3 )]</span>.

2.2 Recommended Dosage for HETLIOZ Capsules for Non-24 Adults The recommended dosage of HETLIOZ capsules in adults is 20 mg one hour before bedtime, at the same time every night. Because of individual differences in circadian rhythms, drug effect may not occur for weeks or months.

2.3 Recommended Dosage for HETLIOZ Capsules and HETLIOZ LQ Oral Suspension for Nighttime Sleep Disturbances in SMS Patients 16 years of Age and Older The recommended dosage of HETLIOZ capsules in patients 16 years and older is 20 mg one hour before bedtime, at the same time every night.

Pediatric Patients

3 Years to 15 Years of Age The recommended dosage of HETLIOZ LQ oral suspension in pediatric patients 3 years to 15 years of age is based on body weight ( Table 1 ). Administer HETLIOZ one hour before bedtime, at the same time every night.

Table

1: Recommended Dosage of HETLIOZ LQ Oral Suspension for the Treatment of Nighttime Sleep Disturbances in SMS in Pediatric Patients 3 Years to 15 Years of Age Body Weight Daily Dose (oral suspension) ≤28 kg 0.7 mg/kg one hour before bedtime >28 kg 20 mg one hour before bedtime

2.4 Important Administration Information Administer HETLIOZ capsules and HETLIOZ LQ oral suspension without food <span class="opacity-50 text-xs">[see Clinical Pharmacology ( 12.3 )]</span> . If a patient is unable to take HETLIOZ at approximately the same time on a given night, they should skip that dose and take the next dose as scheduled.

Hetlioz Lq

Oral Suspension See " Instructions for Use " for complete administration instructions. Shake HETLIOZ LQ oral suspension well for at least 30 seconds before every administration. Remove seal and insert press-in bottle adapter (included in the package) into the neck of the bottle until a tight seal is made. Turn the bottle upside down and withdraw the prescribed amount of HETLIOZ LQ oral suspension from the bottle. Leave the press-in bottle adapter in place on bottle neck and replace cap on bottle. Store refrigerated. After opening, discard after 5 weeks (for the 48 mL bottle) and after 8 weeks (for the 158 mL bottle).

None. None ( 4 )

REACTIONS The most common adverse reactions (incidence >5% and at least twice as high on HETLIOZ than on placebo) were headache, increased alanine aminotransferase, nightmares or unusual dreams, and upper respiratory or urinary tract infection ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Vanda Pharmaceuticals Inc. at 1-844-438-5469 or www.hetlioz.com or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .

6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the 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 clinical practice. More than 2080 subjects have been treated with at least one dose of HETLIOZ, of which more than 380 have been treated for &gt; 26 weeks and more than 170 have been treated for &gt; 1 year. Non-24-Hour Sleep-Wake Disorder (Non-24) A 26-week, parallel-arm placebo-controlled study (Study 1) evaluated HETLIOZ (n=42) compared to placebo (n=42) in patients with Non-24. A randomized-withdrawal, placebo- controlled study of 8 weeks duration (Study 2) also evaluated HETLIOZ (n=10), compared to placebo (n=10), in patients with Non-24. In placebo-controlled studies, 6% of patients exposed to HETLIOZ discontinued treatment due to an adverse event, compared with 4% of patients who received placebo.

Table

2 shows the incidence of adverse reactions from Study 1. *Adverse reactions with an incidence > 5% and at least twice as high on HETLIOZ than on placebo are displayed.

Table

2: Adverse Reactions in Study 1 HETLIOZ N=42 Placebo N=42 Headache 17 % 7 % Alanine aminotransferase increased 10 % 5 % Nightmare/abnormal dreams 10 % 0 % Upper respiratory tract infection 7 % 0 % Urinary tract infection 7 % 2 % Nighttime Sleep Disturbances in Smith-Magenis Syndrome (SMS) A 9-week, double-blind, randomized, placebo-controlled, two-period crossover study evaluated HETLIOZ (capsules and oral suspension; n=25) compared to placebo (n=26) in the treatment of nighttime sleep disturbances in patients with Smith-Magenis Syndrome. Pediatric patients (n=11, age 3 to 15 years) received HETLIOZ LQ oral suspension, and patients ≥16 years of age (n=14) received HETLIOZ capsules. Adverse reactions were similar in patients treated for Non-24 and patients with Smith-Magenis syndrome treated for nighttime sleep disturbances. Adverse reactions were also similar in pediatric patients (3 years to 15 years) who received HETLIOZ LQ oral suspension, and patients ≥16 years of age who received HETLIOZ capsules.

AND PRECAUTIONS May cause somnolence: After taking tasimelteon capsules, patients should limit their activity to preparing for going to bed, because tasimelteon capsules can impair the performance of activities requiring complete mental alertness ( 5.1 )

5.1 Somnolence After taking tasimelteon capsules, patients should limit their activity to preparing for going to bed. Tasimelteon capsules can potentially impair the performance of activities requiring complete mental alertness.

INTERACTIONS Strong CYP1A2 inhibitors (e.g., fluvoxamine): Avoid use of tasimelteon in combination with strong CYP1A2 inhibitors because of increased exposure ( 7.1 , 12.3 ) Strong CYP3A4 inducers (e.g., rifampin): Avoid use of tasimelteon in combination with rifampin or other CYP3A4 inducers, because of decreased exposure ( 7.2 , 12.3 )

7.1 Strong CYP1A2 Inhibitors (e.g., fluvoxamine) Avoid use of tasimelteon in combination with fluvoxamine or other strong CYP1A2 inhibitors because of a potentially large increase in tasimelteon exposure and greater risk of adverse reactions <span class="opacity-50 text-xs">[see Clinical Pharmacology ( 12.3 )]</span> .

7.2 Strong CYP3A4 Inducers (e.g., rifampin) Avoid use of tasimelteon in combination with rifampin or other CYP3A4 inducers because of a potentially large decrease in tasimelteon exposure with reduced efficacy <span class="opacity-50 text-xs">[see Clinical Pharmacology ( 12.3 )]</span> .

7.3 Beta-Adrenergic Receptor Antagonists (e.g., acebutolol, metoprolol) Beta-adrenergic receptor antagonists have been shown to reduce the production of melatonin via specific inhibition of beta-1 adrenergic receptors. Nighttime administration of beta- adrenergic receptor antagonists may reduce the efficacy of tasimelteon.