Wakix

WAKIX- pitolisant hydrochloride tablet, film coated
Harmony Biosciences, LLC

1 INDICATIONS AND USAGE

WAKIX is indicated for the treatment of excessive daytime sleepiness (EDS) in adult patients with narcolepsy [see Clinical Studies (14)].

2 DOSAGE AND ADMINISTRATION

2.1 Recommended Dosage

The recommended dosage range for WAKIX is 17.8 mg to 35.6 mg administered orally once daily in the morning upon wakening. Titrate dosage as follows:

Week 1: Initiate with a dosage of 8.9 mg (two 4.45 mg tablets) once daily

Week 2: Increase dosage to 17.8 mg (one 17.8 mg tablet) once daily

Week 3: May increase to the maximum recommended dosage of 35.6 mg (two 17.8 mg tablets) once daily

Dose may be adjusted based on tolerability.

If a dose is missed, patients should take the next dose the following day in the morning upon wakening.

It may take up to 8 weeks for some patients to achieve a clinical response.

2.2 Dosage Modification and Recommendations in Patients with Hepatic Impairment

In patients with moderate hepatic impairment, initiate WAKIX at 8.9 mg once daily and increase after 14 days to a maximum dosage of 17.8 mg once daily [see Warnings and Precautions (5.1), Use in Specific Populations (8.6), Clinical Pharmacology (12.3)].

WAKIX is contraindicated in patients with severe hepatic impairment. WAKIX has not been studied in patients with severe hepatic impairment [see Contraindications (4), Warnings and Precautions (5.1), Use in Specific Populations (8.6), Clinical Pharmacology (12.3)].

2.3 Dosage Modification and Recommendations in Patients with Renal Impairment and End-Stage Renal Disease

In patients with moderate and severe renal impairment, initiate WAKIX at 8.9 mg once daily and increase after 7 days to a maximum dosage of 17.8 mg once daily [see Warnings and Precautions (5.1), Use in Specific Populations (8.7), Clinical Pharmacology (12.3)].

WAKIX is not recommended in patients with end-stage renal disease (ESRD) [see Warnings and Precautions (5.1), Use in Specific Populations (8.7), Clinical Pharmacology (12.3)].

2.4 Dosage Recommendations for Concomitant Use with Strong CYP2D6 Inhibitors and Strong CYP3A4 Inducers

Coadministration with Strong CYP2D6 Inhibitors

For patients receiving strong CYP2D6 inhibitors, initiate WAKIX at 8.9 mg once daily and increase after 7 days to a maximum dosage of 17.8 mg once daily.

For patients on a stable dose of WAKIX, reduce the WAKIX dose by half upon initiating strong CYP2D6 inhibitors [see Drug Interactions (7.1), Clinical Pharmacology (12.3)].

Coadministration with Strong CYP3A4 Inducers

Concomitant use of WAKIX with strong CYP3A4 inducers decreases pitolisant exposure by 50%. Assess for loss of efficacy after initiation of a strong CYP3A4 inducer.

For patients stable on WAKIX 8.9 mg or 17.8 mg once daily, increase the dose of WAKIX to double the original daily dose (i.e., 17.8 mg or 35.6 mg, respectively) over 7 days.

If concomitant dosing of a strong CYP3A4 inducer is discontinued, decrease WAKIX dosage by half [see Drug Interactions (7.1), Clinical Pharmacology (12.3)].

2.5 Use in Patients Who Are Known CYP2D6 Poor Metabolizers (PMs)

In patients known to be poor CYP2D6 metabolizers, initiate WAKIX at 8.9 mg once daily and titrate to a maximum dose of 17.8 mg once daily after 7 days [see Use in Specific Populations (8.8), Clinical Pharmacology (12.5)].

3 DOSAGE FORMS AND STRENGTHS

  • WAKIX 4.45 mg tablets: white, round, biconvex film-coated tablet, marked with “S” on one side and plain on the other side. Each tablet contains 5 mg of pitolisant hydrochloride equivalent to 4.45 mg of pitolisant.
  • WAKIX 17.8 mg tablets: white, round, biconvex film-coated tablet, marked with “H” on one side and plain on the other side. Each tablet contains 20 mg of pitolisant hydrochloride equivalent to 17.8 mg of pitolisant.

4 CONTRAINDICATIONS

WAKIX is contraindicated in patients with severe hepatic impairment. WAKIX is extensively metabolized by the liver and there is a significant increase in WAKIX exposure in patients with moderate hepatic impairment [see Use in Specific Populations (8.6)].

5 WARNINGS AND PRECAUTIONS

5.1 QT Interval Prolongation

WAKIX prolongs the QT interval. The use of WAKIX should be avoided in patients with known QT prolongation or in combination with other drugs known to prolong the QT interval [see Drug Interactions (7.1)]. WAKIX should also be avoided in patients with a history of cardiac arrhythmias, as well as other circumstances that may increase the risk of the occurrence of torsade de pointes or sudden death, including symptomatic bradycardia, hypokalemia or hypomagnesemia, and the presence of congenital prolongation of the QT interval [see Clinical Pharmacology (12.2)]. The risk of QT prolongation may be greater in patients with hepatic or renal impairment due to higher concentrations of pitolisant. Monitor patients with hepatic or renal impairment for increased QTc. Dosage modification is recommended in patients with moderate hepatic impairment and moderate or severe renal impairment [see Dosage and Administration (2.2, 2.3)]. WAKIX is contraindicated in patients with severe hepatic impairment [see Contraindications (4)]. WAKIX is not recommended in patients with end-stage renal disease (ESRD) [see Dosage and Administration (2.3), Use in Specific Populations (8.7), Clinical Pharmacology (12.3)].

6 ADVERSE REACTIONS

The following adverse reactions are discussed in more detail in other sections of the labeling:

  • QT Interval Prolongation [see Warnings and Precautions (5.1)]

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 practice.

In the clinical trials for narcolepsy, 172 patients were treated with WAKIX in placebo-controlled trials for up to 8 weeks and in open-label extension trials for up to 5 years. In trials in which WAKIX was directly compared to placebo, 6 of the 152 patients (3.9%) who received WAKIX and 4 of the 114 patients (3.5%) who received placebo discontinued because of an adverse event.

Most Common Adverse Reactions

In the placebo-controlled clinical trials conducted in patients with narcolepsy with or without cataplexy, the most common adverse reactions (occurring in ≥5% of patients and at twice the rate of placebo) with the use of WAKIX were insomnia (6%), nausea (6%), and anxiety (5%).

Table 1 presents the adverse reactions that occurred at a rate of ≥2% in patients treated with WAKIX and more frequently than in patients treated with placebo in the placebo-controlled clinical trials in narcolepsy.

Table 1: Adverse Reactions that Occurred in ≥2% of WAKIX-Treated Patients and More Frequently than in Placebo-Treated Patients in Three Placebo-controlled Narcolepsy Studies

* The following terms were combined:

Abdominal pain includes: abdominal discomfort; abdominal pain; abdominal pain upper

Anxiety includes: anxiety; nervousness; stress; stress at work

Hallucinations includes: hallucination; hallucination visual; hypnagogic hallucination

Headache includes: cluster headache; headache; migraine; premenstrual headache; tension headache

Heart rate increased includes: heart rate increased; sinus tachycardia; tachycardia

Insomnia includes: initial insomnia; insomnia; middle insomnia; poor quality sleep

Musculoskeletal pain includes: arthralgia; back pain; carpal tunnel syndrome; limb discomfort; musculoskeletal pain; myalgia; neck pain; osteoarthritis; pain in extremity; sciatica

Rash includes: eczema; erythema migrans; rash; urticaria

Sleep disturbance includes: dyssomnia; sleep disorder; sleep paralysis; sleep talking

Upper respiratory infection includes: pharyngitis; rhinitis; sinusitis; upper respiratory tract infection; upper respiratory tract inflammation; viral upper respiratory tract infection

Adverse Reaction WAKIX (n=152) % Placebo (n=114) %
Headache* 18 15
Insomnia* 6 2
Nausea 6 3
Upper respiratory tract infection* 5 3
Musculoskeletal pain* 5 3
Anxiety* 5 1
Heart rate increased* 3 0
Hallucinations* 3 0
Irritability 3 2
Abdominal pain* 3 1
Sleep disturbance* 3 2
Decreased appetite 3 0
Cataplexy 2 1
Dry mouth 2 1
Rash* 2 1
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