Adjunct armodafinil improves wakefulness and memory in obstructive sleep apnea/hypopnea syndrome
by
Hirshkowitz M, Black JE, Wesnes K,
Niebler G, Arora S, Roth T. Michael E.
DeBakey VAMC Sleep Center,
Baylor College of Medicine,
Houston, TX 77030, USA.
Respir Med. 2006 Aug 11;

ABSTRACT

OBJECTIVE: Armodafinil is the R-enantiomer of racemic modafinil and has a significantly longer half-life than the S-enantiomer. This study evaluated armodafinil 150mg/day as an adjunct treatment for residual excessive sleepiness in patients with obstructive sleep apnea/hypopnea syndrome (OSA/HS) who were otherwise well controlled with nasal continuous positive airway pressure (nCPAP). We assessed the ability of armodafinil to improve wakefulness and cognition and reduce fatigue in this population. METHODS: In this 12-week, randomized, double-blind study, patients (n=259) received armodafinil (150mg) or placebo once daily. Efficacy assessments at baseline and weeks 4, 8, and 12 included the Maintenance of Wakefulness Test (MWT), Clinical Global Impression of Change (CGI-C), Cognitive Drug Research battery, Epworth Sleepiness Scale, and Brief Fatigue Inventory. RESULTS: At final visit, mean (sd) MWT sleep latency increased from baseline by 2.3 (7.8)min with armodafinil and decreased by 1.3 (7.1)min in the placebo group (P=0.0003). Armodafinil improved clinical condition (CGI-C, 71% vs. 53% for armodafinil and placebo, respectively; P=0.0069). Armodafinil significantly improved episodic secondary memory (P=0.0102) and patient-estimated wakefulness (P<0.01) and reduced fatigue (P<0.05) compared with placebo. Armodafinil did not adversely affect nCPAP use. The most common adverse event associated with armodafinil was headache. Sleep macroarchitecture was not altered by armodafinil. CONCLUSION: Adjunct treatment with armodafinil significantly improved alertness, overall clinical condition, and long-term memory. Armodafinil also reduced fatigue and the impact of sleepiness on daily activities in patients with OSA/HS who have residual excessive sleepiness notwithstanding regular use of nCPAP. Armodafinil was well tolerated.

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