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Título: Pitolisant, an inverse agonist of the histamine H3 receptor: an alternative stimulant for narcolepsy-cataplexy in teenagers with refractory sleepiness
Autor: INOCENTE, C. O.ARNULF, I.BASTUJI, H.THIBAULT-STOLL, A.RAOUX, A.REIMAO, R.LIN, J-SFRANCO, P.
Citación: JOURNAL OF SLEEP RESEARCH, v.21, suppl.1, Special Issue, p.317-317, 2012
Resumen: Objectives: Narcolepsy is a rare disabling sleep disorder characterized by excessive daytime sleepiness and cataplexy (sudden loss of muscle tone). Drugs such as pitolisant, which block histamine H3 autoreceptors, constitute a newly identified class of stimulants because they increase brain histamine and enhance wakefulness in animal and human adult narcolepsy. Methods: We report our experience with the off-label use of Pitolisant in four teenagers with narcolepsy/cataplexy with severe daytime sleepiness, refractory to available treatments (modafinil, methylphenidate, mazindol, sodium oxybate, and D-amphetamine). Results: All teenagers developed their disease during childhood (11.3–2.4 years; 50% boys) and were 17.3–0.8 years old at the time of pitolisant therapy. Pitolisant treatment was increased from 10 to 30 mg (n = 1) and 40 mg (n = 3). The adapted Epworth Sleepiness Score decreased from 14.3 T 1.1 to 9.5 to 2.9 (P = 0.03) with pitolisant alone to 7 T 3.4 when combined with mazindol (n = 1), methylphenidate (n = 1), or sodium oxybate plus modafinil (n = 1). Mean sleep onset latency increased from 31 T 14 to 36 to 8 min (P = 0.21) on the maintenance of wakefulness test. The severity and frequency of cataplexy were slightly improved. Adverse effects were minor (insomnia, headache, hot flushes, leg pain, and hallucinations) and transitory, except for insomnia, which persisted in two teenagers. The benefit was maintained after a mean of 13 months. Conclusions: Pitolisant could constitute an acceptable alternative for the treatment of refractory sleepiness in teenagers with narcolepsy.
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