Long-term efficacy and safety of modafinil (PROVIGIL®) for the treatment of excessive daytime sleepiness associated with narcolepsy Long-term efficacy and safety of modafinil (PROVIGIL®) for the treatment of excessive daytime sleepiness associated with narcolepsy Download Valerian for insomnia: a systematic review of randomized clinical trials Article reviewed: A simplified method for monitoring respiratory impedance during continuous positive airway pressure