narcolepsy
"I have narcolepsy and OSA along with severe Restless Legs Syndrome. I've been on Ritalin and 2 different non narcotic medicines and they simply stopped being effective after a short period of time. FINALLY my Doctor put me on 54mg of Concerta along with an 18 mg of Concerta, totaling 72mg and it's perfect. I can still take a short nap but I am able to finally stay awake longer then 2 hours. It took 3 sleep studies and about 5 different drugs but I think I finally am beginning to feel optimistic!"