hypersomnia
"Diagnosis of Idyopathic Hyposomnia about 15 months ago, prescribed Modafinil 4 tbs a day. Over time lasting power decreased dramatically.  3weeks ago was prescribed Armodafinil. Side effects are quite debilitating, Dizziness,  nausea,  and and a big increase in migraine headaches. The overwhelming sleepiness is bad, impacting on daily life. Finding Armodafinil is only lasting about 6 hours so definitely no night driving. I can really feel the come down as it wears off. Disappointed as I was really hoping for some improvement in life quality."