"i take the extended release once a day. i recently got a dose increase for my extreme fatigue. it has been about 3 weeks and i do not like the symptoms that occur with it. i feel like a zombie, i don&#039;t enjoy talking when i am on my medicine, i get extremely bad frequent headaches, i am even more tired when it wears off but i am unable to sleep, i get really irritable and moody. with the lower dose the main problematic symptom i would have was the dry mouth, but that was manageable."