"i&#039;ve been taking this medication for several weeks now (effexor xr 37.5mg daily) and it has helped me a lot more than the celexa i was on. 

although recently (within the last 10 or so days) i have experienced very mild headaches that last a long time and feeling fatigued all day. caffeine doesn&#039;t help and extra sleep doesn&#039;t help. 

i&#039;ve had problems with fatigue all my life but this feels different. i am not sure if this is related to the medication because i have not had any side effects and i&#039;ve been on this medication for almost a month now."