Should I stop taking concerta for my A.D.D.

[Yulima]

I've been taking 36 mg of concerta for a couple months. I don't take it everyday. I take it on the days I will need it. I hadn't taken it in two weeks since last time when I was coming off the meds I got very sad and cried for five hours about my future. I took it today and felt okay. Until I started coming down. I got the chills and began sweating which isn't totally unusual. But then i became so unmotivated I couldn't leave my room. I began thinking about how I've accomplished so little and questioning why I was put on this earth. And then I began to feel unreal and detached from my body. I cried nonstop for three hours because I felt like an alien and that I didn't belong on earth. I just felt like I wasn't from here. This is extremely unusual for me. Then I began thinking back to see if this has ever happened before and realized it's only happened on two occasions...while coming off of concerta. The obvious answer would be stop taking it, but it really does help with my focus before it begins to wear off. I'm just stuck because it works very well for me until it wears off

[Sandman2]

   It may well be that you are over dosed.  One way to tell, besides the side effects you are feeling is that Concerta should last for about 8 hours.  If it is lasting much longer - then pretty good sign that you are taking too much.
   You definitely need to talk to your doctor and let him/her know what is going on!    And since you are taking it on an as needed basis, you might want to look into the standard Ritalin which only lasts 4 hours max and comes in many more dose sizes.     Also, people tend to get used to their meds if they are on it daily.   You, obviously, don't have that opportunity.  Might be another good reason to discuss a smaller dose with your doc.
    Hope this helps.  
       Oh, are you on any other meds?