I am having a hard time just taking a walk. I am 62. Before I started taking Latuda I was swimming 30 laps 2x's a week. Now I feel like its too much trouble because I am so tired. I have bipolar/manic depression and was diagnosed in 2005. I am also taking 300mg Luvox.Why do I feel tired taking 40 mg of Latuda. It has been 3 weeks that I've been taking this amount.