I just started 30mg duloxetine generic brand for major depression and anxiety. I feel this drug helps however I get servere insomnia to the point I get no sleep at all, even with a benzodiazepine. Also it seems to really block up my bowels with constipation and even senna tablets or laxatives won't shift it. Do these side effects ease or should I stop taking it ?? What are people's thoughts on lexapro also?