I just started the generic verison of Effexor the yesterday. I was on cliropram, esclitopram, and pristiq in the past but had to switch since it was causing sexual dysfunction. I suffer from depression and anxiety. I started the generic Effexor yesterday at lunch and all was fine yesterday. This morning at work I was super shaky but when i ate food it helped. I took my pill at around 2pm, and it is now 5pm and my heart is racing. I have am overall healthy and have no problem with my heart before. Do I stick it out for a couple days to see if the side affects go down or go off of it? I do have some of my old pills that I could take till I can get into my doctor