I just started taking Effexor yesterday and woke up today with a horrible dry mouth. Will this go away? Also, has anyone experience diarrhea? I woke up with that too and it also said it's a side effect. I was on paxil for 9 years so I know all about side affects because there were a lot on paxil. Just wondering if Effexor has less side effects (as so the pharmacist told me). Thanks.