I have been taking 20mg Citalopram for almost 2 weeks now and the nausea is really bad. I can’t eat, can barely drink, I’m so dehydrated and have lost 4lbs. GP has told me to stop taking the Citalopram all together for 3 days then start with a new medication Sertraline 50mg on Monday. Is stopping suddenly then starting something else going to cause any problems? Aren’t the side effects similar for both these medications so likely to also make me feel sick?