"i had been on 20mg citalopram for the past 3months for ptsd and depression. recently have been increased to 40mg. i can&#039;t sleep at night, have a dry mouth/always thirsty and noticed the other night how tight i clench my jaw when trying to sleep. today i have a sick/knotted feeling in my tummy, eat to settle it despite not feeling any hunger but it doesn&#039;t help. dreams have always been ok. made a mistake of missing a few days and the nausea was horrendous will never forget to take it again. x"