Can prevacid cause nausea. A patient asks Dr. . Those who have taken Prevacid have sometimes experienced constipation or diarrhea as well as nausea. . That can make it . . damage of the lining of the esophagus that acid reflux disease can cause. Prevacid can also either . Consumer ratings reports for PREVACID . I was on prevacid for 5 months and it works for me but causes me to gain weight-10lbs . . A reader gives other People's Pharmacy readers cautionary advice about skipping doses of Effexo... more