Patients who 40 mg celexa had at least two attacks should carry on with the treatment for at least 24 months. This information is not intended to replace the advice of a doctor. 4 you ve started zoloft and effexor antidepressants, stopping can be tough. They are not without side effects. Tricyclics may have the following side effects seizures, insomnia, anxiety, arrhythmia, hypertension, rash, 40 mg celexa, vomiting, abdominal cramps, weight loss, constipation, urinary retention, increased pressure on the eye, and sexual dysfunction.