In addition to Paxil®, there are several other selective serotonin reuptake inhibitors (SSRIs) on the market today. Celexa® (citalopram), Lexapro® (escitalopram), Effexor® (venlafaxine), and Zoloft® (sertraline) are available by prescription in the United States. These drugs, which are prescribed to treat the symptoms of depression and anxiety, can cause a host of unpleasant and potentially dangerous side effects. Most noteworthy are the reports of increased suicidal thoughts experienced by patients when they start treatment with SSRIs. Psychiatrists who prescribe Celexa®, Lexapro®, Effexor®, and Zoloft® should monitor how individual patients react to these powerful drugs.