The pain and nausea some people feel when they stop taking certain antidepressants is spurring controversy over whether these drugs should carry explicit warning labels about withdrawal.
Jame Tierney was 14 years old when she started taking Effexor, a serotonin norepinephrine reuptake inhibitor (SNRI), for her migraines. When she slowly tapered off the drug, Jame experienced vomiting, suicidal impulses, electric shock-like sensations and fatigue. She likened her confusion of time and space to special effects in the movie The Matrix.
Such withdrawal has often been mistaken for depression relapse. However, mounting testimony from people like Jame, who were prescribed SNRIs or selective serotonin reuptake inhibitors (SSRIs), such as Prozac or Zoloft, for nonpsychiatric conditions could publicize what doctors say is a phenomenon recognized since the late 1990s. Patients using Paxil and Effexor report the most severe problems because those drugs have the shortest half-lives, which make them the quickest to exit the system.
Some experts estimate 50 to 80 percent of patients experience withdrawal from Paxil when they go cold turkey, but this number is controversial. Jonathan Alpert, M.D., Ph.D., an assistant professor of psychiatry at Harvard University, says there are no definitive estimates, but believes that for patients who taper off the drugs, the number could be less than 5 percent. Even for patients who stop suddenly, scenarios like Jame's are rare, he adds.