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Sir: It has been identified but is not well-known or appreciated by practitioners that selective serotonin reuptake inhibitors (SSRIs) can cause excessive yawning as a side effect.

SSRIs are the treatment of choice for depression. The list of approved indications for these drugs has expanded to include obsessive- compulsive disorder, social anxiety disorder, generalized anxiety disorder, premenstrual dysphoric disorder, and eating disorders.