Taking EFFEXOR XR can cause a potentially life-threatening problem called serotonin syndrome. The risk of developing serotonin syndrome is increased when EFFEXOR XR is taken with certain other medicines. Find patient medical information for Venlafaxine (Effexor) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Venlafaxine (Effexor) is a potent SNRI for major depression, GAD, and panic disorder. Learn about its blood pressure effects, discontinuation syndrome, and global pricing. This group aims to provide community-based support and advice for people who take Effexor (venlafexine). ⚠️ Please do not use this group as a replacement for professional medical advice ⚠️ Effexor XR (venlafaxine) is used to treat major depressive disorder, anxiety, and panic disorder. Includes Effexor XR side effects, interactions and indications. Effexor (Venlafaxine Hydrochloride) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Venlafaxine, sold under the brand name Effexor among others, is an antidepressant medication of the serotonin–norepinephrine reuptake inhibitor (SNRI) class. [5][9] It is used to treat major depressive disorder, generalized anxiety disorder, panic disorder, and social anxiety disorder. [9] What is Venlafaxine? Venlafaxine (brand name Effexor) is an antidepressant that belongs to a class called SNRIs (serotonin-norepinephrine reuptake inhibitors). It’s approved for treating depression and several anxiety disorders [7,9]. Effexor (venlafaxine) is an antidepressant that treats certain mental-health conditions. Common Effexor side effects include drowsiness, nausea, and constipation. They often resolve on their own over time. Other possible Effexor side effects include sweating, dry mouth, and anxiety. Venlafaxine is used to treat depression. It is also used to treat general anxiety disorder, social anxiety disorder, and panic disorder. Venlafaxine belongs to a group of medicines known as serotonin and norepinephrine reuptake inhibitors (SNRI).