Depression is a mental health condition that is known to cause millions of patients to suffer a wide variety of symptoms that are commonly associated with various types of depression. Prescription medications like Effexor XR are a serotonin-norepinephrine reuptake inhibitor that many mental health professionals and physicians prescribe to patients as a treatment option that can provide effective relief from several depression symptoms. It is an SNRI antidepressant that works by its ability in being able to restore a more natural balance to neurotransmitters in the brain such as norepinephrine and serotonin. This type of SNRI is a drug that has been known to cause various side effects with its use. Some of the most common side effects that some patients experience would include yawning, headache, increased sweating, drowsiness, problems with sleeping, dizziness, nervousness, nausea, tiredness, weakness, blurred vision, dry mouth, weight loss, constipation, and poor appetite.