Flavix Capsule is used to treat Major Depressive Disorder, Generalised Anxiety Disorder, Social Anxiety Disorder, and Panic Disorder. It contains Venlafaxine, which works by increasing the levels of mood-enhancing chemicals called serotonin and noradrenaline in the brain. It may cause side effects such as nausea, sweating and hot flushes, headaches, dry mouth, dizziness, and constipation. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.