Effexor Addiction: Side Effects, Detox, Withdrawal, and Treatment Table of Contents What is Effexor Addiction Effexor, also called venlafaxine, is a prescription drug used to treat depression and anxiety disorders. It helps balance brain chemicals like serotonin and norepinephrine. These chemicals affect mood, sleep, and focus. Doctors may prescribe Effexor for both short term and long-term use. But if someone suddenly stops, they … Continue reading Effexor Withdrawal Symptoms: What to Expect & Do