Duloxetine is a first-line agent for fibromyalgia and a second-line agent for treatment of osteoarthritis (OA) of the knee that has not responded to acetaminophen or non-steroidal anti-inflammatory drugs (NSAIDs). Duloxetine works by blocking neurotransmitters (serotonin and norepinephrine) that are involved in nerve pain. Stopping this medication requires monitoring by a healthcare provider as that may cause withdrawal side effects.
