Paroxetine is a prescription medication used to treat depression, panic disorder, and obsessive-compulsive disorder. Paroxetine belongs to a group of drugs called selective serotonin-reuptake inhibitors (SSRIs). It works by increasing the amount of serotonin in the brain, a natural substance that helps maintain mental balance and elevate mood.

This medication comes in tablet form, liquid form, and in an extended-release tablet. It is usually taken once daily, with or without food.

Common side effects of paroxetine include nausea, sleepiness, and weakness.