Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. For this medicine, the following should be considered: Allergies This is a decision you and your doctor will make. In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This product is available in the following dosage forms: This medicine is available only with your doctor's prescription. These medicines are thought to work by increasing the activity of chemicals called serotonin and norepinephrine in the brain. Duloxetine is also used to treat fibromyalgia (muscle pain and stiffness) and chronic (long-lasting) pain that is related to muscles and bones.ĭuloxetine belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SSNRIs).