Buspirone (Buspar) is a non-benzodiazepine, non-addictive treatment for GAD. Learn why it takes weeks to work, its side effects, and how it compares to SSRIs. Buspar (Buspirone) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. Buspirone is used to treat symptoms of anxiety. Experts are not sure exactly how buspirone works but think its anxiety-relieving effects may be due to its effects on serotonin and other neurotransmitter receptors such as dopamine. Buspirone belongs to the group of medicines known as anxiolytics. 2. Upsides. Buspirone, sold under the name Buspar among others, is an anxiolytic medication primarily used for the treatment of generalized anxiety disorder. Unlike benzodiazepines, buspirone does not produce significant sedation, dependence, or withdrawal symptoms. How Fast Does BuSpar Work for Anxiety? BuSpar or buspirone is a medication used to treat generalized anxiety disorder and typically takes about 2-4 weeks to take effect. BuSpar is the original brand name of buspirone, a psychiatric medication available by prescription only. It belongs to a class of medications called pre-synaptic serotonergic agonists and is primarily used to treat anxiety disorders. Buspirone (BuSpar) treats anxiety. It balances the levels of dopamine and serotonin hormones in your brain. BuSpar is an anti-anxiety medicine that affects chemicals in the brain that may be unbalanced in people with anxiety. BuSpar is used to treat anxiety disorders or the symptoms of anxiety, such as fear, tension, irritability, dizziness, pounding heartbeat, and other physical symptoms. Buspirone is used to treat certain anxiety disorders or to relieve the symptoms of anxiety. However, buspirone usually is not used for anxiety or tension caused by the stress of everyday life. It is not known exactly how buspirone works to relieve the symptoms of anxiety. Overview: Buspirone is used to reduce anxiety. Common side effects may include dizziness, nausea, headache, or lightheadedness. Serious side effects are less likely but may include movement.