Primoplex Acetate (primo tabs) 25 mg is an oral medication used to treat bipolar disorder. It belongs to a class of medications called atypical antipsychotics, which work by changing the behavior of certain brain chemicals. This medication can help improve symptoms such as feelings of sadness, irritability, feeling “high,” and reckless behavior. It can also help with sleep problems and overall mood stability. Primoplex Acetate (primo tabs) comes in tablets of 25 mg and is taken orally, usually once daily with food. This medication is available in a pack of 30 tablets.