This medication is a long-acting form of fluphenazine that is used to treat certain mental/mood problems (chronic schizophrenia). Fluphenazine decanoate, sold as Gencate Inj amongst others, is usually used in patients who have benefited from regular doses of short-acting forms of fluphenazine and who may benefit from long-term (maintenance) treatment with less frequent dosing. Fluphenazine belongs to a class of medications called phenothiazines and is also referred to as a neuroleptic. It works by affecting the balance of natural chemicals (neurotransmitters) in the brain.

Some of the benefits of continued use of this medication include reduced episodes of hallucinations, delusions, or bizarre behaviors that occur in patients with schizophrenia.