Causes of disorders of smell and taste include psychiatric disorders, nasal and sinus disease, poor dental hygiene, and intracranial disorders - Often occur concurrently in a patient - Medicinal products associated with disturbances of taste and smell o Chemotherapy products o Antihypertensive products o Hyperlipidemic products - Key terms and definitions: o Ageusia = absence of the sense of taste o Dysgeusia = perversion of the sense of taste; a bad taste in the mouth o Hypogeusia = a parageusia involving diminished sensitivity of taste o Anosmia = absence of the sense of smell o Hyposmia = a parosmia involving diminished sensitivity of smell o Parosmia = any disease or perversion of olfaction