The vast majority of medications do not damage the salivary glands, but the
likelihood of decreased salivary flow rates increases inthe presence of numerous diseases and medications.Although patients receiving multiple xerostomic
medications tend to have more severe dry-mouth symptoms, the effects of xerostomic medications on patients can be highly variable.Some medications,
such as those prescribed for overactive bladder disease,irritable bowel syndrome and Parkinson disease, are used specifically for their anticholinergic properties.
These medications directly inhibit salivary flow and often are associated with dry-mouth symptoms.