Abstract
The intake of medications is a major aetiologic factor of xerostomia. The purpose of this study was to investigate the selective influence of medication categories on flow rates of individual major salivary glands. The effect of each medication category on salivary flow rates was determined by dichotomy comparisons between users and non-users. A total of 246 patients were included, 79 males and 167 females aged 13-92 years (mean 63 years). Of these, 200 used medications, which were grouped according to their category. A comprehensive medical and oral examination was performed. Both unstimulated and stimulated saliva was collected separately from the parotid and submandibular/sublingual glands. Parotid flow rate was decreased among users of tranquillisers and sedatives (unstimulated flow), cardiovascular drugs and gastrointestinal drugs (stimulated flow). Submandibular/sublingual unstimulated output was lower in patients taking cardiovascular drugs, antihistamines, tranquillisers/sedatives and antidepressants, while the stimulated flow, in those taking cardiovascular drugs, antihistamines, tranquillisers/sedatives and gastrointestinal drugs. Users of many common medication categories display significantly reduced unstimulated and/or stimulated salivary flow rate from the major salivary glands compared with non-users. A larger number of medication categories are associated with reductions in salivary flow rate from submandibular/sublingual glands than parotid glands.
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