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Antisialagogues are drugs or substances that decrease the flow rate of saliva and their effect is opposite to that of sialagogues. [1] Their origin may be both natural and synthetic. Anticholinergics generally have antisialagogue effects, and most produce some level of sedation, both being advantageous in surgical procedures. [2]
It has also been defined as increased amount of saliva in the mouth, which may also be caused by decreased clearance of saliva. [ 4 ] Hypersalivation can contribute to drooling if there is an inability to keep the mouth closed or difficulty in swallowing (dysphagia) the excess saliva, which can lead to excessive spitting.
Sialometery can yield measures of stimulated salivary flow or unstimulated salivary flow. Stimulated salivary flow rate is calculated using a stimulant such as 10% citric acid dropped onto the tongue, and collection of all the saliva that flows from one of the parotid papillae over five or ten minutes. Unstimulated whole saliva flow rate more ...
Adverse effects, especially with higher doses, include dizziness, drowsiness, fatigue, diarrhea, unusual dreams, trouble sleeping, depression, and vision problems such as blurred vision or dry eyes. [21] β-blockers, including metoprolol, reduce salivary flow via inhibition of the direct sympathetic innervation of the salivary glands.
Artificial saliva also contributes to oral health maintenance by promoting enamel defence against acidic erosion. In individuals with a high intake of soft drinks or a high vomiting frequency and a decrease in saliva flow, artificial saliva can help improve the clearance time of acids and reduce the chance of dental erosion.
Scopolamine, also known as hyoscine, [9] or Devil's Breath, [10] is a natural or synthetically produced tropane alkaloid and anticholinergic drug that is used as a medication to treat motion sickness [11] and postoperative nausea and vomiting. [12] [1] It is also sometimes used before surgery to decrease saliva. [1]
2. Use of xerostomic medications – these medications will result in a decreased salivary flow rate which can predispose to infections of glands. Examples of medications that may contribute to this include antihistamines, antidepressants, and anticholinergic agents. 3.
[60] [55] In a stimulated saliva flow test the person sucks on a sugar-free sweet, whilst collecting saliva. An unstimulated salivary flow rate of 0.1 to 0.2 ml/min and a stimulated flow rate of 0.7 ml/min or less is considered to be abnormally low flow rates indicative of salivary gland hypofunction. [61] Unstimulated saliva production reduces ...