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Home , Drooling

Diagnostic Tree Internal Medicine Peer Reviewed

Julie Allen, BVMS, MS, DACVIM (Small Animal) Ptyalism & Antech Diagnostics Pseudoptyalism

Drooling*

Ptyalism (excessive ** production) Pseudoptyalism (inability to swallow normal saliva production; drooling**)

History & examination • Complete physical examination, evaluating salivary gland size and symmetry • Full neurologic examination • Breed: Giant breeds (eg, St. Bernard) or Yorkshire and Maltese terriers (increased PSS incidence) • Age: Young animals likely to ingest toxins/FBs or have congenital issues; neoplasia likely in older animals • History of vaccination (eg, , calicivirus) or trauma (eg, electric cord injury) • Exposure to toxins, medications, topical products • Duration: Acute (eg, FB) vs chronic (eg, ) • Discoloration of saliva (eg, blood, purulent discharge) suggestive of oral problem • Halitosis may indicate oral, esophageal, or gastric disease • Pawing at face/ may indicate orofacial pain, hypocalcemia • Change in eating behavior: Dropping food, chewing on one side of the mouth, pseudoanorexia or hyporexia • Diet (eg, high-protein) can cause drooling because of precipitation of HE in patients with liver dysfunction • Other GI (ie, retching, regurgitation, vomiting, weight loss) or neurologic signs (ie, seizures, gagging, )

Known toxin Known medication exposure

Toxicity Medication reaction • Household cleaners • Medications/topical products given topically or PO • Plants/trees (eg, Kentucky coffee tree, poinsettia) (eg, selamectin, moxidectin–imidacloprid) • Insecticide/ (eg, boric acid, aldicarb) • Cholinergic drugs (eg, bethanechol), anticholinesterase • Rodenticide (eg, zinc phosphide) drugs (eg, pyridostigmine), cholinesterase inhibitors • Illicit drugs (eg, cocaine, amphetamines) (eg, OP) • Animal (eg, black widow spider, scorpion, • Pyrethrins/pyrethroids toads [Bufo spp], coral , sea hare [Aplysia spp]) • Ivermectin • Human sleep aids (eg, zolpidem) • Bitter drugs • Mushrooms (eg, Amanita muscaria) • Metaldehyde • Human tricyclic antidepressants (eg, ) • 5-hydroxytryptophan (ie, Griffonia seed extract) • Discontinue medication • Supportive care

• Depends on toxin exposure • Dilution if caustic agent * Rabies should always be considered in patients presenting with • Decontamination (eg, activated charcoal) drooling. • Supportive care • Specific antidote (if available) ** Distinction between ptyalism and pseudoptyalism is not absolute; oropharyngeal and CNS diseases can result in increased salivary production and inability to swallow. † HE management includes low-protein diet, enemas, oral antibiotics, lactulose, zinc supplementation, supportive care. AChR Ab = acetylcholine receptor antibody, FB = foreign body, FNA = fine-needle aspiration, HE = hepatic encephalopathy, OP = organophos- phates, PSS = portosystemic shunt, SCC = ,

T4 = thyroxine

12 cliniciansbrief.com • June 2014 • •  (eg, calicivirus, FeLV/FIV, caustic agent) • Depends on underlying disease • Immune-mediated disease (eg, ) • Dental cleaning/extractions Oral cavity abnormal • Tongue lesion (eg, linear FB), • Antiinflammatory/ (eg, uremia, caustic agent), tumor immunomodulatory therapy • Oropharyngeal disease (eg, tonsillar SCC) • Surgical resection/correction • fold abnormalities • Faucitis

Oral cavity normal

Neurologic, GI signs, or abnormal salivary glands? No other findings?

Physiologic Minimum database (CBC, chemistry panel, • Response to feeding T4, UA) • Hyperthermia • Excitement • Purring

Additional diagnostics based on findings No other findings • Bile acids (if HE suspected) • FeLV/FIV testing • AChR Ab test (if myasthenia gravis possible) • FNA/biopsy of lesions (mucocutaneous, oropharyngeal, lingual) Idiopathic or nonresponsive • FNA/biopsy of salivary glands • Radiography (oral cavity, neck, thorax, abdomen) • Abdominal ultrasonography • Portal scintigraphy • Fluoroscopic evaluation of swallowing •  or glycopyrrolate to decrease salivary flow • Preventive measures for moist dermatitis • Fluid support (if dehydrated) • Salivary gland removal

GI disease Neurologic disease Abnormal salivary glands

• Any disease resulting • Seizures • , necrotizing sialo- in nausea • Infectious disease (eg, metaplasia (ie, inflammation of • Esophageal disease rabies, pseudorabies, salivary glands) • Gastric dilatation– tetanus, botulism) • Sialadenosis–idiopathic non- volvulus • Myasthenia gravis inflammatory salivary gland • Gastric ulceration • Idiopathic trigeminal enlargement (may be form • Renal failure neuritis of limbic epilepsy) • Hepatic failure (HE; • Lesions of cranial nerves • Salivary gland neoplasia particularly in cats) IX, X, XII • Salivary mucocele

• Treat underlying disease • Anticonvulsants • Sialadenitis: If immune Diagnosis • Antiemetics, antacids • Other therapies, mediated, treat with for nausea depending on diagnosis Differential immunosuppressive dose of Diagnosis • HE management† corticosteroids ± phenobarbital • Sialadenosis: Phenobarbital, Investigation sclerotherapy • Mucocele/neoplasia: Surgical Treatment management Results

June 2014 • Clinician’s Brief 13