Treatment Options for Xerostomia (Dry Mouth)

Assessment and Diagnosis

Baseline evaluation of salivary gland function should be performed by measuring whole salivary flows, as subjective feelings of dryness may not match objective measurements 1
Rule out non-Sjögren's related conditions such as candidiasis and burning mouth syndrome 2
Consider salivary scintigraphy for more detailed assessment of gland function 1

For patients with mild glandular dysfunction, non-pharmacological stimulation is the preferred first-line approach 2
Gustatory stimulants, such as sugar-free acidic candies, lozenges, and xylitol, can be used for non-pharmacological stimulation 1
Mechanical stimulants, such as sugar-free chewing gum, can also be used for non-pharmacological stimulation 1
The ideal preparation should have a neutral pH and contain fluoride and other electrolytes to mimic natural saliva 2
All non-pharmacological interventions provide some degree of subjective symptom relief, though evidence doesn't strongly favor one intervention over another 1
For patients with moderate glandular dysfunction, muscarinic agonists, such as pilocarpine, may be considered 2
Randomized controlled trials showed significant improvements in visual analogue scale dry mouth scores and salivary flow rates with muscarinic agonists 2
Cevimeline is another option with a potentially better tolerance profile, though it's not as widely licensed as pilocarpine 2
For patients with no salivary output, saliva substitution should be the preferred therapeutic approach 2
Saliva substitutes are commercially available and should mimic the composition of natural saliva 2

Amifostine (200 mg/m² IV) administered before radiation therapy has been shown to reduce both acute and chronic xerostomia in head and neck cancer patients 3, 4
Amifostine reduced grade 2 or higher acute xerostomia from 78% to 51% and chronic xerostomia from 57% to 34% at one year post-treatment 4
IMRT (Intensity-Modulated Radiation Therapy) significantly reduces xerostomia compared to conventional radiotherapy by sparing major salivary glands 5
Patients receiving IMRT had significantly lower rates of clinician-rated severe xerostomia (39.3% vs 82.1%) and higher salivary flow rates 5

A "bundle" of thirst interventions including sprays of cold sterile water, swabs of cold sterile water, and mouth/lip moisturizers can significantly decrease thirst intensity and distress 6
Frozen gauze pads with normal saline or ice have been shown to be more effective than wet gauze for thirst relief 6
Avoid lemon-glycerin swabs as they produce acidic pH, dry oral tissues, cause enamel erosion, and exhaust salivary mechanisms 6
For non-intubated patients on oxygen therapy, heated humidifiers are better than bubble humidifiers for reducing mouth and throat dryness 6
Family members can be involved in providing oral care for patients unable to self-administer treatments 6