Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

586 questions · 621 findings · 22 reviews · Oral medicine and oral cancer

No studies found 94 · 15.1%GRADE not reported 377 · 60.7%Very low 103 · 16.6%Low 35 · 5.6%Moderate 11 · 1.8%High 1 · 0.2%

Alpha‐lipoic acid vs placebo

Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

The review found no eligible studies for this question.

1 finding from 1 review

Dietary supplements (alpha lipoic acid +/- adjunctive ingredients) vs placebo

Adverse effects: intermittent facial skin rash · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether dietary supplements (alpha lipoic acid +/- adjunctive ingredients) changes adverse effects: intermittent facial skin rash compared with placebo (very low certainty).

1 finding from 1 review

Systemic beta carotene or carotenoids (incl. lycopene) vs placebo or no treatment

Malignant transformation (oral cancer development) · People with a diagnosis of oral leukoplakia

It is very uncertain whether systemic beta carotene or carotenoids (incl. lycopene) changes oral cancer development compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Amisulpride (antipsychotic, 50 mg/day) vs placebo

Relief of burning/discomfort (symptom relief; pain intensity) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms
1 finding from 1 review
  • Interventions for treating burning mouth syndrome 2016 · Cochrane All outcomes
    short-term (up to 3 months)
    Bogetto 1999 (amisulpride) included in the antidepressants/antipsychotics comparison but data not presented due to excessive attrition (19/24; 79%) in the placebo arm.
    1 study
    GRADE not reported

Gabapentin vs placebo

Change in taste · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

The review found no eligible studies for this question.

1 finding from 1 review

Herbal extracts (tea components; Chinese herbal mixture; freeze-dried black raspberry gel) vs placebo or no treatment

Malignant transformation (oral cancer development) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • SoF 4 (Herbal extracts vs placebo), Cancer development: SoF cell 'Not measured'. Effects text: cancer development was among the outcomes in Tsao 2009 (green tea extract) but it was not possible to analyse the data…
    1 study
    GRADE not reported

Bethanechol vs placebo

Change in feeling of dryness · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

The review found no eligible studies for this question.

1 finding from 1 review

Antidepressants (trazodone 200 mg/day) vs placebo

Relief of burning/discomfort (symptom relief; pain intensity) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether antidepressants (trazodone 200 mg/day) changes relief of burning/discomfort (symptom relief; pain intensity) compared with placebo (very low certainty).

1 finding from 1 review

Physical barriers (tongue protector) vs placebo

Adverse effects (narrative) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms
1 finding from 1 review
  • Interventions for treating burning mouth syndrome 2016 · Cochrane All outcomes
    short-term (up to 3 months)
    SoF7. Adverse effects: single study narratively reported that no adverse events occurred from the use of tongue protectors; 50 participants (1 RCT); low.
    1 study · 50 participants
    Low

Benzodiazepines (systemic clordemetildiazepam 1 mg/day) vs placebo

Relief of burning/discomfort (symptom relief; pain intensity) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms
1 finding from 1 review
  • Interventions for treating burning mouth syndrome 2016 · Cochrane All outcomes
    short-term (up to 3 months) · clordemetildiazepam
    Bogetto 1999 (clordemetildiazepam) included in the benzodiazepine comparison but data not presented (79% placebo-arm attrition).
    1 study
    GRADE not reported

Vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic acid, acitretin) vs placebo or no treatment

Improvement of histological features (not improved) · People with a diagnosis of oral leukoplakia

Vitamin A or retinoids (systemic or topical; incl. 13-cis-retinoic… probably leads to lower improvement of histological features (not improved) compared with placebo or no treatment (moderate certainty).

1 finding from 1 review

Systemic beta carotene or carotenoids (incl. lycopene) vs placebo or no treatment

Safety of the intervention (adverse effects) · People with a diagnosis of oral leukoplakia
1 finding from 1 review
  • Interventions for treating oral leukoplakia to prevent oral cancer 2016 · Cochrane All outcomes
    5 to 12 months
    SoF 2, Safety of the intervention at 5 to 12 months: 'Systemic beta carotene did not cause any adverse effects in 1 study supplementing 10 mg/d (Nagao), and caused adverse effects of varying severity in 9% of…
    3 studies
    GRADE not reported

Bethanechol vs placebo

QoL · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

The review found no eligible studies for this question.

1 finding from 1 review

Antidepressants (trazodone 200 mg/day) vs placebo

Abdominal pain · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether antidepressants (trazodone 200 mg/day) changes adverse effects: abdominal pains compared with placebo (very low certainty).

1 finding from 1 review

Dietary supplements (Catuama herbal compound) vs placebo

Relief of burning/discomfort (symptom relief; pain intensity) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms
1 finding from 1 review
  • Interventions for treating burning mouth syndrome 2016 · Cochrane All outcomes
    short-term (up to 3 months) · Catuama
    'Catuama' herbal compound (Spanemberg 2012) contributes to the dietary supplements short-term symptom-relief comparison (insufficient/contradictory); no separate estimate reported.
    1 study · 72 participants
    GRADE not reported

Physical barriers (tongue protector + reinforced self-control instruction) vs placebo

Relief of burning/discomfort (symptom relief; pain intensity) · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether physical barriers (tongue protector + reinforced self-control… changes relief of burning/discomfort (symptom relief; pain intensity) compared with placebo (very low certainty).

1 finding from 1 review

Antidepressants (trazodone 200 mg/day) vs placebo

Adverse effects: headache · People with primary burning mouth syndrome (BMS), that is, oral mucosal pain with no dental or medical cause for such symptoms

It is very uncertain whether antidepressants (trazodone 200 mg/day) changes adverse effects: headache compared with placebo (very low certainty).

1 finding from 1 review