Natural products for the management of xerostomia: a randomized, double-blinded, placebo-controlled clinical trial

Aim

The aim of this study was to evaluate the clinical performance of lycopene-enriched virgin olive oil in spray form used to treat patients with drug-induced xerostomia, comparing this with a placebo spray.

Materials and Methods

This double-blind, randomized clinical trial included elderly subjects with drug-induced xerostomia (n = 60). Resting salivary flow was measured using the draining technique. The Xerostomia Inventory (XI) was used to assess symptoms and the Oral Health Impact Profile 14 (OHIP-14) to assess patient quality of life. Evaluations were made before and after 12 weeks of product/placebo application.

Results

Sixty patients took part in the study. Symptoms improved among the treatment group (n = 30) after 12 weeks in the following XI domains: 'Rate the difficulty you experience in speaking because of dryness' (P = 0.03); 'Rate how much saliva is in your mouth' (P = 0.03); and 'Rate the dryness of your lips' (P = 0.04). The placebo group (n = 30) underwent improvements in: 'Rate how much saliva is in your mouth' (P = 0.02) and 'Rate the dryness of your mouth' (P = 0.01). A significant improvement (P = 0.001) in oral-related quality of life (OHIP-14) was identified in the treatment group, while no significant differences were observed in the placebo group (P > 0.05).

Conclusion

The topical application of lycopene-enriched virgin olive oil and its placebo counterpart improved xerostomia-related symptoms significantly (but not salivary flow rate) in patients with drug-induced xerostomia.

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