NCT07049068

Comparison of Nicotinamide Treatments for Actinic Keratosis

Double-bllind, Double-dummy, Randomized Clinical Trial Comparative Between Oral Nicotinamide Versus Topical Nicotinamide in the Management of Facial Actinic Keratosis .

• Status: Completed
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 74 (actual)
• Sponsor: Federal University of Rio Grande do Sul · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

In this study, the investigators aimed to evaluate the effect of oral nicotinamide compared to topical nicotinamide in the presence of actinic keratoses on the face. The reason that led the investigators to study this subject is that previous studies have shown possible favorable effects of nicotinamide, both topical and oral, in the prevention of precursor lesions of skin cancer. However, there are no studies to date comparing topical and oral presentations of nicotinamide in the prevention of the appearance of actinic keratoses and in the regression of the number of actinic keratoses. In this randomized clinical trial, 74 participants with actinic keratoses on the face received either oral nicotinamide and topical placebo or topical nicotinamide and oral placebo for 6 months.

Detailed description

Background: Nicotinamide has been reported to be effective in reducing rates of actinic keratosis, however, to date, there are no studies comparing their topical and oral presentations Objectives: to compare efficacy of oral and topical nicotinamide in preventing and reducing the number of facial actinic keratosis. Secundary objectives: to evaluate the occurrence of non-melanoma skin cancer (NMSC) and evaluate the safety and adverse effect profile of topical and oral nicotinamide. Methods: In this randomized, double-blind, double-dummy clinical trial, 74 participants with actinic keratosis on the face received either oral nicotinamide and topical placebo or topical nicotinamide and oral placebo for 6 months.

Conditions

• Actinic Keratoses

Interventions

Type	Name	Description
DRUG	Oral Nicotinamide	Participants from group 1 received 120 capsules of 500 mg nicotinamide and a tube of placebo cream at each visit. . All participants were instructed to take 1 capsule every 12 hours and to apply the cream to their entire face twice a day. Participants were unaware of which group they were allocated to and participants in both groups received either capsules (active or placebo, which looked identical) or a tube of cream (active or placebo, which looked identical). In follow-up visits participants returned empty tubes to the responsible pharmacist. At the initial assessment and at 6 months photographs of the participants' faces were taken.
DRUG	topical nicotinamide	Participants from group 2 received a tube of 5% nicotinamide cream and 120 placebo capsules. All participants were instructed to take 1 capsule every 12 hours and to apply the cream to their entire face twice a day. Participants were unaware of which group they were allocated to and participants in both groups received either capsules (active or placebo, which looked identical) or a tube of cream (active or placebo, which looked identical). In follow-up visits participants returned empty tubes to the responsible pharmacist. At the initial assessment and at 6 months photographs of the participants' faces were taken.

Timeline

• Start date: 2022-02-01
• Primary completion: 2024-11-30
• Completion: 2024-11-30
• First posted: 2025-07-03
• Last updated: 2025-09-15

Locations

1 site across 1 country: Brazil