Background: Photodynamic therapy (PDT) using topical application of aminolevulinic acid (ALA) is an effective treatment for acne vulgaris. However, there is no clear consensus on the treatment regime in Asians.<BR />
Aim: To determine the efficacy, safety and tolerability of 5% ALA PDT in the treatment of truncal acne in Asians.<BR />
Methods: Patients with truncal acne were treated with 5%-ALA under occlusion for 3 hours. All were subsequently treated with a red light source at wavelength 630 nm and an irradiance of 38mW/cm2 giving a total dose of 37 J/cm2. The numbers of acne lesions were recorded at baseline and regular intervals after treatment together with any adverse effects.<BR />
Results: Fifteen patients were recruited. Overall, there was a 64.2% reduction in the inflammatory lesions count and a 24.3% reduction in the non-inflammatory lesions count at the end of the 12 weeks follow-up. Both mean lesions counts were significantly lower than baseline at all follow-up time points with paired t tests (all P values <0.05). Pain was well tolerated among our patients.<BR />
Conclusion: A single treatment session of 5%-ALA PDT was effective for the treatment of truncal acne with little side effects and acceptable in our Asian patients.<BR /><BR /> <em>J Drugs Dermatol</em>. 2016;15(6):727-732.