Efficacy of Individualized Homeopathic Medicines in Treatment of Acne Vulgaris: A Double-Blind, Randomized, Placebo-Controlled Trial.

Background: Acne is estimated to affect 9.4% of the global population, making it the 8^th most prevalent disease worldwide. Acne vulgaris (AV) is among the diseases that directly affect quality of life. This trial evaluated the efficacy of individualized homeopathic medicines (IHM) against placebo in AV.

Methods: In this double-blind, randomized, placebo-controlled trial conducted at the National Institute of Homoeopathy, India, 126 patients suffering from AV were randomized in a 1:1 ratio to receive either IHM (verum) in centesimal potencies or identical-looking placebo (control). The primary outcome measure was the Global Acne Grading System score; secondary outcomes were the Cardiff Acne Disability Index and Dermatology Life Quality Index questionnaires - all measured at baseline and 3 months after the intervention. Group differences and effect sizes (Cohen's d) were calculated on the intention-to-treat sample.

Results: Overall, improvements were greater in the IHM group than placebo, with small to medium effect sizes after 3 months of intervention; however, the inter-group differences were statistically non-significant. Sulphur (17.5%), Natrum muriaticum (15.1%), Calcarea phosphorica (14.3%), Pulsatilla nigricans (10.3%), and Antimonium crudum (7.1%) were the most frequently prescribed medicines; Pulsatilla nigricans, Tuberculinum bovinum and Natrum muriaticum were the most effective of those used. No harms, unintended effects, homeopathic aggravations or any serious adverse events were reported from either group.

Conclusion: There was non-significant direction of effect favoring homeopathy against placebo in the treatment of AV.

Trial registration: CTRI/2018/11/016248; UTN: U1111-1221-8164.