Laura Ferris, MD, PhD
High-potency topical steroids such as clobetasol are commonly used as first-line treatment for psoriasis. A recent study ( Sidgiddi S et al. Dermatol Ther (Heidelb). 2021 Aug 28 ) compared the efficacy and safety of clobetasol 0.05% vs. 0.025% cream. Patients were randomized to receive either clobetasol 0.05% cream or one of two different formulations of clobetasol 0.025% cream twice a day for two weeks. PGA success rates (clear or almost clear skin) were higher with the 0.025% formulations (38.9% and 36.8%) than with the 0.05% cream (30.8%). Safety also appeared to be better or comparable with the 0.025% formulation as measured by the proportion of patients with an abnormal ACTH stimulation test (20.7% and 17.2% in the 0.025% group compared with 30.0% in the 0.05% group). Due to the small study size (88 subjects) these differences did not reach statistical significance, although they suggest that high efficacy and perhaps better safety (reduced hypothalamic–pituitary–adrenal axis suppression) can be achieved with lower concentration formulations of clobetasol cream.
The oral phosphodiesterase 4 inhibitor apremilast is FDA-approved to treat psoriasis and psoriatic arthritis and recent studies have shown that it is more effective than placebo in treating patients with mild-moderate psoriasis and scalp psoriasis. A recent prospective cohort study followed 45 adult patients with plaque and nail psoriasis with a fingernail Nail Psoriasis Severity Index (NAPSI) score of 12 or more treated with apremilast 30 mg twice daily for 52 weeks ( Muñoz-Santos C et al. J Dermatol. 2021 Aug 12 ). The primary endpoint, the percentage of patients with a Nail Assessment in Psoriasis and Psoriatic Arthritis-Patient Benefit Index of 2 or more at week 52, was achieved in 52% of patients. A median improvement of 53% in fingernail NAPSI score and a mean reduction in nail pain of 68% were observed at week 52. These findings show that apremilast can be useful in improving the quality-of-life impairment caused by nail psoriasis.
Traditional systemic therapies such as methotrexate and acitretin are cost-effective options for many psoriasis patients. The association of psoriasis with other comorbid conditions, particularly cardiovascular disease, has raised awareness of the importance of considering how therapies impact not just skin disease but also the risk posed by these psoriasis-associated comorbidities. A large Taiwanese retrospective cohort study compared patients treated with methotrexate (13,777) or acitretin (6,020) and found that in comparison to those treated with acitretin, patients treated with methotrexate were at lower risk of experiencing adverse cardiovascular outcomes, including ischemic heart disease and stroke, (adjusted hazard ratio [aHR], 0.84; 95% confidence interval [CI], 0.76-0.94) and had a lower risk of all-cause mortality (aHR, 0.75; 95% CI, 0.66-0.85).
Many disease and patient factors must be considered when choosing the right therapy for a patient. These studies provide valuable information to incorporate into this process and highlight the utility of topical and oral therapies for psoriasis.