Formulation of Transdermal Patch Nanoemulgel of Dadap Serep Leaves (Erythrina Subumbrans (Hassk.) Merr.) and Sand Ginger (Kaempferia Galanga L.) As Candidate Herbal Lactagogum Based on Usadha. JPS 2026, 9 (2), 1318-1327. https://doi.org/10.36490/journal-jps.com.v9i2.1510.