Optimasi Kadar Fenilbutazon dalam Pembawa Vesikular Etosom (Optimization of Concentration of Phenylbutazone in Ethosomes Vesicular Carrier) Nur Illiyyin Akib, Muhammad Handoyo Sahumena, Yunita Dawu, Vica Aspadiah, Indria Hafizah, Halimahtussaddiyah Ritonga MEDULA (JURNAL ILMIAH FAKULTAS KEDOKTERAN UNIVERSITAS HALU OLEO) Vol. 7 No. 2 2020 DOI 10.46496/medula.v7i2.11968