THAMICA FEBRIYANTI, Physical Analysis and Antioxidant Activity of Lozenges from Extract of Water Lettuce (Pistia stratiotes). (Supervised by SABRI SUDIRMAN) The Water Lettuce plant (Pistia stratiotes) is one of the aquatic plants found in South Sumatra which can function as an anti-oxidant. The aim of this research was to determine the formula for apu-apu lozenges based on the physical characte…