SPL Set ID: dc018b1d-72d3-45a2-84ff-cf9499c7ae97

Chemical name: 5-ethyldihydro-5-phenyl-4,6 (1H, 5H)-pyrimidinedione. Structural formula: Primidone is a white, crystalline, highly stable substance, M.P. 279-284°C. It is poorly soluble in water (60 mg per 100 mL at 37°C) and in most organic solvents. It possesses no acidic properties, in contrast to its barbiturate analog. Primidone Tablets, USP 50 mg and 250 mg contain the following inactive ingredients: lactose monohydrate, NF; magnesium stearate, NF; methyl cellulose, USP; microcrystalline cellulose, NF; purified water, USP; sodium lauryl sulfate, NF; sodium starch glycolate, NF; talc, USP 36e4a4a6-figure-01