The invention relates to a decumbent
corydalis tuber
eye drop and a preparation method thereof. According to the decumbent
corydalis tuber
eye drop, the pH value is 4.6 to 6.5, and the
permeation pressure is between 0.24 and 0.360 smol / kg; each 1,000 milliliters of decumbent
corydalis tuber
eye drop is prepared from the following substances: a decumbent corydalis tuber extract containing 0.32 to 0.43
gram of
protopine, 0.0036 to 0.0048 mol of diluted
phosphoric acid solution, and 0.1 to 3.0 grams of
sodium dihydrogen
phosphate, 3 to 8 grams of solubilizer, 0.2 to 0.8
gram of disodium edentate, 0.1 to 0.8
gram of
bacteriostatic agent, 0 to 2.0 grams of
thickening agent, 0 to 4 grams of medicinal
ethanol solution of freshener,
disodium hydrogen phosphate and
glycerol which serve as auxiliary materials and the balance of water for injection, wherein the concentration of the diluted
phosphoric acid solution is less than or equal to 0.5 mol / L, and a
mass ratio of the freshener to medicinalethanol is 1:(1-15); the amount of the
disodium hydrogen phosphate is used for regulating the pH value of the decumbent corydalis tuber eye drop; and the amount of the
glycerol is used for regulatingthe
permeation pressure of the decumbent corydalis tuber eye drop. The decumbent corydalis tuber eye drop has a mild effect, and the compliance of patients is improved greatly, so the decumbent corydalis tuber eye drop is an eye drop which is small in
irritation and high in stability.