Preparation method of furosemide freeze-dried powder injection
A technology of freeze-dried powder injection and furosemide, which is applied in the field of preparation of furosemide freeze-dried powder injection, can solve the problems of long sealed storage period, small loss of active ingredients, and inability to control the uniformity of furosemide, so as to reduce Effect of reconstitution time
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[0029] The invention provides a preparation method of furosemide freeze-dried powder injection, which comprises the following steps:
[0030] a) Mix furosemide, alkaline solution and first water for injection, adjust the pH value and mix with excipients to obtain mixed solution A;
[0031] b) Mixing the mixed solution A with the second water for injection, followed by filtering, freezing and drying to obtain furosemide lyophilized powder injection;
[0032] The mass ratio of the first water for injection to the second water for injection is 5: (4-6).
[0033] In the present invention, furosemide, alkaline solution and first water for injection are mixed, pH is adjusted and then mixed with excipients to obtain mixed solution A. The present invention first mixes furosemide, alkaline solution and first water for injection. In the present invention, the furosemide is the main drug. The source of the furosemide is not particularly limited in the present invention, and commercially availab...
Embodiment 1
[0052] To prepare 1,000 furosemide freeze-dried powder injections with a specification of 20 mg / bottle:
[0053] (1) First, add 20g furosemide and 10g sodium hydroxide solution with a mass concentration of 0.4% to 1000g water for injection, stir at 40°C to obtain a mixed solution of furosemide and sodium hydroxide; then use 1mol / The pH of L hydrochloric acid was adjusted to 9; then 80g of mannitol was added to stir the solvent; 1.5g of activated carbon was added and stirred for 15min, after which the titanium rod was decarbonized to obtain a mixed solution A.
[0054] (2) Mix the above-mentioned mixed solution A with 1000g of water for injection, then pass through 0.45μm microporous filter element and 0.22μm microporous filter element, then fill and semi-press stopper; then put the product in the freeze dryer, Frozen at -43°C for 1.5h, then controlled the heating rate to 7°C / h and heated to 35°C, then dried for 3h to obtain furosemide freeze-dried powder injection. Observe that th...
Embodiment 2
[0057] To prepare 1,000 furosemide freeze-dried powder injections with a specification of 20 mg / bottle:
[0058] (1) First, add 20g furosemide and 10g sodium hydroxide solution with a mass concentration of 0.4% to 1000g water for injection, stir at 40°C to obtain a mixed solution of furosemide and sodium hydroxide; then use 1mol / The pH of L hydrochloric acid was adjusted to 8.5; then 50g of mannitol was added to stir the solvent; 1.5g of activated carbon was added and stirred for 15min, after which the titanium rod was decarbonized to obtain a mixed solution A.
[0059] (2) Mix the above-mentioned mixed solution A with 1000g of water for injection, then pass through 0.45μm microporous filter element and 0.22μm microporous filter element, then fill and semi-press stopper; then put the product in the freeze dryer, Frozen at -40°C for 2h, then controlled the heating rate to 7°C / h and heated to 30°C, then dried for 5h to obtain furosemide freeze-dried powder injection. Observe that th...
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