Freeze-dried ropivacaine hydrochloride composition for injection
A technology of ropivacaine hydrochloride and its composition, which is applied in the field of medicine and can solve the problems of ropivacaine hydrochloride preparation instability, poor stability, light and heat resistance, etc.
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Embodiment 1
[0094] Embodiment 1: Preparation of ropivacaine hydrochloride freeze-dried powder injection
[0095] formula:
[0096] Ropivacaine hydrochloride 75mg,
[0097] Lactose 40mg,
[0098] Acid-base regulator: appropriate amount, adjust the pH to the specified value in the following preparation method,
[0099] Water for injection: add to 3ml.
[0100] Preparation method:
[0101] (a) take by weighing ropivacaine hydrochloride, lactose of prescription quantity, add prescription quantity 60% water for injection, stir and make to dissolve;
[0102] (b) Add activated carbon (0.1% by volume of the medicinal liquid) to the medicinal liquid obtained in the previous step, adjust the pH value of the solution to 3.2 with an acid-base regulator, stir for 2.0 hours at a temperature of 25° C., filter for decarbonization, and use an acid-base regulator to The regulator adjusts the pH of the solution to 5.0;
[0103] (c) Add water for injection to the full amount of the prescription, ...
Embodiment 2
[0106] Embodiment 2: Preparation of ropivacaine hydrochloride freeze-dried powder injection
[0107] formula:
[0108] Ropivacaine hydrochloride 75mg,
[0109] Lactose 45mg,
[0110] Acid-base regulator: appropriate amount, adjust the pH to the specified value in the following preparation method,
[0111] Water for injection: add to 3.75ml.
[0112] Preparation method:
[0113] (a) take by weighing ropivacaine hydrochloride, lactose of prescription quantity, add prescription quantity 65% water for injection, stir and make to dissolve;
[0114] (b) Add activated carbon (0.05% by volume of the medicinal solution) to the medicinal solution obtained in the previous step, adjust the pH value of the solution to 3.0 with an acid-base regulator, stir for 2.0 hours at a temperature of 20°C, filter for decarbonization, and use an acid-base regulator to The regulator adjusts the pH of the solution to 5.5;
[0115] (c) Add water for injection to the full amount of the prescr...
Embodiment 3
[0118] Embodiment 3: Preparation of ropivacaine hydrochloride freeze-dried powder injection
[0119] formula:
[0120] Ropivacaine hydrochloride 75mg,
[0121] Lactose 35mg,
[0122] Acid-base regulator: appropriate amount, adjust the pH to the specified value in the following preparation method,
[0123] Water for injection: add to 2.5ml.
[0124] Preparation method:
[0125] (a) take by weighing ropivacaine hydrochloride, lactose of prescription quantity, add prescription quantity 55% water for injection, stir and make dissolving;
[0126] (b) Add activated carbon (0.15% by volume of the medicinal solution) to the medicinal solution obtained in the previous step, adjust the pH value of the solution to 3.5 with an acid-base regulator, stir for 2.3 hours at a temperature of 30° C., filter for decarbonization, and use an acid-base regulator to The regulator adjusts the pH4.5 of the solution;
[0127] (c) Add water for injection to the full amount of the prescription...
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