Oral paracetamol formulations
First Claim
Patent Images
1. A swallow formulation comprising paracetamol particles having a volume median diameter (D50) of less than 350 μ
- m and a surface area of greater than 0.07 m2g−
1, a pH modulating agent in an amount sufficient to neutralize from about 0.6 mL to about 110 mL 0.1 N hydrochloric acid and/or to neutralize from about 0.06 mmol to about 11 mmol of acid; and
an agent which facilitates water uptake into the formulation;
wherein at least 70% of the paracetamol is dissolved from the swallow formulation within 180 seconds in USP dissolution apparatus 2 with 900 mL 0.05 N hydrochloric acid at 30 rpm and 37°
C., wherein the weight ratio of the paracetamol and the pH modulating agent is between 1.8;
1 and 2.5;
1 and the weight ratio of the agent which facilitates water uptake into the formulation and the pH modulating agent is between 0.5;
1 and 1.5;
1.
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Abstract
The present invention relates generally to formulations comprising paracetamol. More particularly, the present invention provides a swallow formulation comprising paracetamol which facilitates the rapid delivery of paracetamol into the circulatory system following oral administration. The present invention further relates to methods for inducing efficient pain relief including an analgesic effect by the administration of the paracetamol formulation.
130 Citations
40 Claims
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1. A swallow formulation comprising paracetamol particles having a volume median diameter (D50) of less than 350 μ
- m and a surface area of greater than 0.07 m2g−
1, a pH modulating agent in an amount sufficient to neutralize from about 0.6 mL to about 110 mL 0.1 N hydrochloric acid and/or to neutralize from about 0.06 mmol to about 11 mmol of acid; and
an agent which facilitates water uptake into the formulation;
wherein at least 70% of the paracetamol is dissolved from the swallow formulation within 180 seconds in USP dissolution apparatus 2 with 900 mL 0.05 N hydrochloric acid at 30 rpm and 37°
C., wherein the weight ratio of the paracetamol and the pH modulating agent is between 1.8;
1 and 2.5;
1 and the weight ratio of the agent which facilitates water uptake into the formulation and the pH modulating agent is between 0.5;
1 and 1.5;
1. - View Dependent Claims (4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
- m and a surface area of greater than 0.07 m2g−
-
2. A swallow formulation comprising paracetamol particles having a volume median diameter (D50) of less than 350 μ
- m and a surface area of greater than 0.07 m2g−
1, a pH modulating agent in an amount sufficient to neutralize from about 0.6 mL to about 110 mL 0.1 N hydrochloric acid and/or to neutralize from about 0.06 mmol to about 11 mmol of acid; and
an agent which facilitates water uptake into the formulation;
wherein at least one pH modulating agent is a carbonate in an amount that will neutralise 0.01 to 9.0 millimoles of hydrochloric acid and is present in an amount from about 1% to 50% by weight of the swallow formulation;
wherein at least about 5% of the paracetamol is dissolved from the swallow formulation within 300 seconds at 0 rpm when the dissolution is measured in United States Pharmacopoeia (USP) dissolution apparatus 2 with 900 mL 0.0033 N hydrochloric acid at 37°
C., wherein the weight ratio of the paracetamol and the pH modulating agent is between 1.8;
1 and 2.5;
1 and the weight ratio of the agent which facilitates water uptake into the formulation and the pH modulating agent is between 0.5;
1 and 1.5;
1. - View Dependent Claims (5)
- m and a surface area of greater than 0.07 m2g−
-
3. A swallow formulation comprising paracetamol particles having a volume median diameter (D50) of less than 350 μ
- m and a surface area of greater than 0.07 m2·
g−
1, a pH modulating agent in an amount sufficient to neutralize from about 0.6 mL to about 110 mL 0.1 N hydrochloric acid and/or to neutralize from about 0.06 mmol to about 11 mmol of acid; and
an agent which facilitates water uptake into the formulation;wherein (a) at least about 5% of the paracetamol is dissolved from the swallow formulation within 300 seconds at 0 rpm, and (b) at least about 70% of the paracetamol is dissolved from the swallow formulation within 180 seconds at 30 rpm, when the dissolution is measured in United States Pharmacopoeia (USP) dissolution apparatus 2 with 900 mL 0.0033 N hydrochloric acid at 37°
C., wherein the weight ratio of the paracetamol and the pH modulating agent is between 1.8;
1 and 2.5;
1 and the weight ratio of the agent which facilitates water uptake into the formulation and the pH modulating agent is between 0.5;
1 and 1.5;
1.
- m and a surface area of greater than 0.07 m2·
Specification