Dual action, inhaled formulations providing both an immediate and sustained release profile
Methods for formulating immediate and sustained release anti-infectives and delivery of such for treatment of respiratory tract infections and other medical conditions, and devices and formulations used in connection with such are described.
1. A formulation, comprising:
free unencapsulated ciprofloxacin;
liposome-encapsulated ciprofloxacin wherein the liposomes have an average particle size of about 75 nm to about 120 nm and are unilamellar, and comprised of cholesterol and hydrogenated soy phosphatidyl-choline (HSPC)-a semi-synthetic fully hydrogenated derivative of nature soy lecithin at a ratio of 29.4 to 70.6; and
an excipient suitable for pulmonary delivery comprised of sodium acetate and an isotonic buffer
wherein the liposomes maintain integrity when aerosolized and provide a ciprofloxacin release rate of 0.5% to 10% per hour.
2. A formulation for aerosolized delivery, comprising:
free unencapsulated ciprofloxacin;
a pharmaceutically acceptable excipient; and
liposome-encapsulated ciprofloxacin wherein the liposomes comprise cholesterol and hydrogenated soy phosphatidyl-choline (HSPC) at a ratio of 29.4 to 70.6, and are unilamellar and wherein the liposomes maintain integrity when aerosolized, and provide a ciprofloxacin release rate of 0.5% to 10% per hour.
3. The formulation of claim 2 , wherein the liposomes have a diameter in a range of from about 10 nm to about 10 μm.
4. The formulation of claim 3 , further comprising:
an additional drug selected from the group consisting of a bronchodilator and an anti-inflammatory drug.
5. The formulation of claim 4 , wherein the additional drug is a bronchodilator chosen from β-adrenergic receptor agonists, antimuscarinics and combinations thereof.
6. The formulation of claim 4 , wherein the additional drug is an antiinflammatory chosen from corticosteroids, leukotriene receptor antagonists, leukotriene synthesis inhibitors, and cyclooxygenase inhibitors.
7. The formulation of claim 2 , wherein the free ciprofloxacin comprises between about 1 and about 75% of the total free and liposome-encapsulated ciprofloxacin.
8. A formulation for aerosolized delivery, comprising:
a pharmaceutically acceptable excipient; and
liposome-encapsulated ciprofloxacin wherein the liposomes comprise cholesterol and hydrogenated soy phosphatidyl-choline (HSPC) at a ratio of 29.4 to 70.6, and are unilamellar and wherein the liposomes and maintain integrity when aerosolized, and provide a ciprofloxacin release rate of 0.5% to 20% per hour.
9. The formulation of claim 8 , wherein the liposomes provide a ciprofloxacin release rate of 2% to 10% per hour.
10. The formulation of claim 8 , wherein the liposomes have an average particles size of about 75 nm to about 120 nm.
11. The formulation of claim 8 , wherein the liposomes have a diameter in a of range from about 10 nm to about 10 μm.
12. The formulation of claim 10 , further comprising:
an additional drug selected from the group consisting of a bronchodilator and an anti-inflammatory drug.
13. The formulation of claim 12 , wherein the additional drug is a bronchodilator chosen from β-adrenergic receptor agonists, antimuscarinics and combinations thereof.
14. The formulation of claim 12 , wherein the additional drug is an antiinflammatory chosen from corticosteroids, leukotriene receptor antagonists, leukotriene synthesis inhibitors, and cyclooxygenase inhibitors.