PHENYLEPHRINE RESINATE PARTICLES HAVING GOOD AUC

1 . A method of relieving nasal congestion, comprising administering a pharmaceutical formulation; said pharmaceutical formulation comprising a drug-resin complex comprising phenylephrine and a cation polystyrene sulfonate, wherein said cation polystyrene sulfonate comprises particle sizes of about 74 μm an to about 177 μm an prior to being combined with the phenylephrine.

2 . A method of treating the symptoms of cold, influenza, allergies, or non-allergic rhinitis in a subject in need thereof comprising administering a pharmaceutical formulation; said pharmaceutical formulation comprising a drug-resin complex comprising phenylephrine and cation polystyrene sulfonate, wherein said cation polystyrene sulfonate comprises particle sizes of about 74 μm to about 177 μm.

3 . The method of claim 1 , wherein the cation is selected from the group consisting of sodium, copper, zinc, iron, calcium, strontium, magnesium and lithium.

4 . The method of claim 3 , wherein the cation is sodium.

5 . The method of claim 4 , wherein the drug-resin complex is coated with a coating.

6 . The method of claim 5 , wherein the coating comprises a cellulose material.

7 . The method of claim 6 , wherein the cellulose material is selected from the group consisting of cellulose acetate and hydroxypropylcellulose.

8 . The method of claim 1 , wherein the pharmaceutical formulation is administered about every 6, 8, 12, 16, 20, or 24 hours.

9 . The method of claim 8 , wherein the pharmaceutical formulation is administered about every 12 hours.

10 . The method of claim 9 , wherein the pharmaceutical formulation is administered about every 8 hours.

11 . A method of maintaining sustained bioavailability of phenylephrine in a subject, comprising administering a pharmaceutical formulation comprising a drug-resin complex comprising phenylephrine and a cation polystyrene sulfonate, wherein said cation polystyrene sulfonate comprises particle sizes of about 74 μm to about 177 μm, wherein a concentration of phenylephrine in plasma of the subject is at least about 20, about 40, about 60, about 80, about 100, about 120, about 140, about 160, about 180, or about 200, pg/mL at about 6, about 8, about 12, about 16, about 20, or about 24 hours after ingestion.

12 . The method of claim 1 , wherein at least about 50% of the particles have particle sizes of about 74 μm to about 177 μm.

13 . The method of claim 12 , wherein at least about 80% of the particles have particle sizes of about 74 μm to about 177 μm.

14 . The method of claim 13 , wherein at least about 90% of the particles have particle sizes of about 74 μm to about 177 μm.

15 . The method of claim 1 , wherein less than 15% of the particles have a particle size less than about 44 μm.