Parasiticidal oral veterinary compositions comprising systemically-acting active agents, methods and uses thereof

1. A solid soft chewable veterinary composition effective for treating and/or preventing fleas or ticks infection or infestation in an animal comprising:

a) an isoxazoline active agent of Formula (II) at a concentration of about 5% to about 15% by weight:

 or a pharmaceutically acceptable salt thereof; and

b) a pharmaceutically acceptable carrier,

wherein the carrier comprises a binder, a surfactant, a filler and a humectant, wherein the binder is PEG 3350; the surfactant is sodium lauryl sulfate at a concentration of about 1 to about 5% (w/w);

the filler is corn starch or pre-gelatinized corn starch or a combination thereof; and the humectant is glycerol;

wherein the effect is achieved at a dosage of about 10 mg/kg to about 100 mg/kg of active agent of Formula (II); and

wherein the composition is effective for fleas for at least 79 days.

2. The solid soft chewable veterinary composition of claim 1 , wherein the humectant further comprises soy bean oil.

3. The solid soft chewable veterinary composition of claim 1 , wherein the carrier further comprises a lubricant which is magnesium stearate.

4. The solid soft chewable veterinary composition of claim 1 , wherein the carrier further comprises a flavoring agent which is liver extract, pork, or artificial pork.

5. The solid soft chewable veterinary composition of claim 4 , wherein the flavoring agent is present in a concentration of about 10% to about 30% (w/w).

6. The solid soft chewable veterinary composition of claim 1 , wherein the filler is present in a concentration of about 10% to about 40% (w/w).

7. The solid soft chewable veterinary composition of claim 3 , wherein the lubricant is present in a concentration of about 0.01 to about 20% (w/w).

8. The solid soft chewable veterinary composition of claim 1 , wherein the humectant is present in a concentration of about 1% to about 10% (w/w).

9. The solid soft chewable veterinary composition of claim 1 , wherein the binder is present at a concentration of about 1% to about 20% (w/w).

10. The solid soft chewable veterinary composition of claim 1 , wherein the pharmaceutically acceptable salt is a dicarboxylic acid or an aromatic salt.

11. A solid soft chewable veterinary composition effective for treating and/or preventing fleas or ticks infection or infestation in an animal comprising:

a) an isoxazoline active agent of Formula (II) at a concentration of about 1% to about 20% by weight:

 or a pharmaceutically acceptable salt thereof; and

b) a pharmaceutically acceptable carrier,

wherein the carrier comprises:

i) a filler which is corn starch or pre-gelatinized corn starch or a combination thereof;

ii) a flavoring agent which is natural or artificial meat flavor;

iii) a binder which is polyethylene glycol;

iv) a solvent which is a triglyceride;

v) a surfactant which is sodium lauryl sulfate at a concentration of about 1 to about 5% (w/w);

vi) a humectant which is glycerol;

vii) optionally an antioxidant; and

viii) optionally a preservative;

wherein the effect is achieved at a dosage of about 10 mg/kg to about 100 mg/kg of active agent of Formula (II); and

wherein the composition is effective for fleas for at least 79 days after administration to the animal.

12. A solid soft chewable veterinary composition effective for treating and/or preventing fleas or ticks infestation in an animal comprising:

a) an isoxazoline active agent of Formula (II) at a concentration of about 1% to about 20% by weight:

 or a pharmaceutically acceptable salt thereof; and

b) a pharmaceutically acceptable carrier,

wherein the carrier comprises a binder, a surfactant, a filler and a humectant,

wherein

the binder is PEG 3350,

the surfactant is sodium lauryl sulfate at a concentration of about 1 to about 5% (w/w),

the filler is corn starch or pre-gelatinized corn starch or a combination thereof, and

the humectant is glycerol;

wherein the effect is achieved at a dosage of about 10 mg/kg to about 100 mg/kg of active agent of Formula (II); and

wherein the composition is effective for fleas for at least 79 days after administration to the animal.

13. The solid soft chewable veterinary composition of claim 1 wherein the effect is achieved at a dosage of about 10 mg/kg to about 50 mg/kg of active agent of Formula (II).

14. The solid soft chewable veterinary composition of claim 11 wherein the effect is achieved at a dosage of about 10 mg/kg to about 50 mg/kg of active agent of Formula (II).

15. The solid soft chewable veterinary composition of claim 12 wherein the effect is achieved at a dosage of about 10 mg/kg to about 50 mg/kg of active agent of Formula (II).

16. The solid soft chewable veterinary composition of claim 1 wherein the effect provides an efficacy of at least about 70% against fleas about 8 hours after administration to the animal.

17. The solid soft chewable veterinary composition of claim 11 wherein the effect provides an efficacy of at least about 70% against fleas about 8 hours after administration to the animal.

18. The solid soft chewable veterinary composition of claim 12 wherein the effect provides an efficacy of at least about 70% against fleas about 8 hours after administration to the animal.

19. The solid soft chewable veterinary composition of claim 1 wherein the effect is at least about 90% against fleas about 12 hours after administration to the animal.

20. The solid soft chewable veterinary composition of claim 11 wherein the effect is at least about 90% against fleas about 12 hours after administration to the animal.

21. The solid soft chewable veterinary composition of claim 12 wherein the effect is at least about 90% against fleas about 12 hours after administration to the animal.

22. The solid soft chewable veterinary composition of claim 1 wherein the composition is effective for ticks for at least about 44 days after administration to the animal.

23. The solid soft chewable veterinary composition of claim 11 wherein the composition is effective for ticks for at least about 44 days after administration to the animal.

24. The solid soft chewable veterinary composition of claim 12 wherein the composition is effective for ticks for at least about 44 days after administration to the animal.