U.S. patent application number 11/333936 was filed with the patent office on 2006-06-08 for veterinary delivery systems and methods of delivering effective agents to animals.
Invention is credited to John Berggren, Paul Gabel, Daniel S. Leon, Thomas Leon.
Application Number | 20060121096 11/333936 |
Document ID | / |
Family ID | 23351594 |
Filed Date | 2006-06-08 |
United States Patent
Application |
20060121096 |
Kind Code |
A1 |
Leon; Thomas ; et
al. |
June 8, 2006 |
Veterinary delivery systems and methods of delivering effective
agents to animals
Abstract
A veterinary delivery system in the form of a pliable film
comprising at least one binder, at least one lubricant, at least
one solvent for the binder and lubricant, and an effective amount
of at least one effective agent. According to one embodiment, a
flavorant is included in a pliable hydrophilic film in order to
enhance oral acceptability by the animal. In other embodiments, the
films preferably have a moisture content of about 2-15%, preferably
about 3-7% by weight. The hydrophilic films most preferably have at
least one effective agent distributed homogeneously throughout the
film. Also disclosed are methods of delivering veterinary delivery
systems wherein a pliable, hydrophilic film comprising at least one
effective agent is placed within the oral cavity of an animal.
Inventors: |
Leon; Thomas; (Oyster Bay,
NY) ; Berggren; John; (Oyster Bay, NY) ;
Gabel; Paul; (Oyster Bay, NY) ; Leon; Daniel S.;
(Oyster Bay, NY) |
Correspondence
Address: |
Daniel P. Burke
Suite 135
300 Rabro Drive
Hauppauge
NY
11788
US
|
Family ID: |
23351594 |
Appl. No.: |
11/333936 |
Filed: |
January 18, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10730712 |
Dec 5, 2003 |
7005142 |
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11333936 |
Jan 18, 2006 |
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10438996 |
May 15, 2003 |
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10730712 |
Dec 5, 2003 |
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09344693 |
Jun 25, 1999 |
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11333936 |
Jan 18, 2006 |
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Current U.S.
Class: |
424/442 ;
424/523 |
Current CPC
Class: |
A61K 9/006 20130101;
A23K 50/40 20160501; A23K 20/168 20160501; A23K 20/195 20160501;
A61K 9/0056 20130101; A61K 9/7007 20130101 |
Class at
Publication: |
424/442 ;
424/523 |
International
Class: |
A23K 1/165 20060101
A23K001/165; A61K 35/60 20060101 A61K035/60 |
Claims
1. A veterinary delivery system comprising: a pliable film
comprising at least one binder, at least one lubricant, at least
one solvent for said binder and said lubricant, and an effective
amount of at least one effective agent.
2. A veterinary delivery system according to claim 1 wherein said
effective agent is a pharmaceutically active component.
3. A veterinary delivery system according to claim 1 wherein said
effective agent is a therapeutic agent.
4. A veterinary delivery system according to claim 1 wherein said
effective agent is a cosmetic agent.
5. A veterinary delivery system according to claim 1 wherein said
film further comprises a flavorant.
6. A veterinary delivery system according to claim 2 wherein said
flavorant is selected from the group consisting of genuine and
artificial beef, chicken, liver, bacon, cheese, apple, smoke and
fish flavorants, mint flavorants and combinations thereof.
7. A veterinary delivery system according to claim 1 wherein said
film has a moisture content of not greater than about 15% by
weight.
8. A veterinary delivery system according to claim 1 wherein said
film has a moisture content of about 3%-7% by weight.
9. A veterinary delivery system according to claim 1 wherein said
film has a moisture content of about 4-6% by weight.
10. A veterinary delivery system according to claim 1 wherein said
film has a moisture content of about 4.5%-5.5% by weight.
11. A veterinary delivery system according to claim 1 wherein said
lubricant is selected from the group consisting of glycerins,
glycols, oils and combinations thereof.
12. A veterinary delivery system according to claim 1 wherein said
lubricant comprises propylene glycol.
13. A veterinary delivery system according to claim 1 wherein said
lubricant comprises a fish oil.
14. A veterinary delivery system according to claim 1 wherein said
lubricant comprises a vegetable oil.
15. A veterinary delivery system according to claim 1 wherein said
binder comprises polyvinyl alcohol.
16. A veterinary delivery system according to claim 1 wherein said
binder comprises a methylcellulose.
17. A veterinary delivery system according to claim 1 wherein said
binder comprises hydroxypropyl methycellulose.
18. A veterinary delivery system according to claim 1 wherein said
film further comprises a filler.
19. A veterinary delivery system according to claim 18 wherein said
filler is selected from the group consisting of cornmeal,
cornstarch, potato starch, bone meal, corn syrup, wheat germ,
brewers yeast, xanthan gum, carrageenan and combinations
thereof.
20. A veterinary delivery system according to claim 1 wherein said
effective agent is selected from the group consisting of
antibiotics, pain relievers, anti-inflammatory agents, anti-viral
agents, vaccines, wormers, heartwormers, nutritional supplements,
hypothyroidism medication, arthritis medication, agents for the
control of tartar and plaque, incontinence medication, pain
relievers, agents for treatment of bacterial diseases and
coccidiosis, nutritional supplements and combinations thereof.
21. A veterinary delivery system according to claim 1 wherein said
solvent comprises water.
22. A veterinary delivery system according to claim 1 wherein said
solvent comprises an organic solvent.
23. A veterinary delivery system according to claim 22 wherein said
solvent comprises ethanol.
24. A veterinary delivery system according to claim 1 wherein said
film further comprises at least one preservative.
25. A veterinary delivery system according to claim 24 wherein said
preservative is selected from the group consisting of methyl
paraben, propylparaben, ethylenediamine-tetraacetic acid (EDTA),
stearic acid, diazolidinyl urea, imdiazolidinyl urea, and
combinations thereof.
26. A veterinary delivery system according to claim 1 wherein at
least one pharmaceutically active component is soluble in said
solvent.
27. A veterinary delivery system according to claim 1 wherein at
least one pharmaceutically active component is not soluble in said
solvent.
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42. A veterinary care delivery system comprising: a pliable film
comprising: at least one binder; at least one lubricant; at least
one solvent for said binder and said lubricant; an effective amount
of at least one effective agent; and at least one flavorant.
43. A veterinary care delivery system according to claim 42 wherein
said pliable film is hydrophilic.
44. (canceled)
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70. A method of delivering an effective agent to an animal
comprising the steps of: providing a pliable film comprising at
least one binder, at least one lubricant, at least one solvent for
said binder and said lubricant, and an effective amount of at least
one effective agent; and placing said film within the oral cavity
of said animal.
71. (canceled)
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Description
[0001] This is a continuation of U.S. Ser. No. 09/344,693 filed
Jun. 25, 1999.
[0002] The present invention is directed to veterinary care and,
more particularly, to veterinary delivery systems and methods of
delivering effective agents to animals.
BACKGROUND
[0003] Effective veterinary care is very important to animal owners
as well as the rest of society. Many people own household pets,
such as dogs and cats, and often become emotionally attached to
those pets. Other animals, such as dogs used for police work and
search and rescue operations, race horses, etc, each play a
significant role in society. The proper and efficient veterinary
care of these and other animals is very important.
[0004] The administration of pharmaceuticals, such as anti-biotics,
anti-inflammatory agents, anti-viral agents, vaccines and wormers,
are important to the health of these animals. Typical methods of
administering pharmaceuticals to animals include vascular
injections, muscular injections and oral administration of liquids
or pills. Disadvantages of these known pharmaceutical delivery
methods include difficulty in administration, pain to the animals,
difficulty in measuring the dosages when liquids or pills are added
to animal feed, since, for example, some time a number of animals
will share a common feed container and animals will sometimes try
to spit out medicine.
[0005] It would therefore be desirable to provide a delivery system
for effective agents which is easier to administer. It would also
be desirable to provide veterinary delivery systems which have a
higher dose delivery accuracy than previous feed-mixed delivery
systems.
[0006] It would also be desirable to provide a veterinary
pharmaceutical delivery systems that can be at least partially
absorbed into the animals vascular system through mucous membranes
while other portions are ingested.
[0007] It would also be desirable to provide methods for delivering
agents effective in the care of animals which provide quick
efficacy, are easier to store, have longer storage shelf lives and
which are less prone to being spit out by the animal receiving the
effective agent.
SUMMARY OF THE INVENTION
[0008] One aspect of the present invention comprises a veterinary
delivery system in the form of a pliable hydrophilic film
comprising at least one binder, at least one lubricant, at least
one solvent for the binder and lubricant, and an effective amount
of at least one effective agent. As used herein, the term
"effective agent" is meant to include any compound which has an
effect upon one or more health properties of the recipient animal.
For example, effective agents include compounds which are
therapeutically active and are designed to treat a symptom of the
animal such as illness, bad breath, incontinence, or others
discussed below. An effective agent can also comprise a compound
having cosmetic effects which will change any visual aspect of the
animal, such as an agent which is designed to provide a healthier
coat. Other pharmaceuticals are also included such as
pharmaceutical actives, and is not limited to prescription
medicines.
[0009] According to another preferred embodiment of the present
invention, at least one flavorant is also included in a pliable
hydrophilic film in order to enhance oral acceptability by the
animal.
[0010] According to another aspect of the present invention, films
preferably have a moisture content of not greater than about 15% by
weight and most preferably have moisture content of about 3-7% by
weight. The hydrophilic films most preferably have at least one
effective agent distributed homogeneously throughout the film.
[0011] The present invention also comprises methods of delivering
effective agents wherein a tacky hydrophilic film comprising at
least one effective agent is placed within the oral cavity of an
animal.
[0012] These and other embodiments of the present invention are
described in greater detail below.
DETAILED DESCRIPTION
[0013] The various aspects of the present invention relate to
veterinary pharmaceutical delivery systems and methods of
delivering effective agents to animals. As used herein, the term
"animals" is meant to indicate mammals, and to exclude humans. The
novel methods and delivery systems described herein utilize a
pliable, preferably hydrophilic, film which contains an effective
amount of at least one effective agent. The preferred films of the
present invention advantageously become sufficiently sticky upon
contact with the mucousal membrane or tongue of an animal such that
the film adheres to the animal's tongue or mucousal membrane and
generally is difficult to spit out or be dislodged. The films are
sticky upon contact due to their hydrophilic nature and relatively
low initial moisture content. In order to further enhance the
retention of the delivery systems films by the animal, preferred
embodiments of the present invention also advantageously comprise
flavorants which are particularly adapted to be acceptable by the
particular animal.
[0014] One embodiment of the present invention comprises a pliable
film comprising at least one binding agent, at least one lubricant,
a solvent for the binding agent and the lubricant, and an effective
amount of at least one effective agent. The binding agent provides
the structural integrity to the pliable film, either chemically or
physically, and may comprise polyvinyl alcohol, methycelluloses
such as hydroxypropyl methylcellulose (HPMC) or
carboxymethylcellulose, gelatins, starches, either alone or in
combination. The final film comprises up to about 95% by weight of
the binding agent, and preferably about 40% to 90% by weight, more
preferably about 50% to 75% by weight.
[0015] The lubricant can comprise one or more of glycerins, glycols
such as propylene glycols, oils such as fish oils or vegetable
oils, and combinations thereof. The lubricant of the final film
should generally be not greater than about 45% by weight of the
final film, preferably not greater than about 25%, more preferably
about 2 to 15% and most preferably about 4 to 8% by weight. Unless
otherwise stated in this application, all percentages are by weight
and are expressed as a percentage of the final film.
[0016] In order to properly blend the binding agent and lubricant,
a solvent such as water or an organic solvent such as ethanol is
preferably employed. In the final film, the solvent preferably
comprises about 2 to 15% by weight of solvent and most preferably
about 3 to 7% by weight. If desired, more than one solvent can be
used.
[0017] The effective agents of the present invention can comprise a
wide range of therapeutic actives, cosmetic agents and other
veterinary pharmaceuticals such an antibiotics, pain relievers,
anti-inflammatory agents, anti-viral agents, vaccines, wormers,
heart wormers, nutritional supplements, hypothyroidism medication,
arthritis medication, incontinence medication, agents for the
control of tartar and plaque, pain relievers, agents for treatment
of bacterial diseases and coccidiosis, and combinations thereof.
For example, the effective agents can comprise antibiotics such as
sulfamethoxazole combined with trimethoprim (ditrim), penicillin,
amoxicillin, ampicillin, cephalexin, metronidazole, hypothyroidism
medication, such as levothyroxine, agents for treatment of
bacterial diseases and coccidiosis such as sulfadimethoxine, pain
relievers such as buffered aspirin and prednisone, arthritis
medication such as glucosamine HCl, chondroitin sulfate extracts
(shark cartilage), minerals-calcium, manganese, magnesium, ascorbic
acid (vitamin C), wormers and heartwormers such as ivermectin,
fenbendazole, milbemycin oxime, filaribits, parental pamoate,
toluene, dichlorophene, piperazine, and agents for the control of
tartar and plaque such as tetrasodium pryrophosphate. The amount of
the active ingredient employed in the initial mixture will depend
upon the desired dosage. According to preferred embodiments of the
present invention, the effective agent is preferably homogeneously
distributed throughout the film.
[0018] In order to enhance the acceptability of the delivery
systems of the present invention, preferred embodiments comprise
flavoring agents such as beef, chicken, liver, bacon, cheese,
apple, smoke, fish, mint such as spearmint or peppermint, and
combinations thereof and others.
[0019] Various embodiments of the present invention can also
comprise fillers to modify the taste, texture, palpability,
stickiness, aroma or roughage characteristics of the film. Fillers
can be readily chosen and can include fillers such as cornmeal,
cornstarch, potato starch, bone meal, corn syrup, wheat germ,
brewers yeast, xanthan gum, carrageenan and combinations
thereof.
[0020] It is also in the scope of the present invention to include
preservatives such as methyl paraben, propylparaben,
ethylenediamine-tetraacetic acid (EDTA), stearic acid, diazolidinyl
urea, imdiazolidinyl urea, and combinations thereof in order to
enhance shelf stability and minimize microbial growth from
contamination.
[0021] The delivery systems of the present invention can
advantageously be manufactured on a bulk scale. In order to achieve
the desired concentration of effective agent in the dosage form,
preferred embodiments are manufactured on a weight by weight
concentration of the total product. While the following description
utilizes water-soluble ingredients, based upon the solubility of
the effective agent, the base can be formulated to be either water
soluble or non-water soluble.
Compounding
[0022] Ingredients are individually weighed or otherwise measured.
Some formulas require an emulsion to be formed, based on the
solubility of the active or other ingredients. Some ingredients may
need to be combined in a series of smaller tanks, prior to being
added to a larger tank, again depending on solubility, temperature
and mixing characteristics. The ingredients are mixed and/or heated
accordingly until a homogeneous solution is achieved. Because
certain ingredients will require heat to aid dissolution, the tanks
can be heated to reduce mixing time and increase ingredient
solubility. The bulk can be used hot or cooled based on viscosity
and physical characteristics required for the next phase of
manufacturing.
Distribution and/or Transfer onto Belt
[0023] The second step involves the transfer of the bulk evenly and
at the desired thickness onto a belt or sheet of material that will
be passed into an oven or otherwise treated to remove the majority
of the solvent, e.g. water, from the blend. The belt itself can be
made of a number of different materials including stainless steel,
teflon, aluminum, a high temperature chemical resistant polymer, or
metal alloy among others. The belt's physical dimensions are based
on the width of the bulk film roll desired, and the temperature of
the oven. There are a number of ways to cast or spread a bulk
solution onto the belt evenly and in a manner which advantageously
free from bubbles and striations. The following are some of these
methods. (1) The bulk can be pumped onto the belt and spread with a
blade or brush type device into an even displacement. (2) The bulk
can be pumped through a slot dye, with a controlled head pressure,
e.g. from about 10-200 psi., onto the belt with dimensions that
provide an even displacement of liquid bulk. (3) The bulk can be
sprayed through a series of nozzles onto the belt. (4) The bulk can
be spread thinly and evenly by mechanical means. (5) The bulk can
be poured onto the belt and allowed to run or be blown by forced
air to an even distribution. The conveyor type belt system is set
to move the product at a controlled speed to achieve the desired
drying of the product. For example, the belt can advance the
product from 2 to 35 feet per minute depending on the moisture in
the product, drying rate, and the desired thickness. The films of
the present invention generally should have thicknesses not greater
than about 0.05 inches, preferably not greater than about 0.025
inches, and most preferably about 0.0005 to about 0.010 of an
inch.
Evaporation
[0024] The belt passes through an oven or other type environmental
chamber at a controlled speed, humidity, ventilation, and
temperature to eliminate enough of the solvent to produce a film of
the desired consistency. To accomplish this, the belt speed and
oven temperature is controlled to avoid any degradation of the
components while eliminating enough solvent from the formulation to
achieve the desired pliability of the finished film. The optimal
conditions are typically between about 35.degree. C. and
100.degree. C. The result is sheets of film approximately the width
of the belt and the desired thickness. This bulk film contains a
known percentage of active drug product.
[0025] The physical dimensions of the finished product typically
can range in size from about 10-80 millimeters square, depending on
the size of the dose to be delivered. The films of the present
invention can be larger, smaller or a different shape without
departing from the scope of the present invention.
[0026] A person administering the dosage preferably places the film
on or under the tongue, between the cheek or gum, or on the pallet
of the animal where the film will advantageously adhere and begin
to dissolve. As the film dissolves, the effective agent is released
and absorbed through the mucous membrane in the mouth and/or the
gastro-intestinal tract.
[0027] Another aspect of the present invention is a method of
delivering an effective agent to an animal comprising the steps of
a method of delivering an effective agent to an animal comprising
the steps of providing a pliable film comprising at least one
binder, at least one lubricant, at least one solvent for said
binder and said lubricant, and an effective amount of at least one
effective agent; and placing said film within the oral cavity of
said animal, e.g. manually. These films are preferably
hydrophilic.
[0028] According to a still further embodiment, the film is placed
within the oral cavity of an animal by first placing the film on an
insert device and then placing at least a portion of the insert
device within the oral cavity of the animal. The film can be
adhered to the tongue of the animal or to a mucous membrane in the
oral cavity.
[0029] Another aspect of the present invention comprises a method
of delivering an effective agent utilizing a film, most preferably
a hydrophilic film into the oral cavity of an animal. Those skilled
in the art will appreciate that the veterinary care provider may
not wish to insert his hand into the oral cavity of certain
animals. Therefore, according to another aspect of the present
invention, a film of the present invention is placed on an insert
device and a portion of that insert device is placed within the
oral cavity of the animal. The insert device can comprise a wooden
dowel, a plastic applicator, something edible, such as a carrot or
other vegetable matter, a baked item such as a bread stick or
pretzel, or can be forced via pressurized air through a hollow tube
into the animal's oral cavity.
[0030] According to another embodiment of the present invention, a
plurality of effective agents are provided within a single film.
For example, according to one embodiment, one effective agent is
preferably absorbed transbuccally at a faster rate than a second
effective agent which is provided in that same film. For example,
the second effective agent may have time-release properties which,
when ingested, provide sustained release over some period of
time.
* * * * *