Drug – bio-affecting and body treating compositions – Inorganic active ingredient containing – Heavy metal or compound thereof
Reexamination Certificate
2000-05-22
2001-11-27
Pak, John (Department: 1616)
Drug, bio-affecting and body treating compositions
Inorganic active ingredient containing
Heavy metal or compound thereof
C424S641000, C424SDIG001, C514S171000, C514S179000, C514S729000, C514S734000, C514S783000, C514S786000, C514S789000, C514S882000, C514S966000, C514S969000
Reexamination Certificate
active
06322820
ABSTRACT:
The present invention relates to novel methods and compositions for the relief of hemorrhoidal conditions.
BACKGROUND OF THE INVENTION
Hemorrhoids are the result of swollen, normally present blood vessels in and around the anus and lower rectum. When these normally present veins become abnormally enlarged or dilated, they are called hemorrhoids (also known as hemorrhoids or piles). In this respect, they have been compared to varicose veins in the legs. Hemorrhoids may be either inside the anus (internal) or under the skin around the anus (external).
Hemorrhoids are extremely common in both the male and female populations with it being reported that the majority of people will have experience of or problems from hemorrhoids during their life. Symptoms of hemorrhoids include anal bleeding while some external hemorrhoids may cause painful swelling or a hard lump. Hemorrhoids are usually not dangerous or life threatening although it is important that they be evaluated to exclude more serious causes of the symptoms such as polyps and cancer.
A great deal of the medical treatment of hemorrhoids is aimed at relieving the symptoms and these can include warm tub or sitz baths, ice packs to reduce swelling and application of a hemorrhoidal cream or suppository to the affected area for a limited time. This may be accompanied by changes to the diet and it is often recommended to increase the amount of fiber and fluids in the diet to result in softer bulkier stools to eliminate the pressure on the hemorrhoids.
Surgical treatment includes rubber band ligation to cut off circulation to the hemorrhoid whereby it withers away within a few days. Sclerotherapy comprises the injection of a chemical solution around the blood vessel to shrink the hemorrhoid. Other techniques used may include electrical or laser heat or in the case of more extensive or severe hemorrhoids, an operation called an hemorrhoidectomy may be performed.
As aforementioned, there are certain creams and suppositories which are known in the art to relieve the symptoms of hemorrhoids.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a hemorrhoidal cream which is simple to manufacture and is effective against the symptoms of hemorrhoids.
According to one aspect of the present invention, there is provided a composition of matter for treating hemorrhoids, the composition of matter comprising a pharmaceutically acceptable carrier, between about 1% and about 10% by weight of zinc oxide, between about 0.2% and about 5% by weight of resorcinol, and between about 0.1% and about 3% by weight of menthol.
In a further aspect of the present invention, there is provided a composition of matter for treating hemorrhoids, the composition of matter comprising a pharmaceutically acceptable carrier, between about 2% and about 8% by weight of zinc oxide, between about 0.4% and about 3% by weight of resorcinol, and between about 0.2% and about 2% by weight of menthol.
In a further aspect of the present invention, there is provided a method for the treatment of hemorrhoids, the method comprising the step of applying to an affected area a cream comprising a pharmaceutically acceptable carrier, between about 1% and about 10% by weight of zinc oxide, between about 0.2% and about 5% by weight of resorcinol, and between about 0.1% and about 3% by weight of menthol.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A composition of the present invention has, as set forth above, active ingredients comprised of zinc oxide, resorcinol, and menthol. Optionally, the composition may also include hydrocortisone.
The zinc oxide is present in an amount of between about 1% and about 10% by weight and preferably between about 2% and about 8% by weight. Even more preferably, the zinc oxide is present in an amount of between about 3% and about 7% by weight.
The resorcinol is present in an amount of between about 0.2% and about 5% by weight and preferably between about 0.4% and about 3% by weight. Even more preferably, the resorcinol is present in an amount of between about 0.5% and about 2% by weight.
The menthol is present in an amount of between about 0.1% and about 3% by weight and preferably between about 0.2% and about 2% by weight. Even more preferably, the menthol is present in an amount of between about 0.3% and about 1% by weight.
The composition may include further active ingredients. Thus, the composition may also include hydrocortisone, the hydrocortisone being present in an amount of between 0.1% and 3% by weight and more preferably, being present in an amount of between 0.5% and 2% by weight.
The carrier may be any suitable and the composition may be in the form of either a cream or ointment. Carriers can include glycerin or waxes with a preferred carrier being white petroleum jelly, the petroleum jelly being present in an amount of between 76% and 98.7% by weight. Alternatively, the composition may be incorporated in a suppository.
The composition may be applied either by an applicator or other means although if the applicator increases pain, it should not be used. The affected area should be washed prior to applying the product. The product should be applied morning and evening with not more than six applications per day. Alternatively, the composition could be incorporated in a substrate as a “wipe” and then applied.
The preparation of the composition may be carried out according to conventional methods. Thus, the active substances and auxiliary or carrier substances may be suitably mixed by stirring or homogenization using conventional devices. The incorporation of the active ingredients can be carried out at elevated temperatures in order to facilitate the process. To this end, one may use other inert carrier materials to assist in the process. One such material would be sweet almond oil into which the resorcinol is dissolved. The almond oil may be present in an amount of between 1% and 4% by weight.
Preferably, the resorcinol is incorporated in the almond oil at a temperature of between 60° C. and 90° C. The composition of resorcinol and sweet almond oil is then added to white petroleum jelly which is at a temperature of between 30° C. and 60° C.
Subsequently, the zinc oxide and the menthol may be added and the product cooled.
REFERENCES:
patent: 5858371 (1999-01-01), Singh et al.
Martindale The Extra Pharmacopoeia, The Pharmaceutical Press, London, pp. 771-772, 1334, 1627, 1993.
Fincham Eric
Pak John
LandOfFree
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