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Carnation Corn Caps
Self adhesive plaster
 

Each plaster contained salicylic acid BP 40%


Description
The product consists of a 22 x 57 mm piece of Nylon Weftstretch Zinc Oxide plaster onto which is centrally positioned a 19 mm wide vinyl adhesive tape with the adhesive surface facing upwards.


An adhesive red coloured felt ring is central to the plaster and contains pink Carnation Cornpaste.


The adhesive surfaces and paste are covered by two pieces of embossed unplasticised PVC film, one overlapping the other.


Indications
Treatment of corns and other small areas of keratinised skin.

 

Action and mode of mechanisms of actions
Salicylic acid is a keratolyic and acts upon the intercellular lipid bilayer, allowing the keratinized cells to be debrided. The felt ring relieves the pressure on the corn which gives immediate relief from pain. The salicylic acid in the ointment is slowly released into the skin which it softens (keratolysis). The adhesive strapping holds the ring and the ointment in place for two days while the ointment is working. After a few days application, usually about six days, the softened corn cap can be easily scraped away. Often, the centre of a hard corn can be removed whole.


Pharmacology
The formulation is designed to provide a gradual release of salicylic acid from the ointment to the restricted area of the corn. It is absorbed into the intercellular space in the outer epidermis.


Toxicology
As for all salicyates, absorption of large amounts can lead to salicyates poisoning. There is no danger from the small amount of salicylic acid in a corn cap. Occasional individuals who are sensitive to the rubber based adhesive suffer from a rash under the plaster.


Contraindications
Diabetes and impaired blood circulation of the feet unless used with a doctor permission. Application to broken skin. Salicylic acid is a powerful chemical and while quite safe to use on intact skin will cause inflammation and pain if applied to a cut, ulcer or deep crack.


Side effects / adverse reactions
Mild pain has been experienced.
Occasional sensitivity to the ingredients has been reported.


Precautions / warning
Carnation corn caps should not be used on healthy skin, by diabetics without their doctor's permission and should not be applied to skin that is cracked. Cracks in the skin may go very deep and will let in the salicylic acid. Salicylic acid is safe if applied to intact skin but when applied to bare tissue causes pain and inflammation. Old people are prone to these cracks in the skin and their tissues are less able to withstand the irritant action of the salicylic acid.

 

People who have diabetes may suffer from poor circulation in the feet, which often causes the skin of the toes to become hard, dry and cracked, this condition is easily confused with a corn and applying a corn cap will make matters worse. Therefore, diabetics should always check with their doctor to make sure it is safe to use a Carnation Corn Cap. Diabetics with poor circulation should have their feet regularly seen by a chiropodist.


Symptoms and treatment for overdosage and antidote

None available


Recommended dosage
Apply one corn plaster every two days, for ten days.

 

Instruction for use
First clean and thoroughly dry the skin around the corn. This is most important to ensure adhesion. Remove the facing material and position the felt ring very carefully so that it surrounds the corn. Firmly fix in position with the adhesive straps. When properly applied, it should not move or slip.

 

To obtain the best results, and in the interests of foot hygiene, change the corn cap every two days. Do not remove the corn until after the sixth day. If the corn is not easily removed, fit another cap and inspect every two days, changing the cap on each occasion.


Feet can be washed in the usual way whilst wearing the corn cap, and new caps fitted during or after the six days treatment if necessary.
Note: If the skin is not quite dry when the corn cap is applied, the plaster will not stick. After a bath, drying with a towel may leave the skin moist. Similarly, talcum powder can quickly kill the adhesive on the plaster.

 

Shelf-life
Three years from the date of manufacture, as printed on the external wallet (package).


Packing
Each retail wallet contained 6 pieces of corn plaster Store at less than 30C, away from direct sources of heat and humidity.

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