AVOCA CAUSTIC PENCIL

The tip is moistened with suitably clean water and applied topically to the area to be treated. Surrounding areas of healthy skin, etc. should be protected from the caustic/staining action of silver nitrate by a suitable barrier such as petroleum jelly, where necessary and practicable.

Skin and subcutaneous tissue disorders Chronic application of silver nitrate or its products to conjunctive, mucous membranes or open wounds may lead to a condition known as argyria, an accumulation of silver metal or compounds in the connective tissues which gives rise to a local or general bluish-black appearance.

This is thought to be a completely harmless cosmetic effect only, but it may persist indefinitely or disappear only very slowly. Absorption of nitrate following reduction of nitrate by certain bacteria in some wounds may cause methaemoglobinaemia.

There is a risk of electrolyte disturbances. Cases of either argyria or methaemoglobinaemia are very rare (<1/10,000) and are likely to arise only under exceptional circumstances of prolonged use of large quantities of sliver nitrate.

Paediatric population No data are available Reporting of suspected adverse reactions Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product.

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For single patient use only. Must be used under medical supervision. The instruction must be followed in view of the caustic/staining nature of the product. Paediatric population No data are available

Hypersensitivity to the silver nitrate or to the excipient potassium nitrate. Not for use near the eyes or other sensitive areas of the body, due to the corrosive / staining action of the product. Should not be used for genital warts.