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Avoca Wart & Verruca Treatment 95% 55g

Please note images are for illustration purposes only and may differ from the product(s) you receive


Avoca contains a medicine called silver nitrate and is used for removing warts including verrucas and excess tissue, for example tissue that forms during the healing process of wounds. Avoca works by destroying tissue on the surface layers of warts. Avoca Silver Nitrate Applicators are widely used throughout the world by physicians, surgeons, nurses, midwives, podiatrists, dentists, general practitioners and veterinary surgeons. Uses include nongenital warts and verrucas, granulation tissue, wound healing, stoma maintenance, umbilical stumps, skin tags and pain relief for aphthous stomatitis.

How to use video:


Caustic Pencil-Toughened Silver Nitrate BP. (Silver Nitrate BP 95% with Potassium Nitrate BP 5%) Plastic holder with caustic tip and accessories.


The treated surface layer of warts and verrucas should be filed away using a fine emery board, for some types of verruca it will be necessary to cut away the hard callous-like surface to get to the soft tissue underneath. Repeat this treatment for remaining wart/verruca tissue until the wart/verruca has gone. One drop of water is sufficient to treat two square inches of tissue. Place a single drop of water or more if required, on a clean non-absorbent surface such as an upturned drinking glass or stainless steel container. Gently stir the tip of a pencil/applicator in the drop of water for about 20 to 30 seconds. Silver nitrate from the tip is quickly dissolved in the water. Although the appearance of the water does not change, it is now rich in silver nitrate and any absorbent material (clothing, furniture etc.) that comes into contact with this water will turn black in time depending on exposure to light. There is no need to move quickly or finish within a certain time. Silver nitrate will continue to be dissolved as long as the unused tip remains in contact with water or body fluid. Touch the area to be treated with the wet tip so that silver nitrate solution is transferred to the area to be treated. Use light pressure, do not press or rub the area with the tip – silver nitrate is brittle and may break if too much pressure is applied. If the tip breaks, make sure you recover all pieces. Tweezers are the best way to do this. If the tip falls off, it can still be dissolved in water by holding it with tweezers. For warts, the treatment should be used once a day for 3 days, for verrucas, the treatment should be used one a day for 6 days. Take care to prevent solution wandering on to neighbouring skin by protecting the surrounding tissue with a barrier such as petroleum jelly. Transfer enough solution to cover all the area being treated. Allow the treated area to dry. After drying, treated granulation tissue will fall away. Repeat for remaining over granulation. Silver nitrate must not be used on genital warts or near eyes.


See label before use. Diabetics should consult a doctor if treating a verruca or wart. Not for genital warts.

Delivery & Returns

Standard Delivery

Standard UK delivery is £3.99* 

We aim to deliver orders within 3-5 working days to the shipping address provided by you in your order if the shipping address is in the UK.  For orders being delivered outside mainland UK, this will be longer and we cannot give a guaranteed delivery time due to the differences between carriers. Delivery timescales are estimates only. If you do not receive your order within 14 days of us confirming your order has been sent you must notify us and we will investigate the non-delivery provided. Orders from outside the UK have varied delivery charges, depending on the particular country.  Please note that in some instances you may be required to answer product related questions from our Pharmacist as part of the checkout process.  Failiure to answer these will cause delays.  Please allow extra time for Pharmacy approved products.  Please note that Bank Holidays do not count as working days.

Delivery charges for orders outside the UK will vary. *Northern Ireland delivery charges different

Express UK Delivery

Express UK delivery is £7.99*

Please note that Express delivery is only available on orders placed before 1pm (GMT) Monday to Friday in the UK.  After 1pm we cannot guarantee express delivery, even if it has been selected.  Please note that this is not a guaranteed next day service, but is an expedited delivery option.  Products which need to be approved by a pharmacist are not suitable for express delivery.

*Northern Ireland delivery charges different

Free Delivery on orders over £40*

This applies to orders delivered to UK addresses only.  *Exclusions may apply.


We hope you will be happy with any items you’ve ordered from us, but if you’re not entirely satisfied, you’ll find details of our returns policy on the link below.

Delivery outside of the EU

Please note that certain medicines and medical devices sold on this website cannot be purchased if you live outside of the European Union.


Please visit our Delivery & Returns page for more information.

Avoca Wart & Verruca Treatment 95% Cutaneous Stick

In stock

Avoca Wart & Verruca Treatment contains a 95% Silver Nitrate Caustic Pencil to help remove warts and verrucas.
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This product can only be sold by a registered pharmacy. To allow our pharmacist to ensure it is appropriate for you to use this product we will ask you to complete a short questionnaire after the checkout.  Please note that we are unable to ship restricted products to countries outside the UK.

 Failure to answer these questions may result in delays with your order.

 Please note that these items are not suitable for express delivery as they need to be checked by our pharmacist.  


Add your review

Excellent, quick verruca treatment Son picked up a verruca whilst on holiday last month and with school starting again soon we wanted a quick way of removing it. We were recommended Avoca by a friend and once applied quickly removed the verruca with minimal fuss. Worked much quicker than freezing tends to.

1 Review(s)