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Silver nitrate

Last updated on 13/07/2021.

Overview   |   Dosage   |    Side Effects   |   Precautions  |   Tips  |   Where To Buy  

GENERIC NAME: Silver nitrate



DRUG CLASS: Antimicrobial agents

SUB CLASS: Nitrates

USED FOR: Degranulation of tissue (warts and verrucas), Wound cauterization

– 40%, 95% (caustic pencil)

What is Silver nitrate for?

Silver nitrate belongs to a class of medication called nitrates. It is an inorganic chemical to inhibit the growth of bacteria and coagulate proteins to form an eschar on skin to cauterize a wound. It is used for degradation of tissue such as warts and verrucas and wound cauterization.

How to use it?

Silver nitrate is used on affected skin as a caustic pencil. The tip should be moistened by clean water first before applying. 

Apply once daily for 3 days for wart treatment, or apply once daily for 6 days for verrucas treatment. For wound cauterization, just simply apply a thin layer on the wound.

What are the side effects of Silver nitrate?

Common side effects of Silver nitrate include burning sensation of skin, skin irritation, or skin discoloration.

Who should not take Silver nitrate?

People who are allergic to Silver nitrate or any component of the formulation.

Pharmacist Tips:

Do not use it on healthy skin.

Common dosing schedule:

This schedule is for reference only, adjustments may be made according to individual needs.

Some common medications Silver nitrate may interact with:

Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.

Where to buy Silver nitrate in Hong Kong?

In Hong Kong, Silver nitrate is an over-the-counter medicine and can be purchased without a prescription from any retail outlet in Hong Kong. This includes grocery stores, convenience stores, medicine shops, and pharmacies. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.

For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at

Need more information?

For detailed information about the use of Silver nitrate in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.

Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.