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Read the Patient Information Leaflet if available from your pharmacist before you start using cantharidin and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

This medication is for use on the skin only. It is applied to the affected area by a healthcare professional as directed by your doctor, usually every 3 weeks as needed. It should not be applied inside the nose, mouth, or vagina, or in or near the eyes. The treated area should not be covered with bandages. After the medication is applied, do not touch, bite, or lick the treated area. Make sure the treated areas of the skin do not come in contact with the mouth, nose, eyes, or genital areas. If you do get the medication in those areas, rinse with plenty of water and get medical help right away.

This medication is flammable until dry. Avoid smoking or being near open flames while using the medication and until the medication has dried.

The medication should be washed off with soap and water as directed by your doctor, usually 24 hours after treatment. It may be washed off earlier if severe pain or blistering occurs on the treated area. Ask your doctor for more details.

Avoid applying other products to the treated areas of the skin until at least 24 hours after the treatment or until the treated area is washed off.

Tell your doctor if your condition does not get better or if it gets worse.

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

Keep all medical and lab appointments.

Not applicable.

Not applicable. This medication is applied in a clinic or doctor's office and will not be stored at home.

Before using cantharidin, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.

It is unknown if this drug passes into breast milk. Consult your doctor before breastfeeding.

This medicine may be harmful, possibly fatal, if swallowed. If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call 1-800-222-1222. Canada residents can call 1-844-764-7669. Symptoms of overdose or swallowing may include: severe stomach/abdominal pain, seizures, weakness, unusual bleeding/bruising, change in the amount of urine.