2025 Medication Fact Sheets Full Document_100825

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Thioguanine ( thye-oh-GWAH-neen ) (6-TG, Tabloid®) What is this medication used for? Thioguanine is used to treat some types of leukemias.

What does it look like? • Tablet How is it given? • By mouth (oral or po) What are the common side effects?

Special instructions: • Wear gloves when handling this medicine. • Take this medicine on an empty stomach at the same time every day. • Blood tests will be done frequently to monitor blood counts and liver function. • Consult your healthcare provider before becoming pregnant, fathering a child, or breastfeeding. It is important to use birth control while taking this medicine and for several months after treatment is completed.

• Mild nausea • Mouth sores • Loss of appetite What are the less common side effects? • Low blood counts (red blood cells, white blood cells, or platelets)

• Bruising • Bleeding • Damage to intestines • Changes to liver function tests • Jaundice – or yellowing or the skin or eye • Nausea or vomiting • Rash

Notes from Your Healthcare Team

Not all of the possible side effects of this medicine and precautions related to taking it are covered in this information sheet. For a complete list of side effects and precautions, ask your healthcare professional (doctor, nurse, pharmacist) for a manufacturer’s package insert or another reference.

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