Drug Name
Purinethol (Mercaptopurine)

Drug Uses
Purinethol is used to treat leukemia. It is also used for pediatric non-Hodgkin's lymphoma, polycythemia vera, and psoriatic arthritis. This medication may also be used for inflammatory bowel disease.

How to use
This is a potent medication. Take it exactly as prescribed. Unless your doctor instructs you otherwise, drink plenty of fluids to avoid dehydration. Contact your doctor if you vomit shortly after taking your dose.

Drug Class and Mechanism
Mercaptopurine belongs to the group of cancer-fighting medicines known as antineoplastics, and specifically to the group of antineoplastics known as antimetabolites. Mercaptopurine fights cancer by preventing the growth of cancer cells, which eventually results in their destruction. Mercaptopurine is usually used to treat leukemia.

Missed Dose
Take the dose as soon as remembered but if it is almost time to take your next dose, skip the missed dose and resume your regular dosing schedule. Do not double dose to catch up.

Storage
Store at room temperature away from sunlight and moisture.

Warnings/Precautions
Tell your doctor your medical history, especially of: kidney disease, liver disease, any infections, previous anti-cancer treatment, blood disorders, recent exposure to chickenpox, any allergies you may have. This medication can lower your body's ability to fight an infection. Notify your doctor if you develop any signs of infection such as fever, sore throat, rash or chills. Avoid touching your eyes or inside your nose without first washing your hands. Use caution with sharp objects like safety razors or nail cutters and avoid activities such as contact sports in order to lower the chance of getting cut, bruised or injured. Do not have immunizations/vaccinations without consent of your doctor and avoid contact with people who have recently received oral polio vaccine. Drinking alcohol may increase the possibility of developing stomach (GI tract) irritation or liver damage. Contraceptive (birth control) measures are recommended for use in men and women while taking this medication. This medication is not recommended for use during pregnancy. Consult your doctor. It is not known if this drug passes into breast milk. Because this is a powerful drug and may affect a nursing infant, consult your doctor before breast-feeding.

Possible Side Effects
Diarrhea, nausea, vomiting, loss of appetite, stomach/abdominal pain, weakness, skin rash, darkening of the skin, or hair loss may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Tell your doctor immediately if any of these serious side effects occur: mouth sores, fever, sore throat, easy bruising or bleeding, pinpoint red spots on the skin, yellowing of eyes or skin, dark urine, painful or difficult urination. Tell your doctor immediately if any of these unlikely but serious side effects occur: black or tarry stools, blood in urine or stool. An allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of an allergic reaction include: rash, itching, swelling, dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor or pharmacist

More Information
Regular doctor visits are important. Keep all medical appointments. Blood tests will be done to monitor your progress.