Generic Name: thioguanine (Oral route)
Medically reviewed by Drugs.com. Last updated on Feb 3, 2020.
Commonly used brand name(s)
In the U.S.
Available Dosage Forms:
Therapeutic Class: Antineoplastic Agent
Pharmacologic Class: Antimetabolite
Uses for Tabloid
Thioguanine is used to treat acute non-lymphocytic leukemia. It belongs to the group of medicines known as antimetabolites. Thioguanine interferes with the growth of cancer cells, which are eventually destroyed.
This medicine is available only with your doctor's prescription.
Before using Tabloid
Appropriate studies performed to date have not demonstrated pediatric-specific problems that would limit the usefulness of thioguanine in children. However, children are especially sensitive to the effects of thioguanine and may increase the risk of liver toxicity, which may require caution in patients receiving this medicine.
Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of thioguanine in the elderly. However, elderly patients are more likely to have serious unwanted effects (eg, liver toxicity), which may require caution in patients receiving this medicine.
|All Trimesters||D||Studies in pregnant women have demonstrated a risk to the fetus. However, the benefits of therapy in a life threatening situation or a serious disease, may outweigh the potential risk.|
Interactions with medicines
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Interactions with food/tobacco/alcohol
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
Other medical problems
- Infection—May decrease your body's ability to fight an infection.
- Liver disease—Effects may be increased because of slower removal of the medicine from the body.
- Thiopurine methyltransferase deficiency (genetic deficiency)—Use with caution. May make you more sensitive to the side effects of thioguanine.
Proper use of Tabloid
Medicines used to treat cancer are very strong and can have many side effects. Before using this medicine, make sure you understand all the risks and benefits. It is important for you to work closely with your doctor during your treatment.
Take this medicine only as directed by your doctor. Do not take more or less of it, do not take it more often, and do not take it for a longer time than your doctor ordered.
Thioguanine is sometimes given together with certain other medicines. Make sure that you take each one at the right time and do not mix them. Ask your health care professional to help you plan a way to take your medicine at the right times.
Limit the amount of alcohol you drink during treatment with this medicine.
- For oral dosage form (tablets):
- For acute non-lymphocytic leukemia:
- Adults—Dose is based on body weight and must be determined by your doctor. At first, 2 milligrams per kilogram (mg/kg) of body weight per day for up to 4 weeks. Your doctor may adjust your dose as needed and tolerated.
- Children—Dose is based on body weight and must be determined by your doctor. At first, 2 milligrams per kilogram (mg/kg) of body weight per day for up to 4 weeks. Your doctor may adjust your dose as needed and tolerated.
- For acute non-lymphocytic leukemia:
This medicine needs to be given on a fixed schedule. If you miss a dose, call your doctor, home health caregiver, or treatment clinic for instructions.
Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.
Keep out of the reach of children.
Do not keep outdated medicine or medicine no longer needed.
Ask your healthcare professional how you should dispose of any medicine you do not use.
Precautions while using Tabloid
It is very important that your doctor check your or your child's progress at regular visits to make sure that this medicine is working properly and to check for unwanted effects.
Do not use this medicine if thioguanine or mercaptopurine (Purinethol®) has not been effective in treating your condition in the past.
Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant during treatment with this medicine. If you think you have become pregnant while using this medicine, tell your doctor right away.
Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, vomiting, or yellow eyes or skin. These could be symptoms of a serious liver problem.
Thioguanine can lower the number of white blood cells in your blood temporarily, increasing the chance of getting an infection. It can also lower the number of platelets, which are necessary for proper blood clotting. If this occurs, there are certain precautions you can take, especially when your blood count is low, to reduce the risk of infection or bleeding:
- If you can, avoid people with infections. Check with your doctor immediately if you think you are getting an infection or if you get a fever or chills, cough or hoarseness, lower back or side pain, or painful or difficult urination.
- Check with your doctor immediately if you notice any unusual bleeding or bruising, black, tarry stools, blood in urine or stools, or pinpoint red spots on your skin.
- Be careful when using a regular toothbrush, dental floss, or toothpick. Your medical doctor, dentist, or nurse may recommend other ways to clean your teeth and gums. Check with your medical doctor before having any dental work done.
- Do not touch your eyes or the inside of your nose unless you have just washed your hands and have not touched anything else in the meantime.
- Be careful not to cut yourself when you are using sharp objects such as a safety razor or fingernail or toenail cutters.
- Avoid contact sports or other situations where bruising or injury could occur.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.
Tabloid side effects
Check with your doctor immediately if any of the following side effects occur:
- Black, tarry stools
- blood in the urine or stools
- joint pain, stiffness, or swelling
- lower back, side, or stomach pain
- painful or difficult urination
- pinpoint red spots on the skin
- swelling of the feet or lower legs
- unusual bleeding or bruising
Incidence not known
- Bloody, black, or tarry stools
- decrease in the amount of urine
- noisy, rattling breathing
- right upper abdominal pain and fullness
- severe stomach pain, cramping, or burning
- stomach bloating
- swelling of the fingers or hands
- trouble breathing
- troubled breathing at rest
- vomiting of material that looks like coffee grounds, severe and continuing
- weight gain
- yellow eyes or skin
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
- Blurred vision
- cloudy urine
- dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
- dry mouth
- general feeling of discomfort or illness
- increased sweating
- unusual tiredness or weakness
- Loss of appetite
- swelling or inflammation of the mouth
- weight loss
Copyright 2020 Truven Health Analytics, Inc. All Rights Reserved.