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Generic name: Technetium Tc 99m Exametazimetek-NEE-shee-um-tee-see-nyne-tee-nyne-em-ex-a-MET-a-zeem ]
Brand names: Ceretec, Drax Exametazime
Drug class: Radiologic conjugating agents

Medically reviewed by Last updated on Aug 31, 2022.

Uses of Ceretec:

  • It is used with a special imaging test.

What do I need to tell my doctor BEFORE I take Ceretec?

  • If you have an allergy to technetium Tc 99m exametazime or any other part of Ceretec (technetium tc 99m exametazime).
  • If you are allergic to Ceretec (technetium tc 99m exametazime); any part of Ceretec (technetium tc 99m exametazime); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.
  • If you are breast-feeding. Do not breast-feed after the test is over for as long as your doctor has told you.

This medicine may interact with other drugs or health problems.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Ceretec (technetium tc 99m exametazime) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Ceretec?

  • Tell all of your health care providers that you take Ceretec (technetium tc 99m exametazime). This includes your doctors, nurses, pharmacists, and dentists.
  • This medicine is radioactive. You will need to follow what the doctor has told you to lessen being exposed to Ceretec (technetium tc 99m exametazime).
  • You will need to empty your bladder often after the test is over as your doctor has told you.
  • Drink lots of noncaffeine liquids after using Ceretec (technetium tc 99m exametazime) unless told to drink less liquid by your doctor.
  • Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Ceretec (technetium tc 99m exametazime) while you are pregnant.

How is this medicine (Ceretec) best taken?

Use Ceretec (technetium tc 99m exametazime) as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • It is given as a shot into a vein.

What do I do if I miss a dose?

  • Call your doctor to find out what to do.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Signs of high blood pressure like very bad headache or dizziness, passing out, or change in eyesight.
  • A burning, numbness, or tingling feeling that is not normal.
  • Fever.

What are some other side effects of Ceretec?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

  • Feeling tired or weak.
  • Headache.
  • Dizziness.
  • Flushing.
  • Upset stomach or throwing up.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Ceretec?

  • If you need to store Ceretec (technetium tc 99m exametazime) at home, talk with your doctor, nurse, or pharmacist about how to store it.

Consumer Information Use and Disclaimer

  • If your symptoms or health problems do not get better or if they become worse, call your doctor.
  • Do not share your drugs with others and do not take anyone else's drugs.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
  • Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Ceretec (technetium tc 99m exametazime), please talk with your doctor, nurse, pharmacist, or other health care provider.
  • If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.