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Home Knowledge Center Wellness Library Methylnaltrexone Injection (METHYLNALTREXONE - INJECTION)

Methylnaltrexone Injection (METHYLNALTREXONE - INJECTION)

For constipation.

Brand Name(s): Relistor

Generic Name: Methylnaltrexone

Instructions

Instructions

This medicine is used by injecting it into the skin. Please ask your doctor, nurse or pharmacist for the correct places on your body where this medicine can be injected.

Read and make sure you understand the instructions for measuring dose and using syringe. If you have any questions, talk to your doctor, nurse, or pharmacist.

Always inspect the medicine before using.

The liquid should be clear or light yellow.

Check the medicine before each use. If the liquid medicine has any particles in it, appears discolored, or if the vial appears damaged, do not use it.

Keep medicine at room temperature. Protect from light.

Keep the medicine in its original container.

Do not freeze the medicine.

Never use any medicine that has expired.

Discard any remaining medicine after your dose is given.

If medicine has been drawn into a syringe, any medicine stored in the syringe should be used within 24 hours.

Wash your hands before and after handling this medicine.

You or a family member can be trained to give this medicine at home.

Do not inject into skin that is red, swollen or itchy.

Change the location of the injection each time. Choose a location at least 1 inch from the last injection.

Do not rub or massage the area where the injection was given.

Drink plenty of water while on this medicine.

If you miss a dose, contact your doctor for instructions.

Drug interactions can change how medicines work or increase risk for side effects. Tell your health care providers about all medicines taken. Include prescription and over-the-counter medicines, vitamins, and herbal medicines. Speak with your doctor or pharmacist before starting or stopping any medicine.

Tell your doctor if symptoms do not get better or if they get worse.

Stop taking other laxatives while using this medicine unless your doctor tells you otherwise.

Stay close to a bathroom after using this medication. This medicine works quickly. Most people have a bowel movement within a few minutes to a few hours after using this medicine.

Do not take the medicine more than once during 24 hours.

Cautions

Cautions

This medicine may cause you to experience some withdrawal symptoms from your pain medication. Tell your doctor right away if you have unusual sweating, chills, stomach pain, diarrhea, yawning or irritability.

Tell your doctor and pharmacist if you ever had an allergic reaction to a medicine.

Do not use the medication any more than instructed.

This medicine may cause dizziness or fainting, especially after exercising or in hot weather. Be very careful when standing or sitting up quickly.

Your ability to stay alert or to react quickly may be impaired by this medicine. Do not drive or operate machinery until you know how this medicine will affect you.

Please check with your doctor before drinking alcohol while on this medicine.

Tell the doctor or pharmacist if you are pregnant, planning to be pregnant, or breastfeeding.

Ask your pharmacist how to properly throw away used needles or syringes.

Do not share this medicine with anyone who has not been prescribed this medicine.

Some patients have serious side effects from this medicine. Ask your pharmacist to show you the information from the Food and Drug Administration (FDA) and discuss it with you.

Side Effects

Side Effects

The following is a list of some common side effects from this medicine. Please speak with your doctor about what you should do if you experience these or other side effects.

  • diarrhea
  • excess gas
  • pain, redness, swelling near injection
  • nausea
  • stomach upset or abdominal pain

Call your doctor or get medical help right away if you notice any of these more serious side effects:

  • severe or persistent abdominal pain
  • severe, watery or bloody diarrhea
  • dizziness
  • fainting
  • fever
  • severe or persistent vomiting

A few people may have an allergic reaction to this medicine. Symptoms can include difficulty breathing, skin rash, itching, swelling, or severe dizziness. If you notice any of these symptoms, seek medical help quickly.

Please speak with your doctor, nurse, or pharmacist if you have any questions about this medicine.

This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

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