Cyanocobalamin is a man-made form of vitamin B12 used to treat low levels (deficiency) of this vitamin. Vitamin B12 helps your body use fat and carbohydrates for energy and make new protein. It is also important for normal blood, cells, and nerves. Most people get enough vitamin B12 in their diet, but a deficiency may occur in certain health conditions (e.g., poor nutrition, pregnancy, stomach/intestinal problems, infection, cancer). Serious vitamin B12 deficiency may result in anemia, stomach problems, and nerve damage.
Read the Patient Information Leaflet provided by your pharmacist before you start using this medication and each time you get a refill. Follow the illustrated directions for the proper use of this medication. If you have any questions, consult your doctor or pharmacist.
Gently blow your nose before using this drug. If your product needs to be primed, follow the instructions on how to properly prime the bottle.
Use this medication in the nose once weekly or as directed by your doctor. Hot food or drinks may produce mucus that can wash away this medication. Therefore, avoid hot food or drinks for 1 hour before or after using this medication.
For products that contain more than 1 dose, keep track of the number of doses you use from each pump.
Dosage is based on your medical condition and response to treatment. Do not increase, decrease, or stop this medication without your doctor's approval. Use this medication regularly to get the most benefit from it. To help you remember, use it on the same day each week. It may help to mark your calendar with a reminder.
Headache, nausea, or runny nose may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
This medication may cause low potassium levels in the blood (hypokalemia). Tell your doctor right away if any of these unlikely but serious side effects occur: muscle cramps, weakness, irregular heartbeat.
People who have a rare blood disorder (polycythemia vera) may rarely have symptoms related to this disorder while taking cyanocobalamin. Seek immediate medical attention if any of these rare but very serious symptoms occur: chest pain (especially with shortness of breath), weakness on one side of the body, sudden vision changes, slurred speech.
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before using cyanocobalamin, tell your doctor or pharmacist if you are allergic to it; or to cobalt; or if you have any other allergies. Your doctor may recommend that you receive a smaller test dose before starting your regular dose. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: low potassium blood levels (hypokalemia), gout, a certain blood disorder (polycythemia vera), a certain eye disease (Leber's disease), other vitamin/mineral deficiencies (especially folic acid and iron).
Tell your doctor if you develop a stuffy or runny nose (e.g., due to a common cold or allergies) while using this medication. You may need to use another form of vitamin B12 when these symptoms are present.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
Based on information from related drugs, this medication may pass into breast milk. Consult your doctor before breast-feeding.
Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor or pharmacist first.
Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: drugs that may affect blood cell production (e.g., chloramphenicol, anti-cancer drugs, HIV drugs), other vitamins/nutritional supplements (especially folic acid).
Certain other drugs may interfere with laboratory tests for vitamin B12 levels, possibly causing false test results. Tell laboratory personnel and all your doctors if you take any of the following: anti-infective drugs (e.g., amoxicillin, erythromycin), methotrexate, pyrimethamine.
This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.
Overdose with this medication is very unlikely. However, if overdose is suspected, contact a poison control center or emergency room right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
Do not share this medication with others.
Laboratory and/or medical tests (e.g., serum potassium levels, complete blood count, hematocrit, vitamin B12 levels) should be performed to monitor your progress or check for side effects. Consult your doctor for more details.
This product is not a substitute for a proper diet. Remember that it is best to get your vitamins from healthy foods. Vitamin B12 is commonly found in many foods from animals, especially liver, kidney, fish and shellfish, meat, and dairy foods.
If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
Store the pump upright at room temperature away from light and moisture. Do not freeze. Do not store in the bathroom. Discard the pump after you have used the labeled number of doses on the product package. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised October 2015. Copyright(c) 2015 First Databank, Inc.
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