Vitamin b 12 500 mcg12/11/2022 stomach/intestinal surgery (such as gastric bypass or bowel resection).You may need a form of vitamin B12 that is injected or inhaled in the nose if you have any of the following health problems: low potassium blood levels (hypokalemia)Ĭyanocobalamin taken by mouth should only be used if your body can properly absorb it.a certain blood disorder (polycythemia vera).a certain eye disease (Leber's optic neuropathy).If you have any of the following health problems, consult your doctor or pharmacist before using this medication: Talk to your pharmacist for more details. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Precautionsīefore taking cyanocobalamin, tell your doctor or pharmacist if you are allergic to it or to any form of vitamin B12 or to cobalt or if you have any other allergies. You may report side effects to Health Canada at 1-86. You may report side effects to FDA at 1-80 or at In Canada - Call your doctor for medical advice about side effects. If you notice other effects not listed above, contact your doctor or pharmacist.Ĭall your doctor for medical advice about side effects. This is not a complete list of possible side effects. itching/swelling (especially of the face/tongue/throat).However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: Tell your doctor right away if any of these serious side effects occur:Ī very serious allergic reaction to this drug is rare. If you have severe anemia, this medication may rarely cause low potassium levels in the blood (hypokalemia) as your body makes new red blood cells. Many people using this medication do not have serious side effects. If your doctor has directed you to use this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. If you have any unusual effects, contact your doctor or pharmacist promptly. This product usually has no side effects. If your condition lasts or gets worse, or if you think you may have a serious medical problem, seek immediate medical attention. Avoid taking large doses of vitamin C within one hour before or after taking this product. Vitamin C (ascorbic acid) can decrease the amount of vitamin B12 you absorb. If you are taking the rapidly-dissolving tablets, dissolve in the mouth with or without water as directed by your doctor or the product package. If you are taking the chewable tablet, chew the medication thoroughly before swallowing. Doing so can release all of the drug at once, increasing the risk of side effects. If you are taking the extended-release tablets, do not crush or chew them. Some liquid brands may require you to shake the bottle well before each dose. Do not use a household spoon because you may not get the correct dose. If you are using the liquid form of this medication, carefully measure the dose using a special measuring device/spoon. Read the dosing instructions carefully for each product because the amount of cyanocobalamin (vitamin B12) may be different between products. There are many brands and forms of cyanocobalamin (vitamin B12) available. Consult your doctor or pharmacist for more details. The dosage is based on your medical condition, response to treatment, and laboratory tests. To help you remember, take it at the same time each day. Use this product regularly to get the most benefit from it. Take this medication by mouth with or without food as directed by your doctor or the product package, usually once daily. If your doctor has directed you to take this medication, take as directed by your doctor. If you have any questions, consult your pharmacist. If you are taking the over-the-counter product to self-treat, follow all directions on the product package before taking this medication.
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