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See also Precautions section. Cyanocobalamin is a man-made form of vitamin B12 used to prevent and treat low blood levels of this vitamin. Most people get enough vitamin B12 from their diet. Vitamin B12 is important to maintain the health of your metabolism, blood cells, and nerves. Serious vitamin B12 deficiency may result in a low number of red blood cells (anemia), stomach/intestine problems, and permanent nerve damage. Vitamin B12 deficiency may occur in certain health conditions (such as intestinal/stomach problems, poor nutrition, cancer, HIV infection, pregnancy, old age, alcoholism). It may also occur in people who follow a strict vegetarian (vegan) diet.

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Vitamin B-12 Side Effects Interactions FAQs

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1000MCG, Vitamin B-12 (30 Tablets)

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Vitamin B-12 Side Effects

This product usually has no side effects. If you have any unusual effects, contact your doctor or pharmacist promptly. 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. Many people using this medication do not have serious side effects. 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. Tell your doctor right away if any of these serious side effects occur: muscle cramps, weakness, irregular heartbeat. A very serious allergic reaction to this drug is rare. However, get medical help right away 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.

Interactions

This medication may interfere with certain lab tests (such as intrinsic factor, blood tests for other types of anemia), possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug.

Vitamin B-12 FAQs

What is vitamin B12 good for?

Vitamin B12 is essential for maintaining healthy nerve cells, supporting the production of DNA, and aiding in the formation of red blood cells. It also plays a crucial role in brain function and energy production. Adequate levels of vitamin B12 are important for preventing anemia and maintaining overall neurological health.

Who should not take B12?

Individuals who should avoid taking vitamin B12 supplements include those with known allergies to cobalt or cobalamin, as these are components of vitamin B12. Additionally, people with Leber's disease, a hereditary eye condition, should avoid B12 supplements, as it may worsen the condition. It is always advisable for individuals to consult with a healthcare provider before starting any new supplement, especially if they have underlying health conditions or are taking other medications.

What are the symptoms if you need B12?

Symptoms of vitamin B12 deficiency may include fatigue, weakness, constipation, loss of appetite, and weight loss. Neurological symptoms can also occur, such as numbness and tingling in the hands and feet, difficulty maintaining balance, depression, confusion, dementia, poor memory, and soreness of the mouth or tongue. If someone suspects a B12 deficiency, it is important to consult a healthcare provider for proper diagnosis and treatment.

What are the benefits of taking vitamin B12?

Vitamin B12 offers several benefits, including supporting nerve function, aiding in the production of DNA and red blood cells, and helping to prevent megaloblastic anemia, which can cause fatigue and weakness. It also plays a role in maintaining healthy brain function and may contribute to improved mood and energy levels. Additionally, vitamin B12 is important for cardiovascular health as it helps reduce homocysteine levels, which are associated with an increased risk of heart disease.