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Medical professionals consider vitamin B-12 to be non-toxic, but a small number of people who are allergic to the vitamin or some other component of a dietary supplement may experience numbness or tingling in the extremi... More »

www.reference.com Health Medications & Vitamins Side Effects

Studies have shown that the excessive intake of some vitamins, including beta carotene and vitamins A and E, can be harmful, according to NPR. Too much vitamin E and beta carotene can cause cancer, while elevated levels ... More »

www.reference.com Health Medications & Vitamins

Some signs of a vitamin B12 deficiency include constipation, general body weakness, pale skin, bleeding gums and weight loss. The best way to avoid getting vitamin B12 deficiency is by eating foods rich in the nutrient, ... More »

www.reference.com Health Nutrition & Diets Nutritional Amounts & Limits
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Common problems with vitamin B-12 injections include side effects, such as rash, itching, diarrhea, swelling and rapid weight gain, reports Drugs.com. Those who self-inject the medication must learn to administer injecti... More »

www.reference.com Health Medications & Vitamins Side Effects

Taking vitamin B-12 counters the negative effects of vitamin B-12 deficiency, according to Mayo Clinic. Studies show that the mental function of infants is affected by vitamin B-12 levels during pregnancy. Vitamin B-12 u... More »

www.reference.com Health Medications & Vitamins Side Effects

MedlinePlus states that suddenly stopping Cymbalta can lead to withdrawal symptoms such as nausea, vomiting, diarrhea, anxiety, dizziness, tiredness, headache, pain, irritability, difficulty falling asleep or staying asl... More »

www.reference.com Health Medications & Vitamins Side Effects

Side effects of vitamin B-12 include stomach pain, nosebleeds, chest pain, dizziness and irregular heartbeat, according to Drugs.com. Additional side effects include ringing in the ears, chest tightness, difficulty breat... More »

www.reference.com Health Medications & Vitamins Side Effects