Side Effects of Vitamin B Complex

Taking a vitamin B complex can help maintain appropriate body function. Side effects of vitamin B complex can appear if the patient develops an allergy to the item or if the patient takes more than the recommended quantity of the medication.

Vitamin B is used to help keep proper cell metabolism. It is a water soluble vitamin that the body breaks down through food digestion to promote proper physical function. Originally scientists believed that there was only one B vitamin, however research has actually revealed that there are 8 vitamins in the B vitamin complex: B1 (Thiamine), B2 (Riboflavin), B3 (Niacin), B5 (Pantothenic Acid), B6 (Pantothenic Acid), B7 (Biotin), B9 (Folic Acid), and B12 (Cyanocobalamin). Each of these vitamins plays an unique function in maintaining the body. Lots of take vitamin B complex supplements to enhance these natural effects.

Side Effects of Vitamin B Complex

Side effects of taking a B vitamin complex are not typical, especially if the patient takes the medication as prescribed quantity. Taking extreme amounts of a vitamin B complex can cause side effects. An overdose is signified by: dizziness, frequent urination, change in the color of the urine, black stools, constipation, diarrhea, abdominal pain, queasiness, vomiting, soreness of the skin and itching.

In severe cases, patients might establish an allergy to their vitamin B complex. If you are taking a B vitamin complex and unexpectedly experience itching, a rash, kidney stones, swelling, wheezing or hives stop taking the complex right away. If your symptoms continue or you feel as though your reaction is life threatening, call your physician as quickly as possible.

Side Effects of Vitamin B Complex

Side Effects of Vitamin B Complex Components

Patients may also experience side effects from excessive direct exposure to a particular B vitamin. Most of the times, this discomfort can be eased by limiting your consumption of the vitamin. If your reaction is particularly severe, contact your doctor instantly.

Vitamin B1 – Thiamine

In rare cases, a thiamine overdose can cause restlessness, fluid retention, nausea, weakness and sweating. In severe cases, a thiamine overdose can cause dizziness, problem breathing, and tightness in the chest, swelling of the tongue or face, or discoloration of the skin. Allergies to thiamine can cause itching, hives or rashes on the skin.

Vitamin B2 – Riboflavin

Taking a riboflavin supplement will frequently cause the urine to turn a yellow-orange color. This side effect is harmless. In higher doses, riboflavin might lead to increase in urination or diarrhea. Severe responses can cause difficulty breathing, swelling of the face, lips, throat or tongue, or hives on the skin.

Vitamin B3 – Niacin

Niacin will regularly cause flushing, which might include burning, sweating, tingling, redness or chills. These can last as long as 4 hours after taking the supplement, but this is a harmless condition. Other typical side effects of taking niacin include upset stomach, nausea, vomiting, diarrhea, heartburn or dizziness. In severe cases, taking niacin can lead to persistent headache, irregular heart beat, swelling of the arms or legs, joint pain, or blurred vision. In unusual cases patients may also experience intense abdominal pain, constant nausea or vomiting, bloody or black stools, yellowing of the eyes and muscle or joint pain. Allergic reactions to niacin can result in swelling of the lips, tongue, throat or face, itching or hives.

Vitamin B5 – Pantothenic Acid

Patients who take pantothenic acid are really vulnerable to overdose. This can result in severe diarrhea. In rare cases, patients may develop an allergic reaction which may lead to tightness of the chest, trouble breathing or swelling of the face, throat, lips or tongue.

Vitamin B6 – Pyridoxine

Harmless effects of pyridoxine include stomach pain, drowsiness, tingling, and loss of appetite, nausea, or vomiting. Often ingesting large dosages of pyridoxine can cause brain and nerve problems. In unusual cases, this can lead to a numbing sensation in different parts of the body, most especially in the hands and feet, poor coordination or extreme fatigue. Allergic reactions to pyridoxine can result in swelling of the face, tongue, lips or throat, problem breathing or hives.

Vitamin B9 – Folic Acid

Taking extreme quantities of folic acid can increase the risk of cardiovascular disease, particularly in those who currently suffer from heart trouble. Excessive using folic acid may likewise increase your risk of developing lung or prostate cancer. Those getting injections of folic acid might experience pain and swelling or pain near the injection site. In severe cases allergic reactions may cause, swelling of the lips, face or tongue, tightness in the chest, hives, rash or dizziness.

Vitamin B12 – Cyanocobalamin

Patients using cyanocobalamin may experience diarrhea, itching or an increased risk of blood clots. In severe cases, allergic reactions to cyanocobalamin can cause chest pain, swelling of the face, tongue, or lips, swelling of the body, muscle weakness, fever, chills, bruising or bleeding.

Safety measure of Vitamin B Intake

You must not take B vitamin supplements if you are breastfeeding, pregnant, suffer from diabetes, ulcers or gout, are susceptible to allergic reactions to medications or are taking additional herbal or complementary medications that could adversely respond to these vitamins. Combine your supplement use with a healthy diet, natural sources of B vitamins, a well balanced diet and workout for the best results.

Last modified: February 14, 2017


The Author

Reyus Mammadli

As a healthy lifestyle advisor I try to guide individuals in becoming more aware of living well and healthy through a series of proactive and preventive measures, disease prevention steps, recovery after illness or medical procedures.

Education: Bachelor Degree of Medical Equipment and Electronics.

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