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Metanx Information

author image Allison Adams
Allison Adams has worked as a registered dietitian since 1996. She began writing professionally in 2000, with work featured in a variety of medical publications such as "Women's Health Magazine" and the "New England Journal of Medicine." Adams holds a Master of Science in nutrition and food sciences from the University of Wisconsin-Madison.
Metanx Information
Woman holding pill bottle with vitamin on her tongue Photo Credit Jose Luis Pelaez Inc/Blend Images/Getty Images

Metanx is the brand name of a multivitamin manufactured by Pamlab. Each Mentax tablet contains 25 mg of vitamin B-6, 2.8 mg of folic acid and 2 mg of vitamin B-12. Generally, these vitamins work by increasing the blood flow to your nerves. Mentax is a prescription medication, only available under a doctor’s supervision.

Treating Diseases

According to the “Red Book 2010: Pharmacy’s Fundamental Reference,” Metanx is indicted to treat patients with hyperhomocysteinemia. Hyperhomocysteinemia is a condition that causes high levels of homocysteine in your blood. Patients with this condition typically have deficiencies in the vitamin B6, B12 and folic acid. According to “Integrative Medicine,” if you suffer hyperhomocysteinemia, you have increased risk of developing heart disease and blot clots. These blot clots can cause stroke and also miscarriages and pre-eclampsia in pregnant women. Metanx is also indicated to treat patients with diabetic neuropathy. Diabetic neuropathy is a condition that causes numbness, burning and tingling in the hands and feet. Individuals with diabetic neuropathy typically also have insomnia or difficulty falling asleep.

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According to the “Red Book 2010: Pharmacy’s Fundamental Reference,” the starting dosage for Metanx depends on your specific condition, but in most cases is one to two pills daily. Since Metanx is a prescription medication, your doctor will prescribe a specific dose. Always take Metanx with a glass of water. Further, if your doctor prescribes you multiple pills, you should spread dosages out at regular intervals throughout the day in order to maximize effective absorption. If you miss a dose, take the missed dose as soon as possible, but avoid double-dosing. You can take this prescription multivitamin with or without food.


Metanx has known interactions with a couple of other prescription medications including fluorouracil, a type of cancer drug, and hydantoins, a class of anti-convulsants. You should inform your doctor if you are a smoker or consume caffeine or alcohol on a regular basis. Further, if you suffer from anemia or if you are a pregnant women or nursing mother, you should generally avoid taking Metanx. Additionally, this drug is not indicated for children.

Allergic Reactions and Side Effects

If you take Metanx, you could experience a couple of allergic reactions, including labored breathing, swelling of the face, rash, hives, tightness or pain in the chest, mouth, lips or tongue, itching and dizziness. Known side effects associated with the use of Metanx include drowsiness, numbness, tingling and diarrhea. Also, after consuming this prescription multivitamin, some people experience a feeling of swelling in their entire body.

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